IRMNG

Between brackets is the number of accepted species

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Biota
Kingdom Animalia
Phylum Acanthocephala
Phylum Agmata †
Phylum Animalia (awaiting allocation)
Phylum Animalia incertae sedis
Phylum Annelida
Phylum Arthropoda
Subphylum Chelicerata
Subphylum Crustacea
Subphylum Hexapoda
Subphylum Myriapoda
Subphylum Trilobitomorpha †
Class Marrellomorpha †
Class Merostomoidea †
Class Paratrilobita †
Class Trilobita †
Order Agnostida †
Order Asaphida †
Order Corynexochida †
Order Harpetida †
Order Lichida †
Order Naraoiida †
Order Nektaspida †
Order Odontopleurida †
Order Olenellida †
Order Phacopida †
Order Polymerida †
Order Proetida †
Order Ptychopariida †
Order Redlichiida †
Order Trilobita (awaiting allocation) †
Family Trilobita (awaiting allocation) †
Genus Abakanopleura Sivov in Khalfin, 1955 †
Genus Abdulinaspis Ergaliev, 1980 †
Genus Acadolenus Sdzuy, 1967 †
Genus Acanthagnostus Qian, 1982 †
Genus Acanthalomina Prantl & Pribyl, 1949 †
Genus Acanthaspides Ivshin, 1956 †
Genus Acanthocephalus Qiu, 1983 †
Genus Acanthocnemis Hawle & Corda, 1847 †
Genus Acanthogramma Hawle & Corda, 1847 †
Genus Acantholenus Matthew, 1898 †
Genus Acanthomicmacca Hupé, 1953 †
Genus Acastocephala Shergold, 1966 †
Genus Acetopeltis † accepted as Ascetopeltis Owens, 1973 †
Genus Achylsopsis Fritz, 1968 †
Genus Acrocephalaspina Ergaliev, 1980 †
Genus Acrocephalinella Romanenko in Lazarenko & Nikiforov, 1968 †
Genus Acrohybus Raymond, 1937 †
Genus Aculeodiscus Snajdr, 1951 †
Genus Acutaspis Repina in Repina, Belyaeva & Sobolev, 1976 †
Genus Acutatagnostus Ergaliev, 1980 †
Genus Acutatognostus † accepted as Acutatagnostus Ergaliev, 1980 †
Genus Acutimetopus Hahn & Hahn, 1985 †
Genus Adelopus Rafinesque, 1832 †
Genus Adiaksis Zhuravleva, Repina & Khomentovsky, 1959 †
Genus Aegunaspis Khairullina in Repina, Yaskovich et al., 1975 †
Genus Aeonia Burmeister, 1843 †
Genus Aethedionide Zhou & Ju, 1983 †
Genus Aethia Qian & Zhou, 1984 †
Genus Aethodionide † accepted as Aethedionide Zhou & Ju, 1983 †
Genus Afghancephalites Wolfart, 1970 †
Genus Afghancephalites Weippert & Wolfart, 1968 †
Genus Afghanopyge Durkoop, Mensink & Plodowski, 1967 †
Genus Agalatus Lisogor, 1961 †
Genus Agaso Cobbold, 1934 †
Genus Agasso † accepted as Agaso Cobbold, 1934 †
Genus Aglagalia Hupé, 1960 †
Genus Agnostardis Öpik, 1963 †
Genus Agnostaridis † accepted as Agnostardis Öpik, 1963 †
Genus Agnostascus Öpik, 1967 †
Genus Agnostoglossa Öpik, 1967 †
Genus Agnostonymus Öpik, 1979 †
Genus Agraulaeva †
Genus Agrauloides Howell, 1937 †
Genus Aguaraya Rusconi, 1954 †
Genus Aguilarella Benedetto, 1979 †
Genus Agyrenella Ivshin, 1957 †
Genus Aidarella Lermontova, 1951 †
Genus Ainasuella Maksimova, 1978 †
Genus Ainoa Männil, 1958 †
Genus Ajirikina † accepted as Ajrikina Krys'kov in Borovikov & Krys'kov, 1963 †
Genus Ajrikina Krys'kov in Borovikov & Krys'kov, 1963 †
Genus Aksapyge Lisogor, 1977 †
Genus Aktugaiella Ergaliev, 1980 †
Genus Alacealus Repina in Zhuravleva & Repina, 1959 †
Genus Alacephalus Repina, 1960 †
Genus Alataja Poletaeva in Zhuravleva & Repina, 1959 †
Genus Alataspis Park & Choi, 2011 †
Genus Alataupleura Lisogor, 1974 †
Genus Alataupleura Lisogor, 1977 †
Genus Alataurus Repina in Repina, Khomentovskii et al., 1964 †
Genus Albacania †
Genus Alborsella Kushan, 1973 †
Genus Aldonellus Koptev in Nomokorov, 1969 †
Genus Alemtejoia Kobayashi, 1943 †
Genus Aliger Howell, 1937 †
Genus Aligerites Howell, 1942 †
Genus Allocotichnus Osgood, 1970 †
Genus Alloctops Rafinesque, 1832 †
Genus Alloleiostegium Zhou & Zhang, 1978 †
Genus Alokistocaropsis Repina in Musatov, 1965 †
Genus Alokistokaropsis † accepted as Alokistocaropsis Repina in Musatov, 1965 †
Genus Alomataspis Öpik, 1967 †
Genus Alreboaspis Pribyl & Vanek in Pribyl, Vanek & Pek, 1985 †
Genus Alsataspis Turner, 1940 †
Genus Altaesajania Maksimova, 1978 †
Genus Altaesajanis † accepted as Altaesajania Maksimova, 1978 †
Genus Altaiaspis Ivshin, 1960 †
Genus Altajaharpes Petrunina in Petranina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 †
Genus Altajaspis Elkin, 1965 †
Genus Altikolia Khairullina, 1962 †
Genus Altiplanelaspis Pribyl & Vanek, 1980 †
Genus Alueva Sdzuy, 1961 †
Genus Alueva Lotze, 1958 †
Genus Amechilus Ross, 1951 †
Genus Americare Lochman & Hu, 1960 †
Genus Amgaspis Chernysheva, 1956 †
Genus Amginouyia Chernysheva, 1956 †
Genus Amorphella Rozova, 1963 †
Genus Ampellatocephalina †
Genus Amphihys Angelin †
Genus Ampullatocephalina Lu & Qian, 1983 †
Genus Anacopodia †
Genus Anadoxides Matthews, 1899 †
Genus Anambon Landrum & Sherwin, 1976 †
Genus Anapliomera DeMott, 1987 †
Genus Anchonotellus †
Genus Ancyginaspis Pribyl & Vanek in Pribyl, Vanek & Pek, 1985 †
Genus Andalusiana Lotze, 1958 †
Genus Andegavia Pillet, 1973 †
Genus Andesaspis Kobayashi, 1935 †
Genus Andinopyge Branisa, 1965 †
Genus Andreaspis Struve, 1962 †
Genus Anginouyia Savitskii, Egorova & Shabanov, 1974 †
Genus Angusteva Hupé, 1953 †
Genus Angustibole Hahn, 1965 †
Genus Anomalocephalus Deiss, 1939 †
Genus Anomocaraspis Ivshin, 1953 †
Genus Anomocarellius Khairullina, 1973 †
Genus Anopocare Angelin, 1854 †
Genus Anopsites Rafinesque, 1832 †
Genus Antagmella Suvorova in Ogienko et al., 1974 †
Genus Antagmellus Lermontova in Zhuravleva & Repina, 1959 †
Genus Antagmopleura Lermontova in Sivov, Lermontova & Chernysheva, 1960 †
Genus Antagmopleura Chernysheva, 1961 †
Genus Antagmopleura Repina, 1960 †
Genus Antagnellus Lermontova in Zhuravleva & Repina, 1959 †
Genus Antatlaeva Hupé, 1960 †
Genus Anthes Goldfuss, 1843 †
Genus Anthracopeltis Boulay, 1880 †
Genus Aotiaspis Kobayashi, 1960 †
Genus Apachilites Ivshin, 1962 †
Genus Apatocephalus Wiman, 1905 †
Genus Apatokephalopsis Lermontova in Yavorsky, 1940 †
Genus Apatokephalus Brögger, 1897 †
Genus Apatonephalus †
Genus Apedopyanus Raymond, 1937 †
Genus Aphelaspidella Rasetti, 1965 †
Genus Aplexura Rozova, 1963 †
Genus Apolichas Kobayashi & Hamada, 1974 †
Genus Apollonaspis Petrunina in Repina, Yaskovich et al., 1975 †
Genus Aponileus Hu, 1963 †
Genus Aquaraya † accepted as Aguaraya Rusconi, 1954 †
Genus Araeocephalus Repina in Repina, Khomentovskii et al., 1964 †
Genus Araiocaris Pribyl & Vanek, 1980 †
Genus Arbataspis Sivov in Borukaev, 1955 †
Genus Archaeharpes Singleton in Lindner, 1953 †
Genus Archaeuloma Lee, 1978 †
Genus Arcticeraurinella Pribyl & Vanek in Pribyl, Vanek & Pek, 1985 †
Genus Arcticormistonia Lieberman, 1994 †
Genus Arctinuroides Phleger, 1936 †
Genus Arduennops Struve, 1972 †
Genus Areiaspis Pribyl & Vanek, 1964 †
Genus Arethusa Barrande, 1846 †
Genus Argentinops Pribyl & Vanek, 1980 †
Genus Arglina Khairullina, 1970 †
Genus Arion Barrande, 1846 †
Genus Arionides Barrande, 1847 †
Genus Aristarius Öpik, 1979 †
Genus Aristobeggia Lamont, 1978 †
Genus Armonia Walcott, 1924 †
Genus Aroeocephalus †
Genus Asaphagus Troost, 1834 †
Genus Asaphelloides Kobayashi, 1937 †
Genus Asaphides Zelizko, 1935 †
Genus Asaphoidichnus Miller, 1880 †
Genus Ascetopeltis Owens, 1973 †
Genus Asiatella Repina in Repina, Khomentovskii et al., 1964 †
Genus Aspidochuangia Lu & Qian, 1983 †
Genus Aspidolites Conrad, 1841 †
Genus Aspiodolites Vogdes, 1925 †
Genus Asteraspis Kobayashi, 1935 †
Genus Asteromajia Nan & Chang, 1982 †
Genus Asthenaspis Suvorova, 1959 †
Genus Asturiaspis Sdzuy, 1967 †
Genus Astyages Angelin †
Genus Atopophacops Zhou & Campbell, 1990 †
Genus Atratebia Shergold, 1975 †
Genus Aulacodiscus Westergård, 1946 †
Genus Aulacoparina Hintze & Jaanusson, 1956 †
Genus Aulacopleurella Alberti, 1981 †
Genus Aulacopleuroides Chu & Zhang, 1979 †
Genus Australoscutellum Chatterton & Campbell, 1980 †
Genus Australurus Ramsköld, 1986 †
Genus Austrosinia Zhang & Jell, 1987 †
Genus Autolichas Reed, 1924 †
Genus Avonaspis Lochman, 1940 †
Genus Aytounella Lamont, 1978 †
Genus Badainjaranaspis Lu, Zhou & Zhou, 1986 †
Genus Bagradia Repina in Repina, Khomentovskii et al., 1964 †
Genus Baikadamaspis Ergaliev, 1980 †
Genus Bajanaspis Ivshin, 1978 †
Genus Bajangoliaspis Sivov, 1960 †
Genus Baldwinaspis Laurie, 2006 †
Genus Baniaspis Destombes, 1972 †
Genus Banilatites Destombes, 1972 †
Genus Banqiaoites Yin, 1978 †
Genus Baojingia Yang, 1978 †
Genus Barklyella Shergold, 1969 †
Genus Barrandagnostus Ivshin, 1960 †
Genus Barrandeopeltis Pribyl & Vanek, 1984 †
Genus Barrandia Hall, 1860 †
Genus Bartoninus Tripp, 1962 †
Genus Basanellus Repina, 1960 †
Genus Bashania Qiu, 1983 †
Genus Basilicoides Harrington, 1937 †
Genus Batenioides Repina, 1960 †
Genus Batenoides †
Genus Bathyholcus Rasetti, 1961 †
Genus Bathyurina Poulsen, 1937 †
Genus Bathyuriscellus Lermontova, 1951 †
Genus Bathyuriscidella Rasetti, 1948 †
Genus Bathyuriscina Poletaeva in Pokrovskaya, 1959 †
Genus Bathyuriscops Keller & Lisogor, 1954 †
Genus Battus Dalman, 1826 †
Genus Beggaspis Pribyl & Vanek, 1981 †
Genus Beikedamaspis †
Genus Beikuangaspis Zhang, 1983 †
Genus Beleckella Hahn, Hahn & Brauckmann, 1992 †
Genus Belenops Eldredge & Branisa, 1980 †
Genus Belliceps Repina, 1966 †
Genus Belsuops Nikitin, Apollonov & Tsai, 1968 †
Genus Benxiaspis Guo & An, 1982 †
Genus Bergerolimbus Hupé, 1960 †
Genus Bergeronia Matthew, 1895 †
Genus Bergeronopsis Hupé, 1960 †
Genus Bernicella Frederickson, 1949 †
Genus Biavertia Öpik, 1967 †
Genus Bicaspis Resser, 1938 †
Genus Bicornipyge Lisogor, 1961 †
Genus Bicyclopyge Horbinger & Vanek, 1985 †
Genus Bigranulella Shaw & Clark, 1968 †
Genus Bijelina Romanenko in Romanenko & Romanenko, 1967 †
Genus Billingsaspis Resser, 1935 †
Genus Bilobites Rafinesque, 1831 †
Genus Binella Semashko, 1969 †
Genus Binodaspis Lermontova, 1951 †
Genus Biragnostus Pokrovskaya, 1960 †
Genus Birmanitella Kobayashi, 1960 †
Genus Blackwelderiella Sun in Grabau, 1937 †
Genus Blayacina Cobbold, 1932 †
Genus Blountina Lochman in Lochman & Duncan, 1944 †
Genus Bodenbenderia Harrington & Leanza, 1957 †
Genus Boeckia Pillet, 1965 †
Genus Bohemaspis Horbinger, 1986 †
Genus Bohemolichas Pribyl & Vanek, 1972 †
Genus Bojokoralaspis Snajdr, 1984 †
Genus Bolaspidaspis Rozova, 1964 †
Genus Bolaspidellus Lazarenko in Lazarenko & Nikiforov, 1968 †
Genus Bolaspidellus Lazarenko & Datsenko, 1967 †
Genus Bolusspidaspis †
Genus Bondarevites Lazarenko, 1989 †
Genus Bonniaspis †
Genus Bonnioides Suvorova, 1964 †
Genus Bonocephalus Barrande, 1846 †
Genus Bornemannia Walcott, 1908 †
Genus Bornholmaspis Pribyl & Vanek in Pribyl, Vanek & Pek, 1985 †
Genus Borovikovia Kraskov, 1977 †
Genus Borukaspis Ivshin, 1953 or 1957 †
Genus Boschchekulia Lermontova, 1951 †
Genus Brabbia Palmer, 1968 †
Genus Brachampyx Forbes †
Genus Brachyaspis Salter, 1866 †
Genus Brachymetopella Kobayashi & Hamada, 1978 †
Genus Brachymetopina Reed, 1893 †
Genus Brachypleura Angelin †
Genus Brackebuschia Harrington & Leanza, 1957 †
Genus Bradyfallotaspis Fritz, 1972 †
Genus Brandysops Horbinger, 1986 †
Genus Branisaspis Pribyl & Vanek, 1980 †
Genus Branisella Pribyl & Vanek, 1981 †
Genus Breviredlichia Zhang & Lin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Brevitermierella Hupé, 1953 †
Genus Bridgeia Lochman in Lochman & Duncan, 1944 †
Genus Brongniartia Salter, 1865 †
Genus Brontocephalina Chugaeva, 1972 †
Genus Brontocephalina Chugaeva, 1975 †
Genus Brontocephalus Kolobova, 1969 †
Genus Brontocephalus Kolobova, 1977 †
Genus Brutaspis Ivshin, 1983 †
Genus Bruxaspis Lamont, 1978 †
Genus Buitella Lazarenko in Rozova, 1964 †
Genus Bulajaspis †
Genus Bulbaspis Chugaeva, 1956 †
Genus Bulkuraspis Repina in Repina, Lazarenko et al., 1974 †
Genus Bullaglabellaspis Repina in Zhuravleva & Repina, 1959 †
Genus Bullicephalus Pribyl & Vanek, 1971 †
Genus Buttsiella Romanenko in Romanenko & Romanenko, 1967 †
Genus Buttsina Rozova, 1968 †
Genus Caborcella Lochman, 1948 †
Genus Calchaguiana Rusconi, 1956 † accepted as Calchaquiana Rusconi, 1956 †
Species Calchaguiana curvata †
Genus Calchaquiana Rusconi, 1956 †
Genus Calgachia Lamont, 1978 †
Genus Callidaspina Pokrovskaya in Zhuravleva, Zadorozhnaya et al., 1967 †
Genus Callidaspis Pokrovskaya, 1960 †
Genus Calycinoidia Lu & Chien, 1978 †
Genus Calymenopsis Berjeron, 1895 †
Genus Cambrunicornia Geyer, 1990 †
Genus Cancapolia Rusconi, 1954 †
Genus Canningella Legg, 1976 †
Genus Canotagnostus Rusconi, 1951 †
Genus Canotaspis Poulsen, 1960 †
Genus Canotiana Rusconi, 1950 †
Genus Caphyra Barrande, 1846 †
Genus Caputrotundum Deng & Zhao in Deng, Zhao & Wu, 1986 †
Genus Carausia Hicks, 1872 †
Genus Carinobasiliella Pribyl & Vanek, 1980 †
Genus Carinopyge Maksimova in Nikiforova, 1955 †
Genus Carlopsia Lamont, 1978 †
Genus Carmon Barrande, 1872 †
Genus Carnicia Richter, 1927 †
Genus Carniphillipsia Hahn & Brauckmann, 1975 †
Genus Catadoxides Matthew, 1899 †
Genus Catillicephalites Rasetti, 1963 †
Genus Catinouyia Zhang & Yuan, 1981 †
Genus Catochia Fortey, 1979 †
Genus Caulaspina Rozova, 1963 †
Genus Cavetia Pillet, 1973 †
Genus Cayastaia Rusconi, 1954 †
Genus Cayastria † accepted as Cayastaia Rusconi, 1954 †
Genus Cayupania Rusconi, 1958 †
Genus Cedaraspis Ivshin, 1960 †
Genus Cedarellus Lazarenko, 1966 †
Genus Cenagnostus Howell in Whittard, 1940 †
Genus Centriproetus Snajdr, 1977 †
Genus Cephalacanthus Lapworth, 1890 †
Genus Cephalocoeliaspis †
Genus Ceratagnostus Whitehouse, 1939 †
Genus Ceratevenkaspis Kramarenko, 1952 †
Genus Cermataspis Öpik, 1967 †
Genus Cermatops Shergold, 1980 †
Genus Chakassinella †
Genus Chakasskia Poletayeva, 1936 †
Genus Chakasskinella Repina in Repina et al., 1964 †
Genus Chalfontia Shergold, 1982 †
Genus Chambersiellus Lamont, 1975 †
Genus Chandrinouyina †
Genus Changaspis Chien, 1961 †
Genus Changyangia Chang in Lu, Chu et al., 1965 †
Genus Charaulaspis Lazarenko, 1962 †
Genus Chashania Lu & Sun, 1977 †
Genus Chatiania Yang, 1978 †
Genus Chatiania Yang MS., 1977 †
Genus Chatkalagnostus Khairullina & Abdullaev in Abdullaev & Khaletzkaya, 1970 †
Genus Chattiaspis Struve, 1958 †
Genus Chaunoproetoides Yuan, 1988 †
Genus Cheirurella Apollonov, 1970 †
Genus Chekiangaspis Lu, 1962 †
Genus Chekiangaspis Lu in Chien, 1961 †
Genus Chengcunia Qiu, 1984 †
Genus Chengjiangaspis Zhang & Lin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Chengkouella Lu & Chang, 1974 †
Genus Chengshanaspis Chang, 1963 †
Genus Chichikaspis Balashova, 1966 †
Genus Chimaerastella Gandl, 1972 †
Genus Chinensis †
Genus Chinghizella Borukaev & Ivshin, 1952 †
Genus Chittidilla King, 1941 †
Genus Chlustinia Pribyl & Vanek, 1965 †
Genus Chondragraulaspis Koptev in Nomokorov, 1969 †
Genus Chondragraulina Pokrovskaya in Zhuravleva & Repina, 1959 †
Genus Chondragraulina Pokrovskaya, 1960 †
Genus Chondragraulos Lermontova, 1940 †
Genus Chondranomocarella Pospelov & Fedyanina, 1958 †
Genus Chondrinouyina Repina in Khomentovskii & Repina, 1965 †
Genus Chondroparia Lorenz, 1906 †
Genus Choneilobarges Phleger, 1936 †
Genus Chorbusulina Lazarenko, 1962 †
Genus Chorionotus Meyer, 1853 †
Genus Chuangianoproetus Wu, 1977 †
Genus Chuangina Kobayashi, 1967 †
Genus Chuangioides Chu, 1959 †
Genus Chuangites Howell, 1945 †
Genus Chugaevia Pribyl & Vanek, 1972 †
Genus Chungkingaspis Lu, 1962 (1965?) †
Genus Chungkingaspis Lu, 1959 †
Genus Chunkingaspis †
Genus Churkinia Palmer, 1968 †
Genus Cilia Peng, 1992 †
Genus Cinnella Romanenko in Repina & Romanenko, 1978 †
Genus Clarkeaspis Lieberman, 1993 †
Genus Clemenella Khairullina in Repina et al., 1975 †
Genus Clevelandella Resser, 1938 †
Genus Cobboldia Lermontova, 1940 †
Genus Cobboldus Raw, 1936 †
Genus Cochliorrhoe Whittard, 1966 †
Genus Coelaspis Deiss, 1939 †
Genus Coenaspoides Poletaeva, 1977 †
Genus Coephalocoeliaspis Sivov, 1960 †
Genus Coignouina Reed, 1943 †
Genus Colliceps Repina in Repina, Lazarenko & Nikiforov, 1974 †
Genus Collis Koroleva, 1959 †
Genus Colpocoryphoides Harrington & Leanza, 1957 †
Genus Colpos Moberg, 1895 †
Genus Columbicephalus Kobayashi, 1955 †
Genus Colymbus Hadding, 1913 †
Genus Compsocephalus Repina, 1973 †
Genus Conagraulos Howell, 1937 †
Genus Conimetopus Hahn & Hahn, 1985 †
Genus Coniopleura Vogdes, 1925 †
Genus Conococheaguea Rasetti, 1959 †
Genus Conoides Howell, 1937 †
Genus Conokephaluella Hupé, 1960 †
Genus Conomicmacca Hupé, 1953 †
Genus Conoparia Hawle & Corda, 1847 †
Genus Conophrys Callaway, 1874 †
Genus Conopolus Robison, 1988 †
Genus Constrictella Wolfart, 1974 †
Genus Contracheirurus Chatterton & Perry, 1984 †
Genus Coombewoodia Archinal & Brauckmann, 1989 †
Genus Coosinoides Ivshin, 1983 †
Genus Coplacoparia Hammann, 1971 †
Genus Corbinia Walcott, 1924 †
Genus Cornovica Whittard, 1960 †
Genus Coronocephalina Wu, 1979 †
Genus Coronocephalina Wu MS., 1977 †
Genus Corynexochella Suvorova, 1964 †
Genus Costadiscus Babcock, 1994 †
Genus Costapyge Howell, 1937 †
Genus Costonia Whittard, 1956 †
Genus Cotalognostus Whitehouse, 1936 †
Genus Crassibole Gandl, 1980 †
Genus Crassifimbria Lochman, 1947 †
Genus Cremastoglottos Whittard, 1961 †
Genus Crithias Hawle & Corda, 1847 †
Genus Crossoura Moberg & Segerberg, 1906 †
Genus Crotalocephalus Pillet, 1965 †
Genus Crotalurus Volborth, 1858 †
Genus Crusoiina Poletaeva, 1972 †
Genus Crusola Walcott, 1924 †
Genus Cryptoderaspis Rasetti, 1946 †
Genus Cryptonymus Eichwald, 1825 †
Genus Cuchulain Lamont, 1978 †
Genus Culmenaspis Repina, 1972 †
Genus Curiaspis Sdzuy, 1955 †
Genus Curuyella Eldredge & Branisa in Eldredge & Ormiston, 1979 †
Genus Curuyella Eldredge & Branisa, 1980 †
Genus Cuyanaspis Rusconi, 1953 †
Genus Cybelina Reed, 1928 †
Genus Cyclagnostus Lermontova, 1940 †
Genus Cyclognathopsis Borukaev, 1955 †
Genus Cyclolenzellina †
Genus Cyclolorenzella Kobayashi, 1960 †
Genus Cyclolorenzella Lazarenko & Datsenko, 1967 †
Genus Cyclolorenzellina Ergaliev, 1980 †
Genus Cylindraspis Sandberger, 1849 †
Genus Cylindrocephalus Trenkner, 1868 †
Genus Cyphambon Shaw, 1962 †
Genus Cyphinium Weber, 1933 †
Genus Cypholichas Phleger, 1935 †
Genus Cyranolichas Phleger, 1936 †
Genus Daguinaspis Hupé, 1953 †
Genus Dainellicauda Kobayashi, 1960 †
Genus Dalarnepeltis Pribyl & Vanek, 1978 †
Genus Dalaspis Chatterton & Perry, 1983 †
Genus Daldynia Egorova in Egorova & Savitsky, 1969 †
Genus Daldynia Egorova in Datsenko & Lazarenko, 1968 †
Genus Dalmaniopsis Geinitz, 1862 †
Genus Dalmanitoides Delo, 1935 †
Genus Damiaoaspis Qiu, 1983 †
Genus Danangouia Chen, 1985 †
Genus Dananzhuangia Qiu, 1980 †
Genus Danarcus Ludvigsen & Tuffne, 1994 †
Genus Daniella Kovalevskii in Borisyak et al., 1974 †
Genus Danzhaiaspis Yuan & Zhou in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Danzhaina Yuan in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Danzhaisaukia Lu & Chien, 1978 †
Genus Daopingia Lee, 1978 †
Genus Datongites Chu, 1960 †
Genus Datsonia Shergold, 1975 †
Genus Deacalymene Whittington, 1965 †
Genus Dechenelloides Gandl, 1968 †
Genus Decordinaspis Harper & Romano, 1967 †
Genus Deisella Howell & Duncan, 1939 †
Genus Deissia Sun in Grabau, 1937 †
Genus Delgadodiscus Kobayashi, 1935 †
Genus Delgadoia Vogdes, 1917 †
Genus Delinghaspis Lin & Zhang, 1979 †
Genus Delleana Ivshin, 1983 †
Genus Deloites Destombes, 1972 †
Genus Deltacare Harrington & Leanza, 1957 †
Genus Deltacephalaspis Eldredge & Branisa, 1980 †
Genus Deltadiscus Kobayashi, 1943 †
Genus Deltocephalus Ogienko, 1969 †
Genus Deltophthalmus Resser, 1938 †
Genus Denaspis Repina in Zadorozhnaya et al., 1973 †
Genus Denckmannia Wedekind, 1912 †
Genus Dereimsia Kozlowski, 1923 †
Genus Desmetia Walcott, 1925 †
Genus Desmus Raw, 1908 †
Genus Destombesites Snajdr, 1987 †
Genus Deucalion Stschegloff, 1827 †
Genus Deuterolichas Reed, 1902 †
Genus Diabole Groning, 1985 †
Genus Diademaproetus Alberti, 1964 †
Genus Diandongaspis Lu & Zhang in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Diaoyaspis Yin, 1978 †
Genus Dicellocephalus Angelin, 1854 †
Genus Dichagnostus Jaekel, 1909 †
Genus Dicranactis Hawle & Corda, 1847 †
Genus Dictyocephalites Bergeron, 1895 †
Genus Didwudina Ivshin, 1983 †
Genus Dignaceps Khairullina in Repina, Petrunina & Khairullina, 1975 †
Genus Dikella Rosova in Rosova, Rosov & Dubatolova, 1985 †
Genus Dikellocephalus †
Genus Dikelus Rosova in Rosova, Rosov & Dubatolova, 1985 †
Genus Dimastocephalus Stubblefield, 1950 †
Genus Dindymenella Lu in Lu, Chu et al., 1976 †
Genus Dingxiangaspis Zhang, 1983 †
Genus Dionideina Snajdr, 1981 †
Genus Dionidepyga Snajdr, 1981 †
Genus Diopsites Rafinesque, 1832 †
Genus Dipharus Clark, 1923 †
Genus Diplapatokephalus Raymond, 1937 †
Genus Diplolichas Phleger, 1936 †
Genus Diplopsites Rafinesque, 1832 †
Genus Diplozyga Raymond, 1937 †
Genus Discagnostus Öpik, 1963 †
Genus Discomesites Öpik, 1976 †
Genus Distagnostus Shergold, 1971 †
Genus Dnestrovites Balashova, 1968 †
Genus Dolerasaphus Harrington & Leanza, 1957 †
Genus Dolgeuloma Rozova, 1963 †
Genus Dolichagnostus Pokrovskaya, 1958 †
Genus Domina Gorovtsova in Gorovtsova & Semenova, 1977 †
Genus Donggouia Lin & Zhang, 1979 †
Genus Dongshania Lin, 1983 †
Genus Doremataspis Öpik, 1967 †
Genus Dorypygaspis Khairullina, 1973 †
Genus Douposiella Lu, Chang, Chien, Chu et al., 1974 †
Genus Dreyfussina Hupé, 1956 †
Genus Dreyfussina Destombes & Jeanette, 1966 †
Genus Drummuckaspis Prantl & Pribyl, 1949 †
Genus Dubhglassina Lamont, 1948 †
Genus Dufresnoyiproetus Pillet, 1969 †
Genus Duodingia Chow in Lu, Chu et al., 1974 †
Genus Durinia Robison, 1988 †
Genus Dushania Yin, 1978 †
Genus Duyunia Chien, 1961 †
Genus Ebenezeria Marcou, 1888 †
Genus Echlnophacops Zhou, 1983 †
Genus Edganocare †
Genus Edgellia Shaw in Shaw & Stubblefield, 1950 † accepted as Trinucleus Murchison, 1839 †
Genus Effnaspis Dean, 1972 †
Genus Egle Barrande, 1846 †
Genus Eiffelaspis Chang, 1963 †
Genus Eilidh Lamont, 1975 †
Genus Eilura Resser & Endo in Kobayashi, 1935 †
Genus Eisarkaspis Laurie, 2006 †
Genus Ekeraspis Tjernvik, 1956 †
Genus Ekwanoscutellum Pribyl & Vanek, 1972 †
Genus Elandaspis Egorova in Nekhoroshev, 1958 †
Genus Elaphraella Lu & Qian, 1983 †
Genus Elatelimbus Repina, 1960 †
Genus Elbaspis Baldis & Blasco, 1973 †
Genus Eleganolimba Pokrovskaya, 1959 †
Genus Elicicola Jell in Bengtson, Conway Morris, Cooper, Jell & Runnegar, 1990 †
Genus Ellesides Lamont, 1975 †
Genus Ellipsocoryphe Lu, 1975 †
Genus Ellipsuella Hupé, 1960 †
Genus Elliptocephalus Emmons, 1844 †
Genus Ellotia Gatehouse, 1968 †
Genus Ellsaspis Rasetti, 1945 †
Genus Elmanaspis Ivshin, 1957 †
Genus Elvinoides Ivshin, 1983 †
Genus Elviraspis Ivshin, 1983 †
Genus Embolimus Rominger, 1887 †
Genus Emeidiscus Li, 1980 †
Genus Enammocephalus Repina in Repina et al., 1964 †
Genus Endoaspis Lochman, 1956 †
Genus Endocrania Kobayashi, 1956 †
Genus Endogramma Hawle & Corda, 1847 †
Genus Eniseja Poletaeva in Pokrovskaya, 1959 †
Genus Enneacnemis Hawle & Corda, 1847 †
Genus Enodiproetus Pribyl, 1970 †
Genus Enontioura Resser, 1942 †
Genus Enshia Chu in Lu, Chu et al., 1974 †
Genus Entoarchis Kobayashi, 1955 †
Genus Entomastracites Lovén, 1845 †
Genus Entomolithus Gesner, 1758 †
Genus Entomostracites Wahlenberg, 1821 †
Genus Entorachis Kobayashi, 1955 †
Genus Entsyna Rozova, 1968 †
Genus Eoasaphiscus Khairullina, 1973 †
Genus Eocatuniella Egorova in Egorova & Savitsky, 1969 †
Genus Eoceraurus Esker, 1964 †
Genus Eocheirurus Rozova, 1960 †
Genus Eocorycephalus Reed, 1925 †
Genus Eocorynexochus Korobeinikova, 1965 †
Genus Eoctenopyge Henningsmoen, 1957 †
Genus Eodaguinaspis Hupé, 1953 †
Genus Eodontopleura Qian & Lin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Eohomalonotus Reed, 1918 †
Genus Eokaninia Poletaeva, 1967 †
Genus Eopagetia Kobayashi, 1943 †
Genus Eopalpebralia Alberti, 1981 †
Genus Eoparadoxides Solov'ev, 1969 †
Genus Eopiriproetus Alberti, 1966 †
Genus Eoproeteus Zhang & Wang, 1984 †
Genus Eosaukia Lu, 1954 †
Genus Eoshengia Yang MS., 1977 †
Genus Eoshengia Yang, 1978 †
Genus Eosoptychoparia Chang, 1963 †
Genus Eosoptychopyge Zhang, 1981 †
Genus Eospencia Chernysheva, 1961 †
Genus Eotaitzuia Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Eowuhuia Zhang & Wang, 1984 †
Genus Eozacanthoides Qiu, 1980 †
Genus Epidaguinaspis Hupé, 1953 †
Genus Epumeria Rusconi, 1958 †
Genus Erbenaspis Vanek, 1961 †
Genus Erbenieoryphe Feist in Feist & Clarkson, 1989 †
Genus Erbiaspis †
Genus Erbina Pokrovskaya, 1959 †
Genus Erbocephalus Sivov in Sivov & Tomashpolskaya, 1958 †
Genus Erdelia Lomovitskaya, 1960 †
Genus Erdoradites Ivshin, 1983 †
Genus Erinnys Salter, 1865 †
Genus Erkelina Lazarenko, 1962 †
Genus Ermanella Maksimova in Nikiforova, 1955 †
Genus Erzishania Zhu & Qian in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Eskaspis Clarkson, Eldredge & Henry, 1977 †
Genus Esseigania Kobayashi, 1944 †
Genus Eteraspis Resser, 1935 †
Genus Euarges Gürich, 1901 †
Genus Euarthricocephalus Ju, 1983 †
Genus Eucalymene Lu, 1975 †
Genus Eucalymene Lu, 1959 †
Genus Eudechenella Richter, 1912 †
Genus Eujinnania Qiu, 1983 †
Genus Euleiostegium Zhou & Zhang, 1978 †
Genus Eulomella Kobayashi, 1955 †
Genus Euplethagnostus Lermontova in Vologdin, 1940 †
Genus Euproetus Richter, 1913 †
Genus Eurymetopus Postlethwaite, 1886 †
Genus Eutrimerocephalus Gortani, 1907 †
Genus Evenkaspis Kramarenko, 1952 †
Genus Ewacaste Ramsköld & Edgecombe, 1993 †
Genus Exigua Howell, 1937 †
Genus Ezhimia Pokrovskaya in Zhuravleva et al., 1967 †
Genus Fabulaspis Ivshin, 1952 †
Genus Faciura Rozova, 1963 †
Genus Faenicephalus †
Genus Falanaspis Tjernvik, 1956 †
Genus Fallagnostus Howell, 1935 †
Genus Fallotaspodella †
Genus Fandianaspis Lee, 1978 †
Genus Farsia Wolfart, 1974 †
Genus Fastigaspis Poulsen, 1964 †
Genus Feilongshania Qian & Lin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Feilongshania Chien & Lin, 1978 †
Genus Fenghuangella Yang, MS †
Genus Fengshania Sun, 1935 †
Genus Fengtienia Endo in Endo & Resser, 1937 †
Genus Fenniops Fortey & Owens, 1987 †
Genus Fialoides Hadding, 1913 †
Genus Finecrestia Nan & Chang, 1982 †
Genus Fitzroyaspis Legg, 1976 †
Genus Flexiscutellum Šnajdr, 1960 †
Genus Folliceps Öpik, 1970 †
Genus Forbesia M'Coy in Griffith, 1846 †
Genus Formosagnostus Ergaliev, 1980 †
Genus Francenaspis Alberti, 1969 †
Genus Franconicabole Alberti, 1976 †
Genus Fremontia Raw, 1936 †
Genus Fuquania Zhao in Zhao & Huang, 1981 †
Genus Fuyunia Hsiang & Zhang, 1981 †
Genus Gabriella † accepted as Garbiella Lazarenko & Datsenko, 1967 †
Genus Galahetes Öpik, 1975 †
Genus Gallagnostoides Kobayashi, 1939 †
Genus Gamops Snajdr, 1976 †
Genus Gangdeeria Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Gansucephalina Zhou in Zhou Li & Qu, 1982 †
Genus Garbiella Lazarenko & Datsenko, 1967 †
Genus Geesops Struve, 1972 †
Genus Geigibole Gandl, 1968 †
Genus Gelasene Palmer, 1968 †
Genus Gentilapsis †
Genus Gentilaspis Hupé, 1958 †
Genus Geoplaxis Rafinesque, 1832 †
Genus Georgiellus Möberg, 1899 †
Genus Geracephalina Kobayashi & Hamada, 1977 †
Genus Gerasaphes Clarke, 1894 †
Genus Geratrinodus Kobayashi & Hamada, 1978 †
Genus Gibbocephalus Pillet, 1965 †
Genus Gibscherella Repina, 1979 †
Genus Gigmpeltis †
Genus Gignopeltis Raymond, 1924 †
Genus Giordanella Bornemann, 1891 †
Genus Girvanagnostella Kobayashi, 1939 †
Genus Girvanagnostus Kobayashi, 1939 †
Genus Glabrella Lermontova, 1940 †
Genus Glabretina Lochman, 1965 †
Genus Gladiatoria Hupé, 1955 †
Genus Glavaspidella †
Genus Globusiella Hahn, Hahn & Brauckmann, 1992 †
Genus Glockeria Wedekind, 1911 †
Genus Glomerites Rafinesque, 1832 †
Genus Gloria Egorova & Savitsky, 1968 †
Genus Glossicephalus Howell, 1936 †
Genus Glossocorphus †
Genus Glossocoryphus Deiss, 1939 †
Genus Glyphanellus Ivshin, 1953 †
Genus Glyptagnostotes Lazarenko, 1966 †
Genus Glyptoscorpius Peach, 1883 †
Genus Gogoella Legg, 1976 †
Genus Goldfieldia Palmer, 1964 †
Genus Goldillaenoides Balashova, 1959 †
Genus Gomiites Pribyl & Vanek, 1978 †
Genus Goniacanthus Hawle & Corda, 1847 †
Genus Goniopleura Hawle & Corda, 1847 †
Genus Gorskia Poletaeva & Fedyanina, 1971 †
Genus Gorskia Poletaeva & Fedyanina, 1970 †
Genus Gortania Cossmann, 1909 †
Genus Goycoia Rusconi, 1950 †
Genus Graciella Rozova, 1963 †
Genus Gracilocoryphe Pribyl & Vanek, 1978 †
Genus Greylockia Raymond, 1937 †
Genus Gronwallia Kobayashi, 1935 †
Genus Gronwallina Rozova, 1964 †
Genus Grossia Alberti, 1960 †
Genus Grossoproetus Wu, 1987 †
Genus Gruetia Pillet, 1969 †
Genus Guangxiaspis Zhou, 1977 †
Genus Guangyuania Lee, 1978 †
Genus Guaranites Baldis & Hansen, 1980 †
Genus Guayakinites Baldis & Hansen, 1980 †
Genus Guizhouanomocare Lee, 1978 †
Genus Guizhoucephalina Chien, 1961 †
Genus Guizhoudiscus Zhang in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Guizhoudiscus Zhang, 1978 †
Genus Guizhouhystricurus Yin, 1978 †
Genus Guizhoupliomerops Chu & Yin, 1978 †
Genus Guleaspis Ivshin, 1983 †
Genus Gumunsoia Park, Sohn & Choi, 2012 †
Genus Guotangia Zhou, 1981 †
Genus Guraspis Semashko, 1969 †
Genus Habrocephalus Repina in Repina et al., 1964 †
Genus Hadraspis Wu & Lin in Zhang, Lin, Wu & Yuan, 1980 †
Genus Hadrokraspedon Shaw, 1962 †
Genus Hadrorachus Delo, 1935 †
Genus Hagiorites Kobayashi, 1951 †
Genus Hallaspis Raasch & Lochman, 1943 †
Genus Hamashania Kobayashi, 1941 †
Genus Hammannopyge Pribyl & Vanek in Pribyl, Vanek & Pek, 1985 †
Genus Hammatocnemis Kielan, 1960 †
Genus Hamptonella Resser, 1937 †
Genus Hamtonella Resser, 1937 †
Genus Hancrania Kobayashi, 1962 †
Genus Haniwapyge Rosova in Rosova, Rosov & Dubatolova, 1985 †
Genus Hanzhongaspis Chen in Li, Song et al., 1975 †
Genus Haploconus Raymond, 1913 †
Genus Harataspis Egorova & Savitsky, 1969 †
Genus Hartella Matthew, 1885 †
Genus Hauquinchaia †
Genus Hausiella Kobayashi in Kobayasi & Ichikawa, 1955 †
Genus Hausmanni in Vogdes †
Genus Hawkinsaspis Rasetti, 1968 †
Genus Hawkinsia Rasetti, 1965 †
Genus Hawleia Prantl & Šnajdr, 1957 †
Genus Hazarania Wolfart, 1969 †
Genus Hazarania Welppert & Wolfart, 1968 †
Genus Hazarania Wolfart, 1970 †
Genus Hectoria Lu, 1975 †
Genus Hederacauda Kobayashi, 1960 †
Genus Hejinaspis Zhang & Wang, 1984 †
Genus Helokybe Thomas in Thomas & Narbonne, 1979 †
Genus Hemicricometopus Lu, Chang, Chien, Chu et al., 1974 †
Genus Hemicrupturus Green, 1832 †
Genus Hemicrypturus Agassiz, 1843 †
Genus Hemicrypturus Corda in Hawle & Corda, 1847 †
Genus Hemicryptus Zittel, 1885 †
Genus Heraspis Wandas, 1983 †
Genus Herse Hawle & Corda, 1847 †
Genus Hesa Richter, 1941 †
Genus Hewenia Zhou, 1977 †
Genus Hexianolithus Zhang, 1983 †
Genus Heyelingella Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Hoekaspiella Rusconi, 1950 †
Genus Holocephalites Zhou in Zhou, Li & Qu, 1982 †
Genus Holomeris Hawle & Corda, 1847 †
Genus Holoubkocheilus Mergl, 1994 †
Genus Holoubkovia Pribyl & Vanek, 1969 †
Genus Holstonia Resser, 1938 †
Genus Holubaspis Pribyl, 1951 †
Genus Holubia Kloucek, 1934 †
Genus Homalops Remelé, 1885 †
Genus Homoglossa Raymond, 1912 †
Genus Honanaspis Chang, 1959 †
Genus Honania Lee MS. in Lu, Chang, Chu et al., 1965 †
Genus Housiella Kobayashi in Kobayasi & Ichikawa, 1955 †
Genus Howellaspis Lochman & Denson in Lochman & Duncan, 1944 †
Genus Howelluella Hupé, 1960 †
Genus Hsiaella †
Genus Hsiaiella Resser & Endo in Kobayashi, 1935 †
Genus Hsiaoshia Endo, 1944 †
Genus Huaguinchaya Rusconi, 1955 † accepted as Huaquinchaya Rusconi, 1955 †
Genus Hualongella Lin & Zhang, 1979 †
Genus Huamiaocephalus Qiu, 1983 †
Genus Huangnigangia Han & Ju, 1983 †
Genus Huaquinchaia Rusconi, 1955 †
Genus Huaquinchaya Rusconi, 1955 †
Genus Huilichia Rusconi, 1955 †
Genus Hukasawaia Kobayashi, 1953 †
Genus Hunanaspis Zhou, 1977 †
Genus Hunanolenus Liu, 1977 †
Genus Hunanoproetus Yang, 1981 †
Genus Hungia Walcott, 1913 †
Genus Huochengia Zhang, 1981 †
Genus Hupeidiscus Lu, Chang, Chien, Chu et al., 1974 †
Genus Huzhuia Chu, 1965 †
Genus Hybocephalus Remelé, 1885 †
Genus Hydrolaenus Salter, 1867 †
Genus Hyperagnostus Kobayashi, 1955 †
Genus Hystricuraspis Ivshin in Borukaev, 1955 †
Genus Iberocoryphe Hammann, 1977 †
Genus Ichangolithus Lu, 1963 †
Genus Ichiyamella Kobayashi & Hamada, 1986 †
Genus Idiorhapha Whittington, 1953 †
Genus Idioura Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Iduia Sun, 1977 †
Genus Ijacephalus Ogienko in Ogienko, Byalyi & Kolosnitsyna, 1974 †
Genus Illaenoscutellum Kobayashi & Hamada, 1974 †
Genus Incisifex Dahmer, 1937 †
Genus Inexpectatops Basse, 2003 †
Genus Inglefeldia Repina †
Genus Inikanella Lermontova, 1960 †
Genus Inkouia Chang & Fan, 1960 †
Genus Inosacotes Öpik, 1975 †
Genus Iranochuangia Kobayashi, 1960 †
Genus Irbitaspis Korobeinikova, 1974 †
Genus Irinia Egorova & Savitsky, 1968 †
Genus Irvingella Walcott, 1924 †
Genus Irvingellina Kobayashi, 1938 †
Genus Irvinsella †
Genus Isabelinia Rabano, 1989 †
Genus Isalauxina Maksimova, 1962 †
Genus Ishpella Petrunina, 1990 †
Genus Ishpella Petrunina in Petrunina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 †
Genus Isidreana Rusconi, 1954 †
Genus Isidrella Rusconi, 1955 †
Genus Isoctomesa Rafinesque, 1831 †
Genus Issafenia Hupé, 1960 †
Genus Issafeniella Geyer, 1990 †
Genus Isyrakella Rosova in Rosova, Rosov & Dubatolova, 1985 †
Genus Itcheriella Ogienko, 1969 †
Genus Iveria Shergold, 1980 †
Genus Iwayaspis Kobayashi, 1960 †
Genus Iwayaspis Kobayashi, 1962 †
Genus Ixalichnus Callison, 1970 †
Genus Izarnia Feist, 1974 †
Genus Jakutus Lermontova, 1951 †
Genus Jalonella Hupé, 1953 †
Genus Jangudaspis Ogienko, 1956 †
Genus Jangudina Koptev in Korobeinikov, 1965 †
Genus Japonoscutellum Pribyl & Vanek, 1972 †
Genus Jaskovitchella Repina in Repina et al., 1975 †
Genus Jaylopygiella Basse, 2003 †
Genus Jemtella Thorslund, 1940 †
Genus Jiagouia Qiu, 1983 †
Genus Jialaopsis Lu, Chang, Chien, Chu et al., 1974 †
Genus Jianchangia Guo & An, 1982 †
Genus Jiangxiaspis Zhang, 1983 †
Genus Jianxilithus Zhang & Zhou in Lu, Chu, Chien et al., 1976 †
Genus Jiawangaspis Zhang, 1983 †
Genus Jimaoshania Qiu, 1983 †
Genus Jingheella Xiang & Zhang, 1984 †
Genus Jingxiania Chien in Lu, Chu, Chien et al., 1974 †
Genus Jinnania Lin & Wu in Zhang, Lin, Wu & Yuan, 1980 †
Genus Jinshaella Yin, 1978 †
Genus Jiubaspis Zhou & Yin, 1978 †
Genus Jiubaspis Zhou & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Jiumenia Yuan in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Jiuquania Li in Zhou, Li & Qu, 1982 †
Genus Jiuxiella Liu, 1977 †
Genus Johoaspis Lazarenko, 1959 †
Genus Jonotus Meyer, 1848 †
Genus Josina Lochman & Hu, 1960 †
Genus Jubileia Kobayashi, 1938 †
Genus Jucundaspis Repina, 1980 †
Genus Judaiella Lermontova, 1951 †
Genus Judomia Lermontova in Dzevanovsky, 1943 †
Genus Judomiella Lazarenko, 1962 †
Genus Juliaspis Semashko, 1969 †
Genus Junggarella Hsiang & Zhang, 1981 †
Genus Juraspis Egorova in Savitsky et al., 1972 †
Genus Juriietella Jegorova in Astashkin, Varlamov, Egorova & Shabanov, 1981 †
Genus Kablikia Geinitz, 1862 †
Genus Kabutocrania Kobayashi, 1960 †
Genus Kailiella Lu, Chang, Chien, Chu et al., 1974 †
Genus Kainelloides Lisogor, 1974 †
Genus Kainelloides Lisogor, 1977 †
Genus Kaipingella Kuo, 1965 †
Genus Kaltatina †
Genus Kameschkoviella Repina in Zhuravleva & Repina, 1959 †
Genus Kameschkowiella Repina, 1960 †
Genus Kamlacus Petrunina in Petranina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 †
Genus Kaniniella Sivov in Khalfin, 1955 †
Genus Kanlingia Zhang, 1981 †
Genus Karagandoides Ivshin, 1983 †
Genus Karakolia Chernysheva in Zhuravleva, Repina & Khomentovsky, 1959 †
Genus Karlia Walcott, 1888 †
Genus Kasachaspis Ivshin in Borukaev, 1955 †
Genus Katunia Romanenko & Romanenko, 1962 †
Genus Katunicare Romanenko in Romanenko & Romanenko, 1967 †
Genus Kazellina Sivov in Khalfin, 1955 †
Genus Kegelops Alberti, 1970 †
Genus Keidelaspis Harrington, 1937 †
Genus Keidelia Harrington & Leanza, 1957 †
Genus Kerberodiscus Bassett, Owens & Rushton, 1976 †
Genus Kerbinella Jegorova in Egorova, 1984 †
Genus Kerfornella Henry, 1976 †
Genus Kermanella Wolfart, 1974 †
Genus Ketyna Rozova, 1963 †
Genus Keveaspis †
Genus Kielanella Apollonov, 1974 †
Genus Kielania Apollonov, 1968 †
Genus Kildiniella Lermontova in Yavorsky, 1940 †
Genus Kilmahogia Lamont, 1975 †
Genus Kindblandia Frederickson, 1948 †
Genus Kingstonella Rozova, 1960 †
Genus Kingstonioides Rasetti, 1963 †
Genus Kiokella Kobayashi, 1942 †
Genus Kirengina Ogienko in Ogienko, Byalyi & Kolosnitsyna, 1974 †
Genus Kiskinella Romanenko & Romanenko, 1962 †
Genus Kitatagnostus Ergaliev, 1965 †
Genus Kitatella Petrunina, 1960 †
Genus Klabavia Pribyl & Vanek, 1969 †
Genus Kllmaxocephalus Sun & Zhu, 1977 †
Genus Knechtelia Lochman, 1950 †
Genus Koataia Lee, 1962 †
Genus Kobayashella Ivshin, 1983 †
Genus Kochiellina Palmer & Halley, 1979 †
Genus Koenigia Salter, 1865 †
Genus Kolbinella Repina, 1960 †
Genus Kolbinia Koptev, 1962 †
Genus Koldinia Walcott & Resser, 1928 †
Genus Koldiniella Sivova in Khalfin, 1955 †
Genus Koljumbina Lazarenko, 1960 †
Genus Kolpura Resser & Endo in Kobayashi, 1935 †
Genus Kontrastina Rozova, 1964 †
Genus Koobonnia Tomashpol'skaya in Bognibova, 1965 †
Genus Koorthis †
Genus Kootenina Fedyanina, 1962 †
Genus Koraipsis Kobayashi, 1934 †
Genus Korolevium Pribyl & Vanek in Pribyl, Vanek & Pek, 1985 †
Genus Koshkulaspis Koptev, 1969 †
Genus Kosovoproteus Snajdr, 1981 †
Genus Kotuia Kobayashi, 1944 †
Genus Kozlowskiaspis Branisa & Vanek, 1973 †
Genus Krambedrysia Hahn, Hahn & Brauckmann, 1992 †
Genus Krohbole Kobayashi & Hamada, 1972 †
Genus Krolina Repina, 1960 †
Genus Kuetsingocephalus Lee & Wang, 1963 †
Genus Kujandina †
Genus Kuljumbina Lazarenko, 1960 †
Genus Kulmogriffithides Hahn, Hahn & Brauckmann, 1983 †
Genus Kulyumbopeltis Rozova, 1968 †
Genus Kulyumbopeltus †
Genus Kunmingaspis †
Genus Kunshanagnostus Qian & Zhou, 1984 †
Genus Kunshanaspis Zhang & Zhou, 1985 †
Genus Kupwaria Shah & Sudan, 1983 †
Genus Kuraspis Chernysheva, 1960 †
Genus Kuraspis Chernysheva in Petrakov, 1959 †
Genus Kuruktagaspis Zhang, 1981 †
Genus Kuruktagella Zhang, 1981 †
Genus Kushanopyge Chu, 1959 †
Genus Kutsingocephalus Lee & Wang, 1963 † accepted as Kuetsingocephalus Lee & Wang, 1963 †
Genus Kütsingocephalus Lee & Wang, 1963 † accepted as Kuetsingocephalus Lee & Wang, 1963 †
Genus Kweichowilla †
Genus Kymataspis Geyer, 1990 †
Genus Labiostrella Rozova, 1964 †
Genus Labradorina Ivshin, 1978 †
Genus Ladadiscus Pokrovskaya, 1959 †
Genus Ladeuxia Pillet, 1969 †
Genus Laevibole Brauckmann, 1982 †
Genus Lajishanaspis Chu, 1979 †
Genus Lakella Kobayashi, 1962 †
Genus Lakiestrella †
Genus Lamanskytes Balashova, 1966 †
Genus Langgonia Kobayashi & Hamada, 1971 †
Genus Langqia Yin, 1978 †
Genus Languedopeltis Pillet, 1988 †
Genus Lateuloma Dean, 1973 †
Genus Latibole Hahn & Hahn, 1969 †
Genus Laticephalus Pokrovskaya, 1959 †
Genus Laticoryphe Erben, 1966 †
Genus Latikingaspis Geyer, 1990 †
Genus Latilorenzella Kobayashi, 1960 †
Genus Latipalaeolenus Guo & An, 1982 †
Genus Latoucheia Hupé, 1953 †
Genus Lazarenkiura Rozova, 1977 †
Genus Lecanoaspis Ivshin, 1983 †
Genus Leiaspis Wu & Lin in Zhang, Lin, Wu & Yuan, 1980 †
Genus Leichneyella Öpik, 1967 †
Genus Leichuangia Chang, 1963 †
Genus Leiostegioides Kobayashi, 1934 †
Genus Lenadiscus Repina in Khomentovskii & Repina, 1965 †
Genus Lenagraulos Egorova in Egorova, Shabanov et al., 1976 †
Genus Leocephalus Ivshin, 1983 †
Genus Lepidocephaloides Repina in Repina et al., 1964 †
Genus Lepidoderma Reuss, 1855 †
Genus Leptagnostus Lu & Lin, 1989 †
Genus Leptochuangia Lu & Qian, 1983 †
Genus Leptopilus Raymond, 1924 †
Genus Lermontoviella Pokrovskaya, 1959 †
Genus Letniites Rozova, 1977 †
Genus Levinia Rusconi, 1950 †
Genus Levirobergia Petrunina in Petrunina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 †
Genus Levisia Walcott, 1911 †
Genus Liangshanaspis Chang, 1974 †
Genus Liangshandiscus Zhang in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Liangshanocephalus Chen in Li, Song, Zhou, Yang et al., 1975 †
Genus Liaoningaspis Chu, 1959 †
Genus Liaotropis Schrank, 1975 †
Genus Liaotungia Resser & Endo in Kobayashi, 1935 †
Genus Liaoyangaspis Chang, 1959 †
Genus Liaoyangaspis Chang, 1957 † accepted as Liaoyangaspis Chang, 1959 †
Genus Ligometopus Delo, 1938 †
Genus Ligometopus Delo, 1940 †
Genus Limataceps Repina, 1969 †
Genus Limbocalymene Maksimova, 1978 †
Genus Lingucephalichas Phleger, 1936 †
Genus Liocephalus Grönwall, 1902 †
Genus Liparges Gürich, 1901 †
Genus Liquania Zhou in Zhou, Li & Qu, 1982 †
Genus Liriamnica Shergold, 1980 †
Genus Lisogoraspis Apollonov, 1974 †
Genus Lispagnostus Öpik, 1967 †
Genus Litagnostoides Schrank, 1975 †
Genus Litocodia Resser, 1938 †
Genus Litotix Lane & Thomas in Thomas, 1978 †
Genus Lobocephalus Růžička, 1940 † accepted as Ruzickaia Pribyl, 1951 †
Genus Lochmanaspis Ivshin, 1983 †
Genus Lochmannia Grabau, 1937 †
Genus Lodenicia Prantl & Vanek, 1958 †
Genus Lohanpopsis Lu, 1965 †
Genus Lomsucaspis †
Genus Lonchinouyia Chang, 1963 †
Genus Lonchobasilicus Zhou in Chen, Zhou, Zou, Lin, Yang, Li, Qi, Wang, Xu & Zhu, 1980 †
Genus Lonchopygella Xiang in Sun & Xiang, 1979 †
Genus Lonchopygella Hsiang MS., 1977 †
Genus Longicoryphe Erben, 1966 †
Genus Longshania Zhou in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Loparella Rozova, 1968 †
Genus Lopeuloma Rozova, 1968 †
Genus Lophodesella Wu & Lin in Zhang, Lin, Wu & Yuan, 1980 †
Genus Lopnorites Troedsson, 1937 †
Genus Loriella Fedyanina in Bognibova, Koptev et al., 1971 †
Genus Loshanella †
Genus Loshanella Lu, 1959 †
Genus Lotosoides Shergold, 1975 †
Genus Lotzeia Sdzuy, 1958 †
Genus Loulania Zhang, 1981 †
Genus Lowtheria Pribyl & Vanek, 1981 †
Genus Loxonepea Öpik, 1970 †
Genus Loxoparia Rasetti, 1965 †
Genus Loxopeltis Rasetti, 1957 †
Genus Luia Chang, 1957 †
Genus Luia Chang, 1959 †
Genus Lulongia Zhou & Zhang, 1978 †
Genus Lunolenus Sdzuy, 1959 †
Genus Luojiashania Chang, 1974 †
Genus Luotuolingia Lu & Qian, 1983 †
Genus Lusampa Petrunina in Petrunina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 †
Genus Macnairides Lamont, 1975 †
Genus Macrobole Richter, 1951 †
Genus Macroculites Kobayashi, 1955 †
Genus Macrogrammus Whittard, 1966 †
Genus Madaoyuites Liu, 1977 †
Genus Madiganaspis Laurie, 2006 †
Genus Maduiya Rozova, 1963 †
Genus Maja Lomovitskaya in Khalfin, 1955 †
Genus Makaspis Baldis & Hansen, 1980 †
Genus Makbelaspis Lisogor, 1977 †
Genus Makbelaspis Lisogor, 1974 †
Genus Makromuktis Phleger, 1936 †
Genus Malayaproetus Kobayashi & Hamada, 1971 †
Genus Malchi Engel & Morris, 1994 †
Genus Malimanaspis Baldis & Longobucco, 1979 †
Genus Malvernocare Pribyl & Vanek, 1978 †
Genus Malvinocooperella Lieberman, 1993 †
Genus Manailina Bognibova in Bognibova, Koptev et al., 1971 †
Genus Manaspis Repina, 1960 †
Genus Manitouella Berg & Ross, 1959 †
Genus Mannschreckia †
Genus Mannschreekia Stitt, 1983 †
Genus Mansiella Rozova, 1968 †
Genus Maopingaspis Lin & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Marcaisia †
Genus Marcouella Shaw, 1966 †
Genus Mareda Kobayashi, 1942 †
Genus Marsaisia Hupé, 1952 †
Genus Marsaisia Hupé, 1953 †
Genus Maspakites Lazarenko in Lazarenko & Nikiforov, 1968 †
Genus Maspakites Lazarenko & Datsenko, 1967 †
Genus Matania Rasetti, 1946 †
Genus Mataninella Sivor in Khalfin, 1955 †
Genus Matherellina Kobayashi, 1936 †
Genus Mauraspis Alberti, 1967 †
Genus Mcnairia Deiss, 1939 †
Genus Mecophrys Shergold, 1982 †
Genus Megagnostus Robison, 1994 †
Genus Megagraulos Kobayashi, 1935 †
Genus Megalaspidicus Petrunina in Petrunina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 †
Genus Megaproetus Jell, 1977 †
Genus Megatemnoura Sun, 1977 †
Genus Meisterella Ivshin, 1952 †
Genus Meitanella Lin & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Meitania Yuan, 1978 †
Genus Meitania Yuan in Zhang †
Genus Meitanillaenus Chang, 1974 †
Genus Meitanopsis Lu, 1975 †
Genus Melopetasus Schallreuter, 1979 †
Genus Menairia †
Genus Mendociscus Rusconi, 1950 †
Genus Mendodiscus Rusconi, 1950 †
Genus Mendoparabolina Rusconi, 1951 †
Genus Mendoparobolina † accepted as Mendoparabolina Rusconi, 1951 †
Genus Mendosina Shergold, 1975 †
Genus Meneghinella Boernemann, 1891 †
Genus Meniscocoryphe Ludvigsen, Westrop & Kindle, 1989 †
Genus Meridioscutellum Feist, 1970 †
Genus Meropalla Öpik, 1967 †
Genus Mesagnostus Jaekel, 1909 †
Genus Mesocrepicephalus Kobayashi, 1935 †
Genus Mesoctenopyge Henningsmoen, 1957 †
Genus Mesodema Whitehouse, 1939 †
Genus Mesopagetia Kobayashi, 1943 †
Genus Mesospheniscus Hawle & Corda, 1847 †
Genus Metaacidaspis Qiu, 1984 †
Genus Metabalangia Qian & Yuan in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Metadiscus Kobayashi, 1943 †
Genus Metagnostus Jaekel, 1909 †
Genus Metagraulos Kobayashi, 1935 †
Genus Metaharpides Pillet & Courtessole, 1980 †
Genus Metahypagnostus Qiu, 1983 †
Genus Metalioparella Qian & Qiu, 1983 †
Genus Metalonchodomas Kobayashi & Hamada, 1971 †
Genus Metanomocarella Chang, 1957 †
Genus Metanomocarella Chang, 1959 †
Genus Metaphillipsia Reed, 1943 †
Genus Metapteles Rafinesque, 1832 †
Genus Metaptychopyge Balashova, 1964 †
Genus Metaredlichioides Lu, Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974 †
Genus Metashantungia Chang, 1957 †
Genus Metisella Rasetti, 1963 †
Genus Metisia Resser, 1937 †
Genus Metoptogyrus Raymond, 1937 †
Genus Miaeuloma Lu & Chien, 1978 †
Genus Miagnostus Jaekel, 1909 †
Genus Mial Lamont, 1975 †
Genus Mianxiandiscus Zhang & Zhu in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Mianxianella Zhang & Lin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Micangshania Zhou in Li, Song, Zhou, Yang et al., 1975 †
Genus Michaspis Egorova & Savitsky, 1968 †
Genus Micragraulos Howell, 1937 †
Genus Microphthalmus Gortani, 1907 †
Genus Micropyge Hawle & Corda, 1847 †
Genus Milaspis Sivov, 1960 †
Genus Milesdavis Lieberman, 1994 †
Genus Mimana Kobayashi, 1935 †
Genus Mimocryphaeus Gandl, 1972 †
Genus Mindycrusta Öpik, 1967 †
Genus Minusinella Repina, 1960 †
Genus Mioeuloma Lu & Qian, MS. †
Genus Miquelina Thoral, 1935 †
Genus Miranella Pokrovskaya, 1960 †
Genus Mirmor Lamont, 1978 †
Genus Mirops Snajdr, 1987 †
Genus Modicia Walcott, 1924 †
Genus Mohicana Cobbold, 1910 †
Genus Mollisonia Walcott, 1912 †
Genus Monadella Barrande, 1847 †
Genus Monadina Barrande, 1846 †
Genus Monanocephalus Lin & Wu in Zhang, Lin, Wu & Yuan, 1980 †
Genus Monella Bates, 1968 †
Genus Monoculites Martin, 1809 †
Genus Monopsites Green in Rafinesque, 1832 †
Genus Monosulcatina Rozova, 1963 †
Genus Moosia Walcott, 1924 †
Genus Moretaeva Hupé, 1960 †
Genus Moretarva †
Genus Mrassina Repina in Repina, Khomentovskii et al., 1964 †
Genus Muchattelina †
Genus Muchattellina Repina in Khomentovsky & Repina, 1965 †
Genus Mufushania Lin, 1965 †
Genus Mulciberaspis Vanek, Vokac & Horbinger, 1992 †
Genus Munagnostus †
Genus Mungyongia Kobayashi, 1961 †
Genus Munija Khramova, 1980 †
Genus Murphycops Lesperance, 1968 †
Genus Myona Kobayashi, 1935 †
Genus Myoproetus Maksimova, 1978 †
Genus Myopsomicmacca Hupé, 1953 †
Genus Myopsostrenua Rushton, 1966 †
Genus Mytocephala Struve, 1958 †
Genus Namanoia Lermontova, 1951 †
Genus Namanoiella Tomashpol'skaya in Bognibova, 1965 †
Genus Namiolenoides Rusconi, 1952 †
Genus Namuraspis Gandl, 1980 †
Genus Nandanaspis Chang & Yin, 1978 †
Genus Nangaocephalus Yuan in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Nangaoia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974 †
Genus Nangaops Yuan & Sun in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Nankinolithus P'an, 1956 †
Genus Nannopeltis Harrington & Leanza, 1957 †
Genus Nanoqia Poulsen, 1964 †
Genus Natatoraspis Pribyl, 1967 †
Genus Nathorstia Walcott, 1912 †
Genus Nattainia Vogdes, 1925 †
Genus Nehanniaspis Fritz, 1972 †
Genus Neilsoniella Lamont, 1975 †
Genus Neimonggolaspis Zhang & Liu, 1991 †
Genus Nelgakia Egorova & Pegel, 1979 †
Genus Nellina Pokrovskaya in Zhuravleva, Zadorozhnaya et al., 1967 †
Genus Neoaldanaspis Rozova †
Genus Neoblackwelderiella Sun in Grabau, 1937 †
Genus Neocheiruroides Yin, 1978 †
Genus Neophillipsia Gheyselinck, 1937 †
Genus Neopoliellina Repina in Repina, Khomentovskii et al., 1964 †
Genus Neoproetus Kobayashi & Hamada, 1979 †
Genus Neopsilocephalina Yin, 1978 †
Genus Neoredlichia Hupé, 1952 †
Genus Neoredlichina Fedyanina, 1962 †
Genus Neoscutellum Maksimova, 1978 †
Genus Neosynphoria Pillet, 1954 †
Genus Neptunagnostella Pek, 1977 †
Genus Nericella Rozova, 1964 †
Genus Nerudaspis Pribyl & Vanek, 1965 †
Genus Nganasanella Rozova, 1963 †
Genus Nicoljarvius Lamont, 1975 †
Genus Nilegna Öpik, 1967 †
Genus Ninaspis Ivshin, 1953 †
Genus Ningkianites Lu, 1975 †
Genus Ninglangia Lu in Lu, Chu, Chien et al., 1976 †
Genus Ningnanaspis Sheng, 1974 †
Genus Nitidulopyge Pribyl & Erben, 1952 †
Genus Niuchangella Chang, 1974 †
Genus Nodiphillipsia Kobayashi & Hamada, 1984 †
Genus Norasaphites Fortey & Shergold, 1984 †
Genus Norasaphus Fortey & Shergold, 1984 †
Genus Norina †
Genus Norwoodina Lochman, 1940 †
Genus Notacoosia Jago & Bentley, 2007 †
Genus Notaiella Ogienko in Ogienko, Byalyi & Kolosnitsyna, 1974 †
Genus Novakaspis Pribyl, 1946 †
Genus Novákaspis Pribyl, 1946 † accepted as Novakaspis Pribyl, 1946 †
Genus Nuttainia Eaton, 1832 †
Genus Nyaya Rozova, 1963 †
Genus Nyterops Struve, 1972 †
Genus Obelagnostus Shergold & Webers, 1992 †
Genus Oculagnostus Ahlberg, 1988 †
Genus Odontopyge Hawle & Corda, 1847 †
Genus Ogmocnemis Kielan, 1960 †
Genus Ogygitella Harrington & Leanza, 1957 †
Genus Oidalaproetus Wu, 1977 †
Genus Oirotella Romanenko, 1972 †
Genus Ojrotella †
Genus Okunevaella Repina in Okuneva & Repina, 1973 †
Genus Olegaspis Ivshin, 1983 †
Genus Olenophalus Tomashpol'skaya in Bognibova, 1965 †
Genus Olgaspis Korobeinikova in Kraevsky, 1965 †
Genus Olinaspis Suvorova, 1964 †
Genus Omegops Struve, 1976 †
Genus Omeishania Sun in Grabau, 1937 †
Genus Onchaspis Raymond, 1925 †
Genus Onchocephalites Tomaspol'skaya in Bognibova, 1965 †
Genus Oncholichas Schmidt, 1885 †
Genus Onchonetus †
Genus Onchonotopsis Rasetti, 1946 †
Genus Onchonotus Raymond, 1924 †
Genus Oncolichas Bergroth, 1905 †
Genus Onicites Martin, 1809 †
Genus Oniscites Martin, 1809 †
Genus Ontoella Chernysheva, 1961 †
Genus Onukia Kobayashi & Hamada, 1976 †
Genus Onychaspis Raymond, 1925 †
Genus Opsidiscinella Repina, 1965 †
Genus Opsypharus Howells, 1982 †
Genus Ordosaspis Lu in Lu, Chu, Chien et al., 1976 †
Genus Oreadella Shergold, 1975 †
Genus Orictocara †
Genus Orientella Repina & Okuneva, 1969 †
Genus Orienturum Repina in Okuneva & Repina, 1973 †
Genus Orienturus Repina in Okuneva & Repina, 1973 †
Genus Orkekeia Rusconi, 1955 †
Genus Orkekia †
Genus Orloviella Sivov in Khalfin, 1955 †
Genus Ormistonaspis Pribyl & Vanek, 1978 †
Genus Ormistonia Maksimova, 1978 †
Genus Orthodorsum Nan & Chang, 1982 †
Genus Oryctocarella Tomashpolskaya in Tomashpolskaya & Karpinsky, 1961 †
Genus Oryctocephaloides Yuan in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Oryctocephaloides Chien & Yuan, 1978 †
Genus Osceolina Ulrich in Ulrich & Resser, 1930 †
Genus Otarionella Koroleva, 1977 †
Genus Otarionellina Koroleva, 1978 †
Genus Otekmaspis †
Genus Otenaspella †
Genus Ottoaspis Vanek, Vokac & Horbinger, 1992 †
Genus Ourikaia Geyer, 1990 †
Genus Ovalagnostus Lu in Lu, Chu, Chien et al., 1974 †
Genus Owensella Pribyl & Vanek, 1978 †
Genus Pachyaspidella Semashko in Bognibova, Koptev et al., 1971 †
Genus Pacootasaukia Sohn & Choi, 2005 †
Genus Pagetina Lermontova, 1940 †
Genus Pagodioides Zhu & Wittke, 1989 †
Genus Pagometopus Henningsmoen, 1959 †
Genus Pagura Emmons, 1860 †
Genus Paichiashania †
Genus Palaeocrepicephalus Kobayashi, 1935 †
Genus Palaeoharpes Lu & Chien, 1978 †
Genus Palaeoharpes Lu & Qian, MS. †
Genus Palaeolenella Repina, 1960 †
Genus Palaeolentus †
Genus Palaeophyllipsia Sugiyama & Okano, 1944 †
Genus Palaeopyge Salter, 1856 †
Genus Paleodechenella Maksimova, 1970 †
Genus Paleoenoides †
Genus Paleooryctocephalus Repina in Repina, Khomentovskii et al., 1964 †
Genus Palmeraspis Repina in Okuneva & Repina, 1973 †
Genus Palquiella Suarez-Soruco, 1975 †
Genus Pamiritellus †
Genus Pamirotchechites Balashova, 1966 †
Genus Pamphyliaspis Dean, 2005 †
Genus Panarchaeogonus Öpik, 1937 †
Genus Paraacidaspis Poletaeva, 1956 †
Genus Paraantagmus Qiu, 1980 †
Genus Paraaojia Rosova in Lisogor, Rozov & Rozova, 1988 †
Genus Paraaulacopleura Chaubet, 1937 †
Genus Parabolinina Lazarenko, 1966 †
Genus Parabriscoia Kobayashi, 1935 †
Genus Parabulbaspis Zhang, 1981 †
Genus Parabumastides Ji, 1987 †
Genus Paracalvinella Zhou in Zhou & Zheng, 1980 †
Genus Paracalymene Fillet, 1968 †
Genus Paraceratopyge Balashova, 1967 †
Genus Parachangshania Chien, 1958 †
Genus Paracheiruroides Repina in Okuneva & Repina, 1973 †
Genus Parachittidilla Lin & Wu in Zhang, Lin, Wu & Yuan, 1980 †
Genus Paracidaspis †
Genus Paracolpocoryphe Hupe in Destombes & Jeanette, 1966 †
Genus Paracolpocoryphe Destombes, Hupe & Jeannette, 1959 †
Genus Paracrepicephalus Lochman, 1936 †
Genus Paradalmanites Pillet, 1954 †
Genus Paradionide Chang & Fan, 1960 †
Genus Paradiscus Kobayashi, 1943 †
Genus Paradistazeris Zhu in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Paradrepanuroides Zhao, Huang & Mao in Zhao, Mao, Huang & Liu, 1984 †
Genus Paraencrinurus Antelo, 1973 †
Genus Paraerbia Repina, 1958 †
Genus Paraeremiproetus Pillet, 1973 †
Genus Parafallotaspis Fritz, 1972 †
Genus Parafuchouia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974 †
Genus Paragetia †
Genus Paragnostus Jaekel, 1909 †
Genus Paragraulos Lu, 1941 †
Genus Paragunnia Qiu, 1983 †
Genus Paraharpides Pillet & Courtessole, 1980 †
Genus Parahawleia Zhou in Lu, Chu et al., 1976 †
Genus Parahiolites Kobayashi, 1967 †
Genus Parainouyia Lin & Wu in Zhang, Lin, Wu & Yuan, 1980 †
Genus Parajialaopsis Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Parakailia Wu, 1979 †
Genus Parakainella Kobayashi, 1953 †
Genus Parakaolishania Sun in Sun & Xiang, 1979 †
Genus Parakingaspidoides Hupé, 1960 †
Genus Paraklodinioidia Endo, 1937 †
Genus Parakoldinia Rozova, 1960 †
Genus Parakomaspis Chu, 1960 †
Genus Parakotuia Chu, 1960 †
Genus Paralardeuxia Pillet, 1973 †
Genus Paraleiolichas Kobayashi & Hamada, 1987 †
Genus Paraleiostegium Chu & Zhang, 1979 †
Genus Paralepidoproetus Alberti, 1981 †
Genus Paraleptoredlichia Qiu, 1980 †
Genus Paraliaoningaspis Chu in Lu, Chang et al., 1965 †
Genus Parallehelcura Yang & Wang, 1991 †
Genus Paramaladioidella Lu & Zhu, 1980 †
Genus Paramecephalus Zhou & Yin, MS. †
Genus Paramecephalus Zhou & Yin, 1978 †
Genus Paramecephalus Zhou & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Paramenocephalites Kobayashi, 1960 †
Genus Paramenomonia Chu, 1959 †
Genus Paramicroparia Zhang, 1981 †
Genus Paramphoton Yang, MS †
Genus Paramphoton Yang, 1978 †
Genus Parampyx Zhang, 1981 †
Genus Paranileus Kobayashi, 1951 †
Genus Paranomocare Lee & Yin, 1973 †
Genus Paranomocarella Yang, 1978 †
Genus Paranomocarella Yang, MS †
Genus Paraojia Sun & Zhu, 1977 †
Genus Paraonychopyge Pillet, 1974 †
Genus Paraoryctocephalops Tomashpolskaya in Tomashpolskaya & Karpinsky, 1961 †
Genus Paraoryctocephalops Tomashpol'skaya, 1960 †
Genus Paraoryctocephalus Tomashpolskaya in Tomashpolskaya & Karpinsky, 1961 †
Genus Parapalpebralia Erben in Pillet, 1959 †
Genus Parapalpebralia Pillet, 1973 †
Genus Paraphelaspis Rasetti, 1965 †
Genus Paraphoreotropis Shaw in Clark & Shaw, 1968 †
Genus Paraphorocephala Li & Xiao, 1984 †
Genus Paraplagiura Zhang, 1983 †
Genus Paraplesiagraulos Qiu, 1983 †
Genus Paraplesiograulos †
Genus Paraplicatolina Benedetto, 1979 †
Genus Parapliomera Maksimova, 1962 †
Genus Paraporilorenzella Qiu, 1983 †
Genus Paraproetus Kobayashi & Hamada, 1979 †
Genus Paraprotolenella Zhu & Jiang, 1981 †
Genus Paraqingshuiheella Lu & Qian, 1984 †
Genus Pararania †
Genus Pararedlichia Hupé, 1952 †
Genus Pararedlichia Hupé, 1953 †
Genus Parasajanaspis Chernysheva, 1972 †
Genus Parashumardia Sun in Sun & Xiang, 1979 †
Genus Parasolenoparia Li in Zhou, Li & Qu, 1982 †
Genus Parasolenopleura Poletaeva in Khalfin, 1955 †
Genus Parasphaerexochus Chugaeva, 1973 †
Genus Parataitzuia Chang, 1963 †
Genus Paratiresias Petrunina in Repina, Petrunina & Khairullina, 1975 †
Genus Paratokephalops †
Genus Paratollaspis Kobayashi, 1944 †
Genus Paratollaspis Kobayashi, 1943 †
Genus Parawuania Zhang, 1983 †
Genus Parawutingaspis Lee, 1978 †
Genus Parayuepingia Zhou in Zhou, Li & Qu, 1982 †
Genus Parazhongtiaoshanaspis Qiu, 1983 †
Genus Paraziboaspis Nan & Chang, 1982 †
Genus Parodiscus Hupé, 1952 †
Genus Parorlovia †
Genus Parvidumus Kobayashi & Hamada, 1980 †
Genus Parvixochus Pribyl & Vanek in Pribyl, Vanek & Pek, 1985 †
Genus Patalolaspis Qian, 1983 †
Genus Pateraspis Prantl & Pribyl, 1947 †
Genus Patomaspis Ogienko in Ogienko, Byalyi & Kolosnitsyna, 1974 †
Genus Patronaspis Ivshin, 1983 †
Genus Pauciella Rozova, 1964 †
Genus Pauliceps Repina in Khomentovsky & Repina, 1965 †
Genus Pearylandia Robison, 1988 †
Genus Pedinaspis Ivshin, 1983 †
Genus Peishanoides Zhang, 1983 †
Genus Peltoma Rafinesque, 1832 †
Genus Penarosa Öpik, 1970 †
Genus Penchiopsis Lu in Lu, Chu, Chien, Zhou, Chen, Liu, Yu, Chen & Xu, 1976 †
Genus Pentacantha Sloan & Laurie, 2004 †
Genus Pentacopyge Zhou, Zhou & Yuan, 2005 †
Genus Pentagonalia Geyer, 1988 †
Genus Peraiella †
Genus Perforina Romanenko in Romanenko & Romanenko, 1967 †
Genus Periallaspis Bruton, 1967 †
Genus Permoproetus Toumansky, 1935 †
Genus Perthiellus Lament, 1975 †
Genus Pesaiina Poletaeva, 1969 †
Genus Petalocephalus Lu & Qian, 1983 †
Genus Petrbokia Pribyl & Vanek, 1965 †
Genus Petruninaspis Ivshin, 1983 †
Genus Peziziopsis Ju, 1983 †
Genus Phalacromina Kobayashi, 1962 †
Genus Phanoptes Hawle & Corda, 1847 †
Genus Pharostomaspis Abdullaev in Abdullaev & Khaletzskaya, 1970 †
Genus Phaseolops Whittington, 1963 †
Genus Phlysacium Hawle & Corda, 1847 †
Genus Phoidagnostoides Capera, Courtessole & Pillet, 1978 †
Genus Phoreotropis Raymond, 1924 †
Genus Phoriotropus †
Genus Phorocephala Lu, 1959 †
Genus Phylacops Cooper & Kindle, 1936 †
Genus Phylacterus Raymond, 1924 †
Genus Phymaspis Poulsen, 1964 †
Genus Pibylia Erben, 1951 †
Genus Pichinturia Rusconi, 1958 †
Genus Pichunia Rusconi, 1958 †
Genus Pichynturia Rusconi, 1958 †
Genus Piedmontia Resser, 1938 †
Genus Pilgrimia Duncan in Lochman & Duncan, 1944 †
Genus Piliolites Cozzens, 1846 †
Genus Pilletopeltis Pribyl in Pillet, 1973 †
Genus Pingluaspis Zhang & Wang, 1986 †
Genus Piriproetoides Alberti, 1981 †
Genus Pisumia Pokrovskaya in Vladimirsky & Zadorozhnaya, 1970 †
Genus Pjatkovaspellus Khairullina, 1973 †
Genus Plagiurella Resser, 1937 †
Genus Plakhinella Lazarenko, 1965 †
Genus Planaspis Repina, 1959 †
Genus Planocephalus Zadorozhnaya in Zhuravleva, Zadorozhnaya et al., 1967 †
Genus Planokaskia Engel & Morris, 1994 †
Genus Planolimbus Geyer, 1990 †
Genus Platagnostus Howell, 1935 †
Genus Plataspella Wilson, 1949 †
Genus Platopolichas Gürich, 1901 †
Genus Platycephalion Boeck, 1828 †
Genus Platylisania Zhang & Jell, 1987 †
Genus Platyptychopyge Xia, 1978 †
Genus Platysaukia Kobayashi, 1960 †
Genus Plebiellus Wu & Lin in Zhang, Lin, Wu & Yuan, 1980 †
Genus Plectrifer Öpik, 1967 †
Genus Plectrocrania Zhang & Yuan in W. Zhang et al., 1980 †
Genus Plesiagraulos Chang, 1963 †
Genus Plesiamecephalus Lin & Qiu, 1983 †
Genus Plesigangderria Qiu, 1983 †
Genus Plesioconvexa Lieberman, 1993 †
Genus Plesioinouyella Qiu, 1983 †
Genus Plesioperiomma Qiu, 1980 †
Genus Plesiowensus Lieberman, 1994 †
Genus Plesiowuania Bi, 1983 †
Genus Plesisolenoparia Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Plethopeltoides Khramova, 1968 †
Genus Pliomeraspis Harrington, 1957 †
Genus Plurinodus Öpik, 1967 †
Genus Plusiarges Gürich, 1901 †
Genus Plutonia Hicks, 1871 †
Genus Poculicephalina Qian in Qian, Li & Zhang, 1986 †
Genus Pokrovskayaspis Khairullina, 1973 †
Genus Poliellaspidella Poletaeva, 1960 †
Genus Politinella Ivshin, 1978 †
Genus Poljakovia Bognibova in Bognibova, Koptev et al., 1971 †
Genus Polyariella Rozova, 1963 †
Genus Polydinotes Öpik, 1975 †
Genus Polyeres Rouault, 1847 †
Genus Polytomurus Hawle & Corda, 1847 †
Genus Ponumia Hu, 1970 †
Genus Popogaia †
Genus Popovkiaspis Balashova, 1966 †
Genus Popovkites Balashova, 1966 †
Genus Porilorenzella Chang, 1963 †
Genus Portlockia M'Coy in Griffith, 1846 †
Genus Poshania Chang, 1957 †
Genus Poshania Chang, 1959 †
Genus Poulsenella Rozova, 1963 †
Genus Poulsenia Resser, 1936 †
Genus Poulseniella Poulsen, 1964 †
Genus Pradoella Mammann, 1977 †
Genus Praecoparia Lochman, 1966 †
Genus Praepatokephalus Lochman, 1964 †
Genus Preconocephalina Pokrovskaya, 1961 †
Genus Preodontochile Degardin & Pillet, 1984 †
Genus Prephacopidella Destombes, 1964 †
Genus Prestalia Eldredge & Branisa in Eldredge & Ormiston, 1979 †
Genus Prestalia Eldredge & Branisa, 1980 †
Genus Priceaspis Legg, 1976 †
Genus Primorinella †
Genus Prismenaspis Henderson, 1976 †
Genus Proaraiopleura Zhang, 1981 †
Genus Proasaphiscina Lin & Wu in Zhang, Lin, Wu & Yuan, 1980 †
Genus Proasaphus Balashova, 1966 †
Genus Proavus Poletaeva, 1972 †
Genus Probilacunaspis Ergaliev, 1980 †
Genus Probilacunaspis Peng, 1990 †
Genus Probowmanops Ju, 1983 †
Genus Procephalops Whittard, 1966 †
Genus Prochangshania Chu, 1960 †
Genus Prodalmanitina Chugaeva in Balashov et al., 1968 †
Genus Prodamesella Chang, 1959 †
Genus Prodamesella Chang, 1957 †
Genus Prodrepanura Sun in Grabau, 1937 †
Genus Proetiella Harrington & Leanza, 1957 †
Genus Profallotaspis Repina in Khomentovsky & Repina, 1965 †
Genus Prohedinaspis Romanenko, 1977 †
Genus Prohedinella Sivov in Khalfin, 1955 †
Genus Proinouyia Qiu, 1980 †
Genus Prolaminurus Tomashpol'skaya in Bognibova, 1965 †
Genus Prolloydia Kobayashi, 1960 †
Genus Prolonchocephalus Palmer in Palmer & Peel, 1981 †
Genus Promenites Rafinesque, 1832 †
Genus Prometeoraspis Poulsen, 1960 †
Genus Proshantungaspis Qiu & Lin, 1983 †
Genus Prosocephalus Campbell, 1977 †
Genus Protaldonaia Sdzuy, 1961 †
Genus Protaldonaia Lotze, 1958 †
Genus Protillaenus Raymond, 1937 †
Genus Protobronteus Snajdr, 1960 †
Genus Protochittidilla Qiu, 1980 †
Genus Protocyphaspides Pribyl & Vanek, 1977 †
Genus Protolichas Reed, 1902 †
Genus Protophillipsinella Chen in Li, Song, Zhou, Yang et al., 1975 †
Genus Protoptychopyge Balashova, 1960 †
Genus Protoryctocara Zhou, 1977 †
Genus Protoscutellum Šnajdr, 1960 †
Genus Protrachoparia Zhang, 1983 †
Genus Protypus Walcott, 1886 †
Genus Proveedoria Lochman, 1948 †
Genus Pruvostinodies Hupé, 1952 †
Genus Pruvostinodies Hupé, 1953 †
Genus Pruvostinodïes Hupé, 1952 † accepted as Pruvostinodies Hupé, 1952 †
Genus Pruvostinodïes Hupé, 1953 † accepted as Pruvostinodies Hupé, 1953 †
Genus Pscemiaspis Abdullaev in Abdullaev & Khaletzskaya, 1970 †
Genus Pseudacrocephalaspina Ergaliev, 1980 †
Genus Pseudalokistocare Repina in Kirichenko, 1965 †
Genus Pseudamphoton Chu & Zhang in Zhang, 1979 †
Genus Pseudartabas Lamong, 1948 †
Genus Pseudasaphus Schmidt, 1907 †
Genus Pseudeugonocare Peng, 1992 †
Genus Pseudoacicaudus †
Genus Pseudoacrocephalites Rosova, 1968 †
Genus Pseudoasiatella Repina in Repina & Romanenko, 1978 †
Genus Pseudobarrandia Courtessole & Fillet, 1976 †
Genus Pseudobasilicoides Balashova, 1971 †
Genus Pseudobasiliella Balashova, 1971 †
Genus Pseudobirmanites Lee, 1978 †
Genus Pseudobollandia Hahn, Hahn & Brauckmann, 1985 †
Genus Pseudoclelandia Ross, 1951 †
Genus Pseudoclelanida †
Genus Pseudocrecephalaspina †
Genus Pseudocrepicephalus Chu & Zhang, 1979 †
Genus Pseudodigonus Pillet, 1961 †
Genus Pseudoeobronteus Maksimova, 1979 †
Genus Pseudoeteraspis Chernysheva in Dzevanovskii & Chernysheva, 1950 †
Genus Pseudofuchouia Zhang, 1981 †
Genus Pseudogriphasaphus Peng, 1992 †
Genus Pseudoinouyina Repina in Musatov, 1965 †
Genus Pseudokadyella Repina, 1966 †
Genus Pseudokoldinella Timokhin, 1988 †
Genus Pseudolevinia Rusconi, 1951 †
Genus Pseudoliostracina Kobayashi, 1938 †
Genus Pseudolisania Kobayashi, 1935 †
Genus Pseudolorenzella Romanenko in Poletaeva & Romanenko, 1970 †
Genus Pseudomonaspis Richter, 1917 †
Genus Pseudonileus Kobayashi, 1951 †
Genus Pseudopaokania Yin, 1978 †
Genus Pseudopetigurus Prantl & Pribyl, 1949 †
Genus Pseudopliomera Lu & Chien, 1978 †
Genus Pseudoprotolenella Zhu & Lin, 1983 †
Genus Pseudoptychopyge Balashova, 1964 †
Genus Pseudoresserops Repina in Khomentovsky & Repina, 1965 †
Genus Pseudorhaptagnostus Lermontova, 1951 †
Genus Pseudosalteria Raymond, 1924 †
Genus Pseudosaukia Rasetti, 1944 †
Genus Pseudosilesiops Hahn, Hahn & Brauckmann, 1994 †
Genus Pseudosolenoparia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974 †
Genus Pseudospatulina Hahn & Hahn, 1968 †
Genus Pseudotaitzuia Qiu, 1983 †
Genus Pseudotalbotina Benedetto, 1979 †
Genus Pseudotermierella Hupé, 1960 †
Genus Pseudowutingaspis Lee, 1978 †
Genus Pseudoyiliangella Yin, 1978 †
Genus Pseudozacanthopsis Repina, 1960 †
Genus Pseudozacantopsis †
Genus Psilocephalops Lu & Chang, 1974 †
Genus Psilostracus Chang, 1963 †
Genus Psiloyuepingia Qian & Qiu, 1983 †
Genus Pterocephalops Lin & Zhang, 1979 †
Genus Pterochuangia Lu & Qian, 1983 †
Genus Pterolichas Gürich, 1901 †
Genus Pterygometopidella Wedekind, 1911 †
Genus Ptychoparellina †
Genus Ptychoparioides Růžička, 1940 †
Genus Ptyctolorenzella Lin & Wu in Zhang, Lin, Wu & Yuan, 1980 †
Genus Ptyttstrigis Hohensee in Hohensee & Stitt, 1989 †
Genus Pulvillaspis Romanenko in Romanenko & Romanenko, 1967 †
Genus Pumilina Repina, 1960 †
Genus Pumilina Repina in Zhuravleva & Repina, 1959 †
Genus Punctaspis Shaw in Clark & Shaw, 1968 †
Genus Punka Fortey, 1979 †
Genus Pusillabole Alberti, 1973 †
Genus Pyraustocranium Ross, 1951 †
Genus Pyrimetopus Pribyl & Vanek, 1980 †
Genus Qiaotouaspis Guo & An, 1982 †
Genus Qijiangia Xiang & Ji, 1987 †
Genus Qilianaspis Lin & Zhang, 1979 †
Genus Qingshuiheella Lu & Qian, 1983 †
Genus Qingshuiheia Nan, 1976 †
Genus Qingzhenaspis Yin, 1978 †
Genus Qu Dürkoop, Mensink & Plodowski, 1967 †
Genus Quadratapyge Zhou, 1977 †
Genus Quadratillaenus Wu, 1987 †
Genus Quadratispina Gandl, 1972 †
Genus Quadrogryphaeus Durkoop, Mensink & Plodowski, 1967 †
Genus Quilianshania Chu, 1960 †
Genus Quilicanella Rusconi, 1952 †
Genus Raaschela Lochman, 1938 †
Genus Rabuloproetus Snajdr, 1977 †
Genus Rabutina Khairullina, 1973 †
Genus Radioscutellum Snajdr, 1972 †
Genus Raduginella Egorova in Nekhoroshev, 1958 †
Genus Randicephalus Ivshin, 1983 †
Genus Raracephalus Repina in Repina, Khomentovskii et al., 1964 †
Genus Rasettaspis Ivshin, 1983 †
Genus Ratinkaspis Pribyl & Vanek, 1977 †
Genus Rawops Hupé, 1953 †
Genus Raymondarges Phleger, 1937 †
Genus Reaganaspis Stitt, 1977 †
Genus Realaspis Sdzuy, 1961 †
Genus Redlichaspis Kobayashi, 1935 †
Genus Reedaspis Prantl & Pribyl, 1949 †
Genus Reedus Dalmatov in Yazmir, Dalmatov & Yazmir, 1975 †
Genus Regina Egorova, 1967 †
Genus Rejkocephalus Kordule, 1990 †
Genus Remacutanger Pribyl & Vanek, 1978 †
Genus Remopleuridioides Harrington & Leanza, 1957 †
Genus Renhuaia Yin, 1978 †
Genus Resimopis †
Genus Resseria Sun in Grabau, 1937 †
Genus Resseria Howell, 1945 †
Genus Resseropsis Hupé, 1960 †
Genus Retamaspis Hammann, 1972 †
Genus Retusites Rafinesque, 1832 †
Genus Reubenella Lochman, 1966 †
Genus Rhamphopyge Kobayashi, 1955 †
Genus Rheingoldium Basse, 2003 †
Genus Rhenium Basse, 2003 †
Genus Rhodope Angelin, 1854 †
Genus Rhyssometopus Öpik, 1967 †
Genus Richardsoniaspis Ivshin in Sivov & Tomashpolskaya, 1958 †
Genus Rina Poletaeva in Rozova, 1964 †
Genus Rinconaspis Baldis & Gonzalez, 1981 †
Genus Rinella Poletaeva & Egorova in Egorova & Savitsky, 1969 †
Genus Riojaia Liñán, 1978 †
Genus Robroyia Lamont, 1975 †
Genus Rochaeva Hupé, 1960 †
Genus Rodingaia Laurie, 2006 †
Genus Rogersvillia Hupé, 1955 †
Genus Rokycania Pribyl & Vanek, 1965 †
Genus Romaniella Eldredge & Branisa in Eldredge & Ormiston, 1979 †
Genus Romanops Eldredge & Branisa, 1980 †
Genus Rongxiella Chang, 1974 †
Genus Rosalia Pospelov & Fedyanina, 1971 †
Genus Rosovaspis Courtessole & Pillet, 1976 †
Genus Rostrifinis Öpik, 1967 †
Genus Rowia Deiss, 1939 †
Genus Ruapyge Wright, 1979 †
Genus Rudagnostus Lermontova, 1951 †
Genus Ruichengaspis Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Ruichengella Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Runnania Lee, 1978 †
Genus Rusichnites Dawson, 1861 †
Genus Ruzickaia Pribyl, 1951 †
Genus Ružickaia Pribyl, 1951 † accepted as Ruzickaia Pribyl, 1951 †
Genus Sachaspis Egorova in Egorova & Savitsky, 1969 †
Genus Sagitaspis Ivshin, 1983 †
Genus Sagitoides Ivshin, 1983 †
Genus Sailoma Schrank, 1975 †
Genus Sailycaspis Repina in Khomentovsky & Repina, 1965 †
Genus Saimixiella Lee, 1978 †
Genus Sajanaspis Repina, 1960 †
Genus Sajanaspis Repina, 1959 †
Genus Salteria Walcott, 1884 †
Genus Sanashtycgolia Poletaeva in Zhuravleva & Repina, 1959 †
Genus Sanashtykgolia †
Genus Sanbernardaspis Acenolaza, 1973 †
Genus Sanduhedinaspis Yin, 1978 †
Genus Sanduspis Chien, 1961 †
Genus Sanhuangshania Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974 †
Genus Sanwania Yuan in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Saouraspis Thoral †
Genus Sarkia Koucek, 1919 †
Genus Sárkia Koucek, 1919 † accepted as Sarkia Koucek, 1919 †
Genus Satpaevella Ivshin in Borukaev & Ivshin, 1965 †
Genus Sayanella Pokrovskaya, 1959 †
Genus Schaderthalaspis Alberti, 1983 †
Genus Schaderthalis Hundt, 1931 †
Genus Schismagnostus Robison, 1994 †
Genus Schizophorus Balashova, 1953 †
Genus Schmidtaspis Kobayashi, 1944 †
Genus Schmidtia Moberg, 1899 †
Genus Schoriecare Rozova, 1964 †
Genus Schoriella Sivov in Khalfin, 1955 †
Genus Schoriina Fedyanina in Bognibova, 1971 †
Genus Schoriina Fedyanina in Bognibova & Shcheglov, 1970 †
Genus Schyilaspis Ivshin, 1983 †
Genus Scotoproetus Lamont, 1978 †
Genus Sculptaspis Nikolaisen, 1982 †
Genus Sdzuyella Khairullina in Repina, Petrunina & Khairullina, 1975 †
Genus Sectigena Geyer, 1990 †
Genus Segmentagnostus Pek, 1977 †
Genus Sekwiaspis Fritz, 1972 †
Genus Selenopleura Angelin, 1868 †
Genus Selenoptychus Hawle & Corda, 1847 †
Genus Selenosema Hawle & Corda, 1847 †
Genus Selenosoma Zittel, 1885 †
Genus Seletella Ivshin, 1983 †
Genus Seletoides Ivshin, 1983 †
Genus Semicyclocephalus Ivshin, 1952 †
Genus Semisphaerocephalus Ivshin, 1952 †
Genus Semnocephalus Resser, 1942 †
Genus Senticucullus Xia, MS in Chang, 1974 †
Genus Septidenta Maksimova, 1975 †
Genus Septimopeltis Pribyl & Vanek, 1972 †
Genus Serksia Hupé, 1960 †
Genus Serksioides Hupé, 1960 †
Genus Serracaris Briggs, 1978 †
Genus Severina Egorova & Savitsky, 1969 †
Genus Shanchengziella Lu & Qian, 1983 †
Genus Shanganella Pokrovskaya, 1959 †
Genus Shantungaspis Chang, 1957 †
Genus Shanxiella Lin & Wu in Zhang, Lin, Wu & Yuan, 1980 †
Genus Shergoldia Zhang & Jell, 1987 †
Genus Shihuigonia Chu, 1960 †
Genus Shihuigouia Chu, 1960 †
Genus Shilengshuia Zhou & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Shilengshuia Zhou & Yin, 1978 †
Genus Shipaiella Zhang & Qian in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Shitaia Qian & Zhang, 1983 †
Genus Shizhudiscus Zhang & Zhu in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Shuiyuella Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Shumardella Pribyl & Vanek, 1980 †
Genus Siberoproetus Pribyl, 1970 †
Genus Sibiriaspis Repina, 1960 †
Genus Sibiriopeltis Petrunina in Petrunina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 †
Genus Sibiriopleura †
Genus Siciliproetus Kobayashi & Hamada, 1980 †
Genus Silesiops Chlupac, 1966 †
Genus Siligirites Pokrovskaya, 1961 †
Genus Siligirites Pokrovskaya, 1972 †
Genus Sinijanella Repina in Khomentovsky & Repina, 1965 †
Genus Sinolenus Kobayashi, 1944 †
Genus Sinoluia Li, 1987 †
Genus Sinomegalaspis Qu in Zhou, Li & Qu, 1982 †
Genus Sinopaladin Li & Yuan, 1994 †
Genus Sinoproceratopyge Lu & Lin, 1980 †
Genus Sivovella Poletaeva, 1967 †
Genus Skelipyx Lane, 1971 †
Genus Slimanella Pribyl & Vanek, 1978 †
Genus Smeathenia Dean, 1960 †
Genus Sneedvillia Resser, 1938 †
Genus Snoderaspis Ramsköld, 1984 †
Genus Sobovaspis Dean, 1973 †
Genus Sohopleura Jago & Webers, 1992 †
Genus Sokoliops Bursky in Bondarev et al., 1970 †
Genus Solenagnostus Whitehouse, 1936 †
Genus Solenaspis Koptev, 1962 †
Genus Solenoparina Chang, 1963 †
Genus Solenoparops Chang, 1963 †
Genus Solontzella Repina, 1960 †
Genus Solontzella Repina, 1959 †
Genus Somatrikelon McMurtrie, 1819 †
Genus Sonoraspis Stoyanow, 1952 †
Genus Spergenaspis Brezinski, 1987 †
Genus Sphaerocare Harrington & Leanza, 1957 †
Genus Spinacephalus Stitt, 1970 †
Genus Spinillaenus Xia, 1978 †
Genus Spinimetopus Hahn & Hahn, 1985 †
Genus Spinodiscus Kobayashi, 1943 †
Genus Spinoproetus Snajdr, 1977 †
Genus Spinoredlichia Liu, 1975 †
Genus Spirantyx Whittard, 1961 †
Genus Spitiaspis Kobayashi, 1967 †
Genus Spitsbergaspis Pribyl & Vanek, 1980 †
Genus Squarrosoella Wu & Lin in Zhang, Lin, Wu & Yuan, 1980 †
Genus Staurogmus Hawle & Corda, 1847 † accepted as Sao Barrande, 1846 †
Genus Stauroholcus Resser, 1939 †
Genus Stella Egorova & Savitsky, 1968 †
Genus Stigmametopus Rasetti, 1944 †
Genus Stoecklinia Wolfart, 1974 †
Genus Stoermeraspis Prantl & Pribyl, 1947 †
Genus Stoermeria Prantl & Pribyl, 1947 †
Genus Stormeraspis Prantl & Pribyl, 1947 † accepted as Stoermeraspis Prantl & Pribyl, 1947 †
Genus Størmeraspis Prantl & Pribyl, 1947 † accepted as Stoermeraspis Prantl & Pribyl, 1947 †
Genus Stormeria Prantl & Pribyl, 1947 † accepted as Stoermeria Prantl & Pribyl, 1947 †
Genus Størmeria Prantl & Pribyl, 1947 † accepted as Stoermeria Prantl & Pribyl, 1947 †
Genus Strotocephalus Resser, 1935 †
Genus Strototropis Raymond, 1937 †
Genus Struveaspis Alberti, 1966 †
Genus Struveria Rickards, 1965 †
Genus Styginella Pribyl & Vanek, 1972 †
Genus Stypacephalus †
Genus Subitella Repina, 1980 †
Genus Sujaraspis Romanenko in Romanenko et al., 1967 †
Genus Sukhanaspis Lazarenko in Lazarenko & Nikiforov, 1968 †
Genus Sulcubole Groning, 1985 †
Genus Suluktella Khairullina in Repina, Petrunina & Khairullina, 1975 †
Genus Sunaspidella Zhang & Yuan, 1981 †
Genus Sunaspis Lu, 1953 †
Genus Surachia Pokrovskaya in Demokidov & Pokrovskaya, 1965 †
Genus Suturikephalion Kobayashi & Hamada, 1982 †
Genus Suyougouia Lin & Zhang, 1979 †
Genus Svobodapeltis Šnajdr, 1957 †
Genus Syannigina Korobeinikova, 1974 †
Genus Symphyroxochus Rosova in Rosova, Rosov & Dubatolova, 1985 †
Genus Symphysurinella Raymond, 1937 †
Genus Symphysuroides Raymond, 1937 †
Genus Synphoria Delo, 1935 †
Genus Szeaspis Chang, 1959 †
Genus Szechuanaspis Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974 †
Genus Tabalqueia Rusconi, 1958 †
Genus Tadakoustia Geyer, 1990 †
Genus Tadjikia Khairullina, 1973 †
Genus Taenicephalops Ergaliev, 1980 †
Genus Tafilaltaspis Alberti, 1966 †
Genus Tafnaspis Leanza & Baldis, 1975 †
Genus Tagazella Romanenko, 1972 †
Genus Tagenarella Lazarenko in Datsenko et al., 1968 †
Genus Tageneraspis †
Genus Taianocephalus Sun, 1925 †
Genus Taidonorus †
Genus Taidonurus Petrunina in Petranina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 †
Genus Taiganella Repina in Egorova et al., 1960 †
Genus Taimyraspis Balashova, 1959 †
Genus Taipaikia Kobayashi, 1960 †
Genus Taitzuina Zhang & Yuan, 1981 †
Genus Talacastops Edgecombe, Vaccari & Waisfeld, 1994 †
Genus Talus Haas, 1968 †
Genus Tamaranella Rozova, 1963 †
Genus Tambakia Kobayashi & Hamada, 1971 †
Genus Tamdaspis Lisogor, 1977 †
Genus Tangbailaspis Hsiang & Zhang, 1983 †
Genus Tangenarella †
Genus Tangjiaella Qiu, 1984 †
Genus Tangshihella Hupé, 1955 †
Genus Tangshihlingia Chu, 1959 †
Genus Tangyaia Lu, 1975 †
Genus Taniaspidella †
Genus Taniaspidella Semashko, 1971 †
Genus Tankhella Chernysheva, 1961 †
Genus Taplimella †
Genus Tarayagnostus Suarez-Soruco, 1975 †
Genus Tarynaspis Repina in Khomentovsky & Repina, 1965 †
Genus Tasmanaspis Kobayashi, 1940 †
Genus Tatanspis †
Genus Tatulaspis Ivshin, 1956 †
Genus Taxioura Resser, 1939 †
Genus Taxotina Lazarenko, 1966 †
Genus Taynaella Spassky, 1989 †
Genus Tazemmourtia Hupé, 1960 †
Genus Tazzemmourtia †
Genus Tchuostachia Khramova, 1973 †
Genus Telaemarrolithus Williams, 1948 †
Genus Telephops Nikolaisen, 1963 †
Genus Telesiops Rafinesque, 1832 †
Genus Teljanzella Repina in Okuneva & Repina, 1973 †
Genus Temnura Resser & Endo in Kobayashi, 1935 †
Genus Temnurus Resser & Endo in Kobayashi, 1935 †
Genus Tengfengia Hsiang, 1962 †
Genus Terechtaspis Repina, 1960 †
Genus Tersella Petrunina, 1973 †
Genus Tersiceps Repina in Repina, Khomentovskii et al., 1964 †
Genus Tesselacaudella Balashova, 1967 †
Genus Tetinia Chlupac, 1971 †
Genus Tetraceroura Chang, 1963 †
Genus Tetracnemis Hawle & Corda, 1847 †
Genus Tetragonocephalus Repina in Khomentovsky & Repina, 1965 †
Genus Tetralichas Phleger, 1936 †
Genus Tetralichas Weber, 1951 †
Genus Tetrapsellium Hawle & Corda, 1847 †
Genus Tewonia Zhou in Zhou, Li & Qu, 1982 †
Genus Thaiaspella Kobayashi & Hamada, 1978 †
Genus Thailandium Kobayashi, 1957 †
Genus Thallulus Kowalski, 1983 †
Genus Thelecalymene Whittington, 1971 †
Genus Thielaspis Singleton in Harris & Thomas, 1954 †
Genus Thigriffithides Hessler, 1965 †
Genus Tholifrons Palmer, 1968 †
Genus Thomondia Harper, 1942 †
Genus Thomsonaspis Deiss, 1939 †
Genus Thoralocolus Pillet & Courtessole, 1985 †
Genus Thorslundops Pribyl & Vanek, 1981 †
Genus Thulincola Tripp, 1962 †
Genus Thuringaspis Struve, 1962 †
Genus Thymurus Whittard, 1966 †
Genus Tianjingshania Zhou in Zhou, Li & Qu, 1982 †
Genus Tianshanocephalus Zhang, 1981 †
Genus Tienshihfuia Lu in Lu, Chu, Chien et al., 1976 †
Genus Tienzhuia Chu, 1960 †
Genus Timnaella Parnes, 1971 †
Genus Tingyuania Sun & Chang, 1937 †
Genus Tiresias M'Coy in Griffith, 1846 †
Genus Tjungiella Khramova, 1980 †
Genus Tobatopyge Sivov in Borukaev, 1955 †
Genus Tolbinella Yegorova, 1983 †
Genus Tollaspellus Ivshin, 1953 †
Genus Tomoligus Rafinesque, 1832 †
Genus Tomorhachis Resser, 1938 †
Genus Tongxinaspis Zhou in Zhou Zhiqiang, 1981 †
Genus Tongxingaspis †
Genus Tontoia Walcott, 1912 †
Genus Torgaschina Repina, 1979 †
Genus Tormesiscus Waisfeld, Edgecombe & Vaccari, 1994 †
Genus Torosus Fedyanina, 1962 †
Genus Tosacephalus Kobayashi & Hamada, 1974 †
Genus Townleyella Öpik, 1967 †
Genus Toxotina Romanenko in Romanenko & Romanenko, 1967 †
Genus Toxotis Wallerius, 1895 †
Genus Trachoparia Chang, 1963 †
Genus Trachylichas Gürich, 1901 †
Genus Trachyostracus Lorenz, 1906 †
Genus Trapelocera Hawle & Corda, 1847 †
Genus Trapezocephalalina †
Genus Trapezocephalina Repina in Repina, Khomentovskii et al., 1964 †
Genus Trematophorus Balashova, 1953 †
Genus Tretaspis Murchison, 1839 †
Genus Triangullina †
Genus Tricornotarion Chatterton, 1971 †
Genus Trifonella Romanenko in Romanenko & Romanenko, 1967 †
Genus Trigonaspis Sandberger, 1849 †
Genus Trigoncekovia Xia, 1978 †
Genus Trigonoproetus Apollonov, 1974 †
Genus Trigrypos Kobayashi, 1940 †
Genus Trilobites Link, 1807 †
Genus Trilobus Brünnich, 1781 †
Genus Trinepea Palmer & Gatehouse, 1972 †
Genus Trinia Poletaeva, 1956 †
Genus Trinucleina Gilbert-Tomlinson, 1961 †
Genus Tripaulites Delo, 1935 †
Genus Triplacephalus Lu & Chien, 1978 †
Genus Trippia Lamont, 1978 †
Genus Tririmagnostus Qiu, 1983 †
Genus Tropiconiproetus Snajdr, 1980 †
Genus Tropicoryphe Snajdr, 1977 †
Genus Tropidaulus Fenton, 1937 †
Genus Truncatometopus Pillet, 1960 †
Genus Tsaidamaspis Chang & Fan, 1960 †
Genus Tsidrella † accepted as Isidrella Rusconi, 1955 †
Genus Tsunyilichas Chang, 1974 †
Genus Tukalandaspis Lazarenko in Lazarenko & Nikiforov, 1968 †
Genus Tukalandaspis Lazarenko & Datsenko, 1967 †
Genus Tumidulaspis Romanenko in Romanenko & Romanenko, 1967 †
Genus Tumulina Repina, 1960 †
Genus Tumulina Repina, 1959 †
Genus Tungusella Repina, 1960 †
Genus Turantyx Pribyl & Vanek in Pribyl, Vanek & Pek, 1985 †
Genus Tuvinia Poletaeva in Pokrovskaya, 1959 †
Genus Tuyunaspis †
Genus Tylotaitzuia Chang, 1963 †
Genus Tylotaspis Zhang, 1983 †
Genus Typhlokorynetes Shaw, 1966 †
Genus Typhloniscus Salter, 1856 †
Genus Tzuchiatocnemis Sheng, 1974 †
Genus Ukukites Pokrovskaya, 1961 †
Genus Ulakhanella Repina in Repina, Lazarenko & Nikiforov, 1974 †
Genus Ulania Lin & Zhang, 1979 †
Genus Ulankanella †
Genus Ullaspis Westergard, 1948 †
Genus Ulrichaspis Rasetti, 1945 †
Genus Ulricholithus Bancroft & Lamont, 1949 †
Genus Ulricholithus Bancroft, 1933 †
Genus Ulrickaspis †
Genus Ulugtella Petrunina in Repina, Petrunina & Khairullina, 1975 †
Genus Unguloharpes Pribyl & Vanek, 1981 †
Genus Upplandiops Jaanusson & Ramskold, 1993 †
Genus Uriarra Chatterton & Campbell, 1980 †
Genus Urjungaspis Egorova & Savitsky, 1968 †
Genus Usoviana Poletaeva, 1969 †
Genus Usumunaspis Lazarenko, 1962 †
Genus Utaspis Robison, 1964 †
Genus Vacuaspis Balashova, 1967 †
Genus Valdaites †
Genus Validaspis Repina, 1977 †
Genus Variopelta Fritz, 1972 †
Genus Varvaspis Tjernvik in Tjernvik & Johansson, 1980 †
Genus Velieuxia Courtessole, 1973 †
Genus Veragraulos Bognibova & Shcheglov, 1970 †
Genus Veragraulos Fedyanina in Bognibova, Koptev et al., 1971 †
Genus Verditerrina Robison, 1988 †
Genus Verkholenella Sachuk, 1964 †
Genus Viaphaeops Maksimova, 1971 †
Genus Viaphaeops Maksimova, 1972 †
Genus Vica Bognibova & Shcheglov, 1970 †
Genus Vica Poletaeva in Bognibova, Koptev et al., 1971 †
Genus Vicinopeltis Pribyl, 1967 †
Genus Villicumia Hupe †
Genus Vinakainella Rusconi, 1952 †
Genus Viñakainella Rusconi, 1952 † accepted as Vinakainella Rusconi, 1952 †
Genus Vinikainella †
Genus Vironiaspis Jaanusson & Ramskold, 1993 †
Genus Viruanaspis Pribyl & Vanek, 1978 †
Genus Vistoia Walcott, 1925 †
Genus Voigtaspls Alberti, 1967 †
Genus Vokovicia Snajdr, 1987 †
Genus Volchovites Balashova, 1967 †
Genus Volkops Struve, 1959 †
Genus Vologdinaspis Il'inykh, 1968 †
Genus Volonellus Ivshin, 1952 †
Genus Waigatchella Maksimova, 1970 †
Genus Walcottaspidella Chu, 1959 †
Genus Wanagnostus Qiu, 1983 †
Genus Wanbeiaspis Qiu, 1983 †
Genus Wandelella Robison, 1988 †
Genus Wannania Qiu, 1983 †
Genus Wanshania Rong & Yang, MS. †
Genus Wansliania Rong & Yang in Yang, 1978 †
Genus Wanwanoglobus Kobayashi, 1966 †
Genus Warendia Gilbert-Tomlinson, 1969 †
Genus Wedekindia Sun, 1935 †
Genus Wedekindiaspis Hsiang in Lu, Chang et al., 1965 †
Genus Wegelinia Pribyl & Vanek, 1981 †
Genus Weijiaspis Qiu, 1983 †
Genus Weishania Zhu & Wittke, 1989 †
Genus Wenganaspis Yin, 1978 †
Genus Wenganella Yin, 1978 †
Genus Wengangaspis Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Wenganlenus Yin, 1978 †
Genus Wentsuia Sun, 1925 †
Genus Wessekia Vogdes, 1925 †
Genus Westergaardella Kobayashi, 1962 †
Genus Westergardia Raymond, 1924 †
Genus Westergardites Troedsson, 1937 †
Genus Westergårdites Troedsson, 1937 † accepted as Westergardites Troedsson, 1937 †
Genus Westonaspis Rasetti, 1945 †
Genus Whitefieldina Resser, 1937 †
Genus Whittardolithus Hughes, Ingham & Addison, 1975 †
Genus Wiltzops Basse, 2003 †
Genus Winiskia Norford, 1981 †
Genus Winsteria †
Genus Wittekindtia Wolfart, 1970 †
Genus Wllsonella Hu, 1968 †
Genus Wolayella Erben, Flügel & Walliser in Weber, 1962 †
Genus Wossekia Raymond, 1916 †
Genus Wuania Chang, 1963 †
Genus Wuanoides Zhang & Yuan, 1981 †
Genus Wuchuanella Wu, 1978 †
Genus Wudangia Lee, 1978 †
Genus Wuhaina Zhang & Yuan, 1981 †
Genus Wuhushania Zhang & Yuan, 1981 †
Genus Wutingia Endo, 1935 † accepted as Endoaspis Lochman, 1956 †
Genus Wutingshania Chu, 1959 †
Genus Wuxunaspis Yuan in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Xenocyclopyge Lu, 1962 †
Genus Xialiangshania Chen in Li, Song, Zhou, Yang et al., 1975 †
Genus Xianfengia Zhu & Sun, 1977 †
Genus Xiangqianaspis Zhou in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Xiangshanaspis Lin, 1983 †
Genus Xiangshania Qiu, 1983 †
Genus Xiaodaositunia Nan & Chang, 1982 †
Genus Xiaofangshangia Qiu, 1980 †
Genus Xiaoshiella Lu & Qian, 1983 †
Genus Xinanocephalus Lee, 1978 †
Genus Xingrenaspis Yuan & Zhou in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Xingzishania Zhou in Li, Song, Zhou, Yang et al., 1975 †
Genus Xinjiangia Zhang, 1981 †
Genus Xishuiella Yin, 1978 †
Genus Xiuqiella Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974 †
Genus Xiushanopsis Lee, 1978 †
Genus Xiushuiproetus Zhang, 1983 †
Genus Xuzhouia Qiu, 1980 †
Genus Xystridura David, 1932 †
Genus Yankongia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974 †
Genus Yanquetruzia Rusconi, 1955 †
Genus Yanshanopyge Guo & Duan, 1978 †
Genus Yaojiayuella Lin & Wu in Zhang, Lin, Wu & Yuan, 1980 †
Genus Yarakia †
Genus Yarmakaspis Lisogor, 1977 †
Genus Yeshanaspis Zhu & Jiang, 1981 †
Genus Yinaspis Chang in Chang & Fan, 1960 †
Genus Yinganaspis Zhang, 1981 †
Genus Yinjiangia Yin, 1978 †
Genus Yinjiangolithus Yin, 1978 †
Genus Yokusenia Kobayashi, 1935 †
Genus Yongwolia Kobayashi, 1962 †
Genus Yoyarria Rusconi, 1955 †
Genus Yuehsienszella Chang, 1957 †
Genus Yujinia Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Yukonides Fritz, 1972 †
Genus Yunlingia Qiu, 1983 †
Genus Yupingia Lu, 1956 †
Genus Zacanthellina Repina in Khomentovsky & Repina, 1965 †
Genus Zacanthopsina Palmer, 1964 †
Genus Zacathellina Repina in Khomentovsky & Repina, 1965 †
Genus Zacompsus Raymond, 1924 †
Genus Zazvorkaspis Pribyl & Vanek, 1964 †
Genus Zetaproetus Snajdr, 1983 †
Genus Zethus Pander, 1830 †
Genus Zhaishania Qiu, 1983 †
Genus Zhanglouia Qiu, 1980 †
Genus Zhejiangoproetus Zhang & Ju, 1983 †
Genus Zhenbadiscus Zhang in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 †
Genus Zhenpingaspis Lee, 1978 †
Genus Zhenxiongaspis Lin & Yin, 1978 †
Genus Zhifangia Zhang †
Genus Zhongtiaoshanaspis Zhang & Yuan in Zhang, Lin, Wu & Yuan, 1980 †
Genus Zhongweia Zhou in Zhou Li & Qu, 1982 †
Genus Zhuangliella Qiu, 1983 †
Genus Zhujia Ju, 1983 †
Genus Zhusilengops Zhou & Campbell, 1990 †
Genus Ziboaspis Chang, 1963 †
Genus Zigzuella Hupé, 1960 †
Genus Zlichovaspis Pribyl & Vanek, 1971 †
Genus Ghanaspis Smith & Laurie, 2021 †
Genus Iridis Smith & Laurie, 2021 †
Genus Liopeishaniella Bentley, Jago & Cooper, 2016 †
Genus Sinagnostus Wei, Zhou, Zhan, Wu, Gong & Liu, 2021 †
Genus Toxotiformis Makarova, 2022 †
Genus Vicnepea Bentley, Jago & Cooper, 2016 †
Genus Yanpingia Wei, Zhou, Zhan, Wu, Gong & Liu, 2021 †
Family Jamrogiidae Bentley, Jago & Cooper, 2009 †
Family Missisquoiidae Hupé, 1955 †
Genus Elleria Raymond, 1944 †
Genus Indigestus Özdikmen, 2009 †
Genus Moolatrilo Malkani, 2019 †
Genus Nanshihmenia Zhang & Fan, 1960 †
Genus Nanshihmenia Chang, 1960 † accepted as Nanshihmenia Zhang & Fan, 1960 †
Genus Peculicephalina Qian, 1985 †
Genus Remeleaspis Basse, 2007 †
Order Trilobitomorpha (awaiting allocation) †
Class Arachnomorpha (awaiting allocation)
Class Arthropoda (awaiting allocation)
Class Artiopoda †
Class Crustaceomorpha incertae sedis †
Class Dinocaridida †
Class Labrophora incertae sedis
Class Lamellipedia incertae sedis
Class Megacheira †
Class Thylacocephala †
Class Xenocarida incertae sedis
Order Canadaspidida † accepted as Hymenocarina †
Order Cheloniellida †
Order Emeraldellida † accepted as Arthropoda
Order Fuxianhuiida †
Order Habeliida †
Order Hymenocarina †
Order Isoxyida †
Order Pectocaridida † accepted as Hymenocarina †
Order Waptiida † accepted as Hymenocarina †
Family Bomakellidae Fedonkin, 1987 †
Family Burgessiidae Walcott, 1912 †
Family Emeraldellidae Raymond, 1935 †
Family Guangweicarididae Luo, Fu, Hu, Li, Hou, You, Pang & Liu, 2007 †
Genus Aaveqaspis Peel & Stein, 2009 †
Genus Acheronauta Pulsipher, Anderson, Wright, Kluessendorf, Mikulic & Schiffbauer, 2022 †
Genus Arthroaspis Stein, Budd, Peel & Harper, 2013 †
Genus Astutuscaris Jiao & Du, 2022 †
Genus Bennettarthra Fayers, Trewin & Morrissey, 2010 †
Genus Bushizheia O'Flynn & Liu in O'Flynn et al., 2020 †
Genus Chuandianella Hou & Bergström, 1991 †
Genus Dioxycaris Gürich, 1929 †
Genus Dongshanocaris Hou, Bergström, Wang, Feng & Chen, 1999 †
Genus Duraznovis Lara, Cariglino & Zavattieri in Lara et al., 2019 †
Genus Duraznovs Lara, Cariglino & Zavattieri in Lara et al., 2019 † accepted as Duraznovis Lara, Cariglino & Zavattieri in Lara et al., 2019 †
Genus Esmeraldacaris Waggoner, 2003 †
Genus Fibulacaris Izquierdo-López & Caron, 2019 †
Genus Kiisortoqia Stein, 2010 †
Genus Kylinxia Zeng, Zhao, Niu, Zhu & Huang, 2020 †
Genus Lihuacaris Jiao, Pates, Lerosey-Aubril, Ortega-Hernández, Yang, Lan & Zhang, 2021 †
Genus Norikeya Tanaka, Siveter & Williams, 2013 †
Genus Nothozoe Barrande, 1872 †
Genus Nothozoe Barrande in Bigsby, 1868 † accepted as Nothozoe Barrande, 1872 †
Genus Notozoe Zittel, 1885 † accepted as Nothozoe Barrande, 1872 †
Genus Pakucaris Izquierdo-López & Caron, 2021 †
Genus Pambdelurion Budd, 1998 †
Genus Parvibellus Liu, Dunlop, Steiner & Shu, 2022 †
Genus Pleuralata McCoy, Strother & Briggs, 2012 †
Genus Pseudoangustidontus Van Roy & Tetlie, 2006 †
Genus Pteroessa Hudson & Gosse, 1886
Genus Sidneyia Walcott, 1911 †
Genus Siriocaris Lagebro, Stein & Peel, 2009 †
Genus Vermontcaris Pari, Briggs & Gaines, 2022 †
Genus Youti Smith, Long, Dhungana, Dobson, Yang & Zhang, 2024 †
Phylum Brachiopoda
Phylum Bryozoa
Phylum Cephalorhyncha incertae sedis
Phylum Chaetognatha
Phylum Chitinozoa †
Phylum Chordata
Phylum Cnidaria
Phylum Ctenophora
Phylum Cycliophora
Phylum Cycloneuralia incertae sedis
Phylum Ecdysozoa incertae sedis †
Phylum Echinodermata
Phylum Entoprocta
Phylum Gastrotricha
Phylum Gnathostomulida
Phylum Hemichordata
Phylum Hyolitha †
Phylum Kinorhyncha
Phylum Lobopoda †
Phylum Loricifera
Phylum Micrognathozoa
Phylum Mollusca
Phylum Monoblastozoa accepted as Animalia incertae sedis
Phylum Nematoda
Phylum Nematomorpha
Phylum Nemertea
Phylum Onychophora
Phylum Orthonectida
Phylum Phoronida
Phylum Placozoa
Phylum Platyhelminthes
Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
Phylum Porifera
Phylum Priapula accepted as Priapulida
Phylum Priapulida
Phylum Problematica † accepted as Animalia incertae sedis
Phylum Rhombozoa
Phylum Rotifera
Phylum Scalidophora incertae sedis
Phylum Sipuncula
Phylum Tardigrada
Phylum Trace fossils †
Phylum Vendobionta †
Phylum Vestimentifera accepted as Siboglinidae Caullery, 1914
Phylum Vetulicolia †
Phylum Vinctiplicata incertae sedis †
Phylum Xenacoelomorpha
Genus Trilobocaris Pribyl, 1953 †
Kingdom Archaea
Kingdom Bacteria
Kingdom Chromista
Kingdom Fungi
Kingdom Plantae
Kingdom Protista accepted as Protozoa
Kingdom Protozoa
Kingdom Viruses