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
- 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 †
- Class Chordophyceae † accepted as Trace fossils †
- Family Arenicolitidae †
- Family Bactrylliidae Knaust, 2020 †
- Family Balanoglossitidae Mägdefrau, 1932 †
- Family Belichnidae Wisshak, Knaust & Bertling, 2019 †
- Family Celliformidae Genise, 2000 †
- Family Centrichnidae Wisshak, Knaust & Bertling, 2019 †
- Family Circolitidae Wisshak, Knaust & Bertling, 2019 †
- Family Coprinisphaeridae Genise, 2004 †
- Family Coprulidae Knaust, 2008 †
- Family Delatorrichnidae Bordy, Rampersadh, Abrahams, Lockley & Head, 2020 †
- Family Dendrinidae Bromley, Wisshak, Glaub & Botquelen, 2007
- Family Entobiaidae Wisshak, Knaust & Bertling, 2019 †
- Family Entomoothecichnidae Lee, Famoso, & Lin, 2024 †
- Family Favreinidae Vialov, 1978 †
- Family Gastrochaenolitidae Wisshak, Knaust & Bertling, 2019 †
- Family Gnathichnidae Wisshak, Knaust & Bertling, 2019 †
- Family Ichnoreticulinidae Wisshak, Knaust & Bertling, 2019 †
- Family Krausichnidae Genise, 2004 †
- Family Lazaichnidae Genise, 2016 †
- Family Lumbricariidae Schweigert, 2001 †
- Family Machichnidae Wisshak, Knaust & Bertling, 2019 †
- Genus Heterodontichnites Rinehart, Lucas & Spielmann, 2006 † accepted as Mandaodonites Cruickshank, 1986 †
- Genus Knethichnus Jacobsen & Bromley, 2009 †
- Genus Linichnus Jacobsen & Bromley, 2009 †
- Genus Machichnus Mikuláš, Kadlecová, Fejfar & Dvořák, 2006 †
- Genus Mandaodonites Cruickshank, 1986 †
- Genus Nihilichnus Mikuláš, Kadlecová, Fejfar & Dvořák, 2006 †
- Family Marineropodidae Lockley, Cawthra, De Vynck, Helm, McCrea & Nel, 2019 †
- Family Oichnidae Wisshak, Knaust & Bertling, 2019 †
- Family Osteichnidae Höpner & Bertling, 2017 †
- Family Paleogallidae Vialov, 1975 †
- Family Paleominidae Vialov, 1975 †
- Family Paleoovoididae Vasilenko, 2005 †
- Family Pallichnidae Genise, 2004 †
- Family Phagophytichnidae Vialov, 1975 †
- Family Planobolidae Wisshak, Knaust & Bertling, 2019 †
- Family Podichnidae Wisshak, Knaust & Bertling, 2019 †
- Family Renichnidae Wisshak, Knaust & Bertling, 2019 †
- Family Rodgerellidae † accepted as Rogerellidae Codez & de Saint‑Seine, 1958 †
- Family Rogerellidae Codez & de Saint‑Seine, 1958 †
- Family Saccomorphidae Wisshak, Knaust & Bertling, 2019 †
- Family Siphonichnidae Knaust, 2015 †
- Family Talpinidae Wisshak, Knaust & Bertling, 2019 †
- Family Trypanitidae Mägdefrau, 1932 †
- Family Zapfellidae Codez & Saint-Seine, 1958 † accepted as Rogerellidae Codez & de Saint‑Seine, 1958 †
- Genus Acanthichnus Hitchcock, 1858 †
- Genus Acanthorhaphe Ksiazkiewicz, 1970 †
- Genus Acripes Matthew, 1909 †
- Genus Actinosalpinx Sokolov, 1962 †
- Genus Aggregatella Elliott, 1962 †
- Genus Akinereites Katto, 1964 †
- Genus Alaichnus Mayoral et al., 2018 †
- Genus Alococopros Hunt, Lucas, Spielmann & Lerner, 2007 †
- Genus Ampelichnus Hitchcock, 1865 †
- Genus Amphicopros Rakshit & Ray, 2022 †
- Genus Amphifaoichnus Pirrone & Buatois, 2016 †
- Genus Ancientia Ross, 1967 †
- Genus Anmolpakhiperus Malkani, 2021 †
- Genus Annelidichnium Kuhn, 1937 †
- Genus Apodichnites Hitchcock, 1869 †
- Genus Apostigmonoma Krassilov, 2008 †
- Genus Arachnostega Bertling, 1992
- Genus Aracoaraichnium Buck, Ghilardi, dos Reis Fernandes & Fernandes, 2017 †
- Genus Archaeonassa Fenton & Fenton, 1937 †
- Genus Arenituba Stanley & Pickerill, 1995 †
- Genus Argonevis Kozur & Mostler, 1972 †
- Genus Arthraria Billings, 1872 †
- Genus Arthrophycus Hall, 1852 †
- Genus Arthropodichnus Chiplonkar & Badwe, 1970 †
- Genus Arthropodichnus Gevers in Gevers, Frakes, Edwards & Marzolf, 1971 †
- Genus Arthrotelsonichnus Chiplonkar & Ghare, 1975 †
- Genus Artichnus Zakharov, 1972 †
- Genus Artichnus Zhang, Uchman, Chodyn & Bromley, 2008 †
- Genus Asterichnus Bandel, 1967 †
- Genus Asteronoma Krassilov, 2008 †
- Genus Asturichnus Garcia-Ramos, 1977 †
- Genus Atlantaia Borrello, 1967 †
- Genus Augerinoichnus Minter, Lucas, Lerner & Braddy, 2008 †
- Genus Avetoichnus Uchman & Rattazzi, 2011 †
- Genus Ayalaites Noda & Miranda, 1974 †
- Genus Bacillafaex Habgood, Hass & Kerp, 2004 †
- Genus Bascomella Morningstar, 1922 †
- Genus Beaconichnus Gevers, 1973 †
- Genus Bellosichnus Genise & Sánchez, 2017 †
- Genus Bensoniotheca Mickle & Rothwell, 1979 †
- Genus Bergaueria Prantl, 1946 †
- Genus Bibliocoprus Hunt, Lucas, Spielmann, Cantrell & Suazo, 2012 †
- Genus Bifasciculus Volk, 1960 †
- Genus Bilinichnus Fedonkin & Palij in Palij, Posti & Fedonkin, 1979 †
- Genus Biruichnus Wang, Wang, Li, Ma & Yang, 2007 †
- Genus Bisulcus Hitchcock, 1865 †
- Genus Bogschites Kozur & Mostler, 1972 †
- Genus Bonariensia Borrello, 1967 †
- Genus Bornichnus Bromley & Uchman, 2003 †
- Genus Bostrichophyton S. Squinabol, 1890 †
- Genus Bostricophyton Squinabol †
- Genus Bothrioichnus Palmer & Plewes, 1993 †
- Genus Bovinichnus Neto de Carvalho et al., 2022 †
- Genus Brookvalichnus Webby, 1970 †
- Genus Brownichnus Genise, 2000 †
- Genus Brutalichnus Mikuláš, Kadlecová, Fejfar & Dvořák, 2006 †
- Genus Buchholzbrunnichnus Germs, 1973 †
- Genus Burrinjuckia Chatterton, 1975 †
- Genus Caletichnus Breton, 2006 †
- Genus Calorckosauripus Meyer, Marty & Belvedere, 2018 †
- Genus Candeleroichnus Calvo & Rivera, 2018 †
- Genus Cardinichnus Benner, Knecht & Engel, 2015 †
- Genus Caridolites Etheridge, Woodward & Jones, 1890 †
- Genus Catenoveon Krassilov & Silantieva in Krassilov, 2008 †
- Genus Caupokeras McKinney, 2009 †
- Genus Ceratophycus W.P. Schimper in W.P. Schimper & Schenk, 1879 † accepted as Spirophycus Häntzschel, 1962 †
- Genus Chaetophorites Pratje, 1922 †
- Genus Chapadmalidium Borrello, 1967 †
- Genus Chevronichnus Hakes, 1976 †
- Genus Chiltansauroperus Malkani, 2021 †
- Genus Chondrites Sternberg, 1833 †
- Genus Chondrites Solle, 1938 †
- Genus Chondritis Göppert, 1847 †
- Genus Chondritoides Borrello, 1966 †
- Genus Chondrorhaphe Seilacher, 1977 †
- Genus Chrossochorda G. de Saporta & A.F. Marion, 1881 † accepted as Protovirgularia M'Coy, 1850 †
- Genus Climacodichnus Hitchcock, 1865 †
- Genus Clionoida Smith, 1910 †
- Genus Cobalia Étallon, 1859 †
- Genus Cochlea Hitchcock, 1858 †
- Genus Cochlichnus Hitchcock, 1858 †
- Genus Conchobromus Hunt, Lucas, Spielmann, Suazo & Cantrell, 2012 †
- Genus Conospiron Vialov, 1969 † accepted as Gyrolithes Saporta, 1884 †
- Genus Contiichnus Citton, Carluccio, Nicolosi & Nicosia, 2017 †
- Genus Coprolithus Paréjas, 1948 †
- Genus Cornuvacites Kozur & Mostler, 1972 †
- Genus Costacoprus Hunt, Lucas & Spielmann, 2012 †
- Genus Costaeon Krassilov, 2008 †
- Genus Costoveon Krassilov, 2008 †
- Genus Crassocoprus Hunt, Lucas, Spielmann, Cantrell, Suazo & Lerner, 2012 †
- Genus Crossochorda W.P. Schimper in W.P. Schimper & Schenk, 1879 † accepted as Protovirgularia M'Coy, 1850 †
- Genus Crustacoprus Hunt, Lucas, Spielmann, Cantrell, Suazo & Lerner, 2012 †
- Genus Cruziana d'Orbigny, 1842 †
- Genus Cupuleon Krassilov, 2008 †
- Genus Curvichnus Nielsen, 2002 †
- Genus Cylindrichnus Bandel, 1967 †
- Genus Cyphonichnus Karaszewski, 1974 †
- Genus Dactyloichnus Grytsenko, 2016 †
- Genus Daemonelix Barbour, 1897 † accepted as Daimonelix Barbour, 1892 †
- Genus Daimonelix Schultz, 1942 † accepted as Daimonelix Barbour, 1892 †
- Genus Daimonelix Barbour, 1892 †
- Genus Daimonhelix Fuchs, 1895 † accepted as Daimonelix Barbour, 1892 †
- Genus Dakyronocopros Hunt & Lucas, 2005 †
- Genus Daniacopros Milàn & Hunt, 2016 †
- Genus Dazeodesma Borrello, 1967 †
- Genus Dendrorhaphe Seilacher, 1977 †
- Genus Dgkhansauropterus Malkani, 2021 † accepted as Dgkhansaurus Malkani, 2019 †
- Genus Dgkhansaurus Malkani, 2019 †
- Genus Diapasolutum Kuss & Senowbari-Daryan, 1992 †
- Genus Didymaulichnus Young, 1972 †
- Genus Dimorphichnus Seilacher, 1955 †
- Genus Diplopodomorpha Chiplonkar & Badwe, 1970 †
- Genus Dipodichnites Hitchcock, 1844 †
- Genus Distigmonoma Krassilov, 2008 †
- Genus Dolomitipes Marchetti, Voigt & Klein, 2019 †
- Genus Doratocoprus Hunt & Lucas, 2017 †
- Genus Doushantuoichnus Wang & Xu, 2007 †
- Genus Dromaeosauriformipes Kim et al., 2018 †
- Genus Echinospira Girotti, 1971 †
- Genus Elacacoprus Hunt, Lucas, Spielmann, Cantrell, Suazo & Lerner, 2012 †
- Genus Elongatocoprus Hunt, Lucas, Spielmann, Cantrell, Suazo & Lerner, 2012 †
- Genus Emergeon Krassilov, 2008 †
- Genus Endoconchia Runnegar in Bengtson et al., 1990 †
- Genus Eoclathrus Squinabol, 1888 †
- Genus Eodiorygma Bassett, Popov & Holmer, 2004 †
- Genus Equicoprus Vyalov, 1976 †
- Genus Erinea Kozur & Mostler, 1972 †
- Genus Eucoprus Hunt & Lucas, 2012 †
- Genus Euflabella Olivero & López Cabrera, 2013 †
- Genus Eustigmonoma Krassilov, 2008 †
- Genus Falcatocopros Hunt, Lucas, Spielmann & Lerner, 2007 †
- Genus Fanerocoelia Kozur & Mostler, 1972 †
- Genus Fascichnus Radtke & Golubic, 2005
- Genus Fasciculus Radtke, 1991 accepted as Fascichnus Radtke & Golubic, 2005
- Genus Fascifodina Osgood, 1970 †
- Genus Feddenichnus Chiplonkar & Borkar, 1973 †
- Genus Felderichnus Breton, 2006 †
- Genus Feldmannia Casadío, Marenssi & Santillana, 2001 † accepted as Feldmannius Low & Guinot, 2010 †
- Genus Feldmannius Low & Guinot, 2010 †
- Genus Flagrichnus Wisshak & Porter, 2006 †
- Genus Foggara Breton, Jäger & Kočí, 2020 †
- Genus Folicasa Krassilov, 2008 †
- Genus Foveichnus Knaust, 2021 †
- Genus Foveon Krassilov, 2008 †
- Genus Fractisemita Raisanen & Hasiotis, 2018 †
- Genus Fraena Rouault, 1850 †
- Genus Funalichnus Pokorný, 2008 †
- Genus Funiculichnus LoBue, 2010 †
- Genus Furculosus Roniewicz & Pienkowski, 1977 †
- Genus Fustiglyphus Vyalov, 1971 †
- Genus Fustinianapodus Díaz-Martínez, Suarez-Hernando, Larrasoaña, Martínez-García, Baceta & Murelaga, 2020 †
- Genus Gariwerdichnus Gouramanis, Martin & Webb, 2021 †
- Genus Gaspeichnus Hunt, Lucas & Klein, 2018 †
- Genus Gochtia Eisenack, 1968 †
- Genus Gonfaronipes Heyler & Montenat, 1981 †
- Genus Gordia Emmons, 1844 †
- Genus Graysonia Stephenson, 1952 †
- Genus Guanshanichnus Weber, Hu, Steiner & Zhao, 2012 †
- Genus Gyrochorda Schimper in Zittel, 1879 †
- Genus Gyrochordae Schimper in Zittel, 1879 †
- Genus Gyrochorte O. Heer, 1864 †
- Genus Gyrolithes Saporta, 1884 †
- Genus Haguenowia Étallon, 1860 †
- Genus Halimedides J. Lorenz von Liburnau, 1902 †
- Genus Halysichnus Hitchcock, 1858 †
- Genus Haplorygma Baliński & Sun, 2010 †
- Genus Haplotichnus Miller, 1889 †
- Genus Harinellites Kozur & Mostler, 1972 †
- Genus Hauthaleia Borrello, 1967 †
- Genus Helicolithus Azpeitia-Moros, 1933 †
- Genus Helicorhape Ksiazkiewicz, 1970 †
- Genus Helicosalpinx Oekentorp, 1969 †
- Genus Helminthoidichnites Fitch, 1849 †
- Genus Helminthopsis Heer, 1877 †
- Genus Helminthorhaphe Seilacher, 1977 †
- Genus Hemicanalis Chiplonkar & Ghare, 1977 † accepted as Arachnostega Bertling, 1992
- Genus Hemisphaerichnus Sennikov, 2022 † accepted as Rusophycus Hall, 1852 †
- Genus Heterotheca M. Benson, 1922 † accepted as Bensoniotheca Mickle & Rothwell, 1979 †
- Genus Himalayadrindoperus Malkani, 2021 †
- Genus Hirabromus Hunt, Lucas & Spielmann, 2012 †
- Genus Hitachia Hatai & Noda, 1972 †
- Genus Holostigmonoma Krassilov, 2008 †
- Genus Hormosiroidea Schaffer, 1928 †
- Genus Humilis Rouault, 1850 †
- Genus Hyaenacoprus Hunt, Lucas & Spielmann, 2012 †
- Genus Hyronocopros Hunt, Lucas & Spielmann, 2005 †
- Genus Ichnogutta Botquelen & Mayoral, 2005 †
- Genus Ichnogyrus Bown & Kraus, 1983 † accepted as Gyrolithes Saporta, 1884 †
- Genus Ichnotorula Tavernier & Golubic, 1993 †
- Genus Ichthyosaurolites Hunt, Lucas & Spielmann, 2012 †
- Genus Imbrichnus Hallam, 1970 †
- Genus Involuteon Krassilov, 2008 †
- Genus Iramena Boekschoten, 1970 †
- Genus Iranipeda Vialov, 1989 †
- Genus Iranipedia Vialov, 1989 † accepted as Iranipeda Vialov, 1989 †
- Genus Irinella Kozur & Mostler, 1972 †
- Genus Isnardia Borrello, 1967 †
- Genus Isnella Senowbari-Daryan, 2007 †
- Genus Isopodichnus Bornemann, 1889 †
- Genus Iuloeidocoprus Hunt, Lucas & Spielmann, 2012 †
- Genus Kailidiscus Wang, 2006 †
- Genus Kalocoprus Hunt, Lucas, Spielmann, Cantrell & Suazo, 2012 †
- Genus Karethraichnus Zonneveld, Bartels, Gunnell & McHugh, 2015 †
- Genus Katarrhedrites Hembree & Hasiotis, 2008 †
- Genus Katbergia Gastaldo & Rolerson, 2008 †
- Genus Keidelasma Borrello, 1967 †
- Genus Kladosystemites Hembree & Hasiotis, 2008 †
- Genus Kleithrichnus Breton, Jäger & Kočí, 2020 †
- Genus Klemmatoica Tapanila & Holmer, 2006 †
- Genus Krinodromos Neto de Carvalho et al., 2016 †
- Genus Kunlunichnus Gong, 1999 †
- Genus Ladinella Kraus & Ott, 1968 †
- Genus Lajasichnus Aceñolaza, 2004 †
- Genus Lamellaecylindrica Knaust, 2021 †
- Genus Lamellitubus Kraus & Ott, 1968 †
- Genus Lamonte Meyer, Xiao, Gill, Schiffbauer, Chen, Zhou & Yuan, 2014 †
- Genus Lancifaex Habgood, Hass & Kerp, 2004 †
- Genus Lanicoidichna Chamberlain, 1971 †
- Genus Laterigradus Neto de Carvalho et al., 2016 †
- Genus Lenticeon Krassilov, 2008 †
- Genus Liassocopros Hunt, Lucas, Spielmann & Lerner, 2007 †
- Genus Limolepis Kozur & Mostler, 1972 †
- Genus Linbotulichnus Li & Ding in Ding et al., 1996 †
- Genus Linbotulitaenia Wang, Wang, Du & Wang, 2016 †
- Genus Lingulichnus Hakes, 1976 †
- Genus Lobichnus Kemper, 1968 †
- Genus Luancaia Mángano, Piñuela, Buatois, Ortega-Hernández, Rodríguez-Tovar & García-Ramos, 2021 † accepted as Luancaina Mángano, Piñuela, Buatois, Ortega-Hernández, Rodríguez-Tovar & García-Ramos, 2021 †
- Genus Luancaina Mángano, Piñuela, Buatois, Ortega-Hernández, Rodríguez-Tovar & García-Ramos, 2021 †
- Genus Lunula Hitchcock, 1865 † accepted as Lunulipes Getty, 2017 †
- Genus Lunulipes Getty, 2017 †
- Genus Macanopsis Macsotay, 1967 †
- Genus Maichnus Genise, Victoria Sánchez, Poiré & González, 2020 †
- Genus Malakhelisauroperus Malkani, 2021 †
- Genus Malericopros Hunt, Lucas, Spielmann & Lerner, 2007 †
- Genus Mammillichnis Chamberlain, 1971 †
- Genus Margaritichnus Bandel, 1973 †
- Genus Margoveon Krassilov, 2008 †
- Genus Massoveon Krassilov, 2008 †
- Genus Megadictyon Kozur, Krainer & Mostler, 1996 † accepted as Paleodictyon Meneghini in Murchison, 1850 †
- Genus Megagyrolithes Gaillard, 1980 † accepted as Gyrolithes Saporta, 1884 †
- Genus Megaheteropolacopros Hunt, Lucas & Spielmann, 2005 †
- Genus Megakalocoprus Rummy, Halaclar & Chen, 2021 †
- Genus Megascolytinus Petrov, 2013 † accepted as Scolytolarvariumichnus Guo, 1991 †
- Genus Micatuba Chamberlain, 1971 †
- Genus Microphycus G.F. Matthew, 1890 †
- Genus Microptychoites Dong in Dong et al., 1984 †
- Genus Microspherichnus Hakes, 1976 †
- Genus Monoaulichnus Wang, 2007 †
- Genus Monomorphichnus Crimes, 1970 †
- Genus Montfortia Lebesconte, 1887 †
- Genus Munitusichnus Parkinson, 2016 †
- Genus Murchisonites H.R. Göppert, 1859 † accepted as Oldhamia E. Forbes, 1848 †
- Genus Musculopodus Getty & Hagadorn, 2008 †
- Genus Musvestigium Lockley, Goodell, Evaskovich, Krall, Schumacher & Romilio, 2022 †
- Genus Myrowichnus G.J. Retallack, 2009 †
- Genus Myxomitodes Bengtson, Rasmussen & Krapez, 2007 †
- Genus Naktodemasis Smith, Hasiotis, Kraus & Woody, 2008 †
- Genus Nankaites Katto, 1964 †
- Genus Narragansettichnus Getty, Sproule, Stimson & Lyons, 2017 †
- Genus Natatorichnus Lockley, Helm, Cawthra, De Vynck & Perrin, 2021 †
- Genus Natipes Heyler & Gand, 2001 †
- Genus Naviculichnium Ksiazkiewicz, 1977 †
- Genus Neantia Lebesconte, 1887 †
- Genus Nemotapis Kozur & Mostler, 1972 †
- Genus Neoeione Boyd & McIlroy, 2018 †
- Genus Nereites MacLeay in Murchison, 1839 †
- Genus Nulliporites Heer, 1865 †
- Genus Oblongichnus Haouz, Lagnaoui & Silantiev, 2020 †
- Genus Occitanopodus Moreau et al., 2019 †
- Genus Odotula Hayasaka & Aoyana, 1975 †
- Genus Oldhamia E. Forbes, 1848 †
- Genus Olenichnus Fedonkin, 1985 †
- Genus Olivellites Fenton & Fenton, 1937 † accepted as Psammichnites Torell, 1870 †
- Genus Omanichnus Wetzel, Uchman, Blechschmidt & Matter, 2009 †
- Genus Ophionoma Krassilov, 2008 †
- Genus Ophistigmonoma Krassilov, 2008 †
- Genus Ordexallopus Lockley, Li, Xing, Guo & Matsukawa, 2018 †
- Genus Oscillorhaphe Seilacher, 1977 †
- Genus Osedacoides Karl, Gröning & Brauckmann, 2012 †
- Genus Ostracobromus Hunt, Lucas, Spielmann & Lockley, 2012 †
- Genus Palaeocerambichnius Müller-Stoll, 1989 †
- Genus Palaeodictyon O. Heer, 1864 † accepted as Paleodictyon Meneghini in Murchison, 1850 †
- Genus Palaeophycus Hall, 1847 †
- Genus Paleodictyon Meneghini in Murchison, 1850 †
- Genus Paleophycus James, 1879 †
- Genus Paleoscopimera Katto, 1962 †
- Genus Paracamelichnum Pérez-Lorente, Herrero, Herrero & Montoya, 2009 †
- Genus Paraophidichnium Demathieu, 1977 †
- Genus Pararusophycus Ksiazkiewicz, 1977 †
- Genus Paratisoa Gaillard, 1972 †
- Genus Pashtosauroperus Malkani, 2021 †
- Genus Paskomella Főzy, 2019 †
- Genus Pectichnus Feng, Bertling, Noll, Ślipiński & Rößler, 2019 †
- Genus Pennatichnus Mayoral, 1988 †
- Genus Pennichnus Pan, Nara, Löwemark, Miguez-Salas, Gunnarson, Iizuka, Chen & Dashtgard, 2021 †
- Genus Pentichnus Maerz, Kaesler & Hakes, 1976 †
- Genus Petioleon Krassilov, 2008 †
- Genus Phagolignichnus Vyalov, 1975 †
- Genus Phycodes Richter, 1850 †
- Genus Phyllochorda W.P. Schimper in W.P. Schimper & Schenk, 1879 †
- Genus Pilichnia Chamberlain, 1971 †
- Genus Pinaceocladichnus Mayoral, 1988 †
- Genus Placerotapis Kozur & Mostler, 1972 †
- Genus Planalites Walcott, 1899 †
- Genus Plangtichnus Miller, 1889 † accepted as Treptichnus Miller, 1889 †
- Genus Planolites Nicholson, 1873 †
- Genus Platicytes Garvey & Hasiotis, 2008 †
- Genus Platyichnus Knaust, 2021 †
- Genus Plektecoprus Hunt, Lucas & Spielmann, 2012 †
- Genus Pluriramosus Turman, Peixoto, Marinho & Fernandes, 2021 †
- Genus Polychoredrites Hembree & Hasiotis, 2008 †
- Genus Porpaichnus Abbassi & Mustoe, 2018 †
- Genus Potiria Borrello, 1967 †
- Genus Protopalaeodictyon Ksiazkiewicz, 1970 †
- Genus Protopaleodictyon Ksiazkiewicz, 1970 †
- Genus Protovirgularia M'Coy in Sedgwick & McCoy, 1851 † accepted as Protovirgularia M'Coy, 1850 †
- Genus Protovirgularia M'Coy, 1850 †
- Genus Psammichnites Torell, 1870 †
- Genus Pseudocucumaria Katto, 1974 †
- Genus Pseudodesmograpton Macsotay, 1967 †
- Genus Punctorhaphe Seilacher, 1977 †
- Genus Pustuleon Krassilov, 2008 †
- Genus Pygospioides Hantzschel & Reineck, 1968 †
- Genus Quadridigitus Lockley, Kim, Lim & Romilio, 2020 †
- Genus Quebecichnus Hoffman, 1972 †
- Genus Radialimbricatus Lee, 2017 †
- Genus Radiichnus Karaszewski, 1973 †
- Genus Radimonis Kozur & Mostler, 1972 †
- Genus Ramidictyon Seilacher, 1977 †
- Genus Ramosichnus Schweigert & Dietl, 2007 †
- Genus Reniformichnus Krummeck & Bordy, 2018 †
- Genus Reticulum C. de Stefani, 1879 † accepted as Palaeodictyon O. Heer, 1864 †
- Genus Retiphycus Ulrich, 1904 † accepted as Paleodictyon Meneghini in Murchison, 1850 †
- Genus Rewacopros Rakshit & Ray, 2022 †
- Genus Rhizocorallium Zenker, 1836 †
- Genus Rhysophycus Schimper in Zittel, 1879 †
- Genus Rivularites P. Fliche, 1905 †
- Genus Rodocanalis Schloz, 1972 †
- Genus Rosarichnoides Chrząstek, Muszer, Solecki & Sroka, 2018 †
- Genus Rosselia Dahmer, 1937 †
- Genus Rotundafaex Habgood, Hass & Kerp, 2004 †
- Genus Rugalichnus Stimson, Miller, MacRae & Hinds, 2017 †
- Genus Rugoinfractus Paly, 1974 †
- Genus Runia Marek, 1982 † accepted as Rodocanalis Schloz, 1972 †
- Genus Rusophycus Hall, 1852 †
- Genus Sabularia Ksiazkiewicz, 1977 †
- Genus Salsariichnus Donovan, Jagt & van Knippenberg, 2019 †
- Genus Samanadrindoperus Malkani, 2021 †
- Genus Saurocopros Hunt, Lucas, Spielmann & Lerner, 2007 †
- Genus Schilleria Borrello, 1967 †
- Genus Scolecia Radtke, 1991 †
- Genus Scolytolarvariumichnus Guo, 1991 †
- Genus Scotolithus Linnarsson, 1871 †
- Genus Scrollocoprus Rummy, Halaclar & Chen, 2021 †
- Genus Sedilichnus Muller, 1977 †
- Genus Segmentichnus Uchman & Geyer, 2020 †
- Genus Sertoveon Krassilov, 2008 †
- Genus Skolichnus Uchman, 2010 †
- Genus Speiracoprus Hunt, Lucas, Spielmann, Cantrell, Suazo & Lerner, 2012 †
- Genus Spiralites Wincierz, 1973 †
- Genus Spirochorda W.P. Schimper in W.P. Schimper & Schenk, 1879 †
- Genus Spirophycus Häntzschel, 1962 †
- Genus Spiroscolex Torell, 1869 † accepted as Gyrolithes Saporta, 1884 †
- Genus Spongeliomorpha G. de Saporta, 1887 †
- Genus Squamichnus Leszczyński, 2003 †
- Genus Squamodictyon Vialov & Golev, 1960 †
- Genus Steigerwaldichnium Kuhn, 1937 †
- Genus Stellichnus Mayoral, 1987 †
- Genus Stichus Etheridge, 1904 †
- Genus Stigmatophaga Krassilov, 2008 †
- Genus Stomonoma Krassilov, 2008 †
- Genus Strabelocoprus Hunt, Lucas & Spielmann, 2012 †
- Genus Strechoritina Kozur & Mostler, 1972 †
- Genus Streptichnus Jensen & Runnegar, 2005 †
- Genus Strophocopros Hunt & Lucas, 2005 †
- Genus Suidichnus Neto De Carvalho et al., 2020 †
- Genus Sulcolithos Knaust, 2020 †
- Genus Sulculites Vyalov & Nesov, 1974 †
- Genus Sustergichnus Chamberlain, 1971 †
- Genus Symphyenoma Krassilov, 2008 †
- Genus Syringomorpha Nathorst, 1886 †
- Genus Taenidium O. Heer, 1877 †
- Genus Tandilinia Borrello, 1967 †
- Genus Taphrhelminthoida Ksiazkiewicz, 1977 †
- Genus Tarrichnium Wanner, 1938 †
- Genus Tasmanadia Chapman, 1929 †
- Genus Teichichnus Seilacher, 1955 †
- Genus Tetraphyllum Hosius & von der Marck, 1880 †
- Genus Thatchtelithichnus Zonneveld, Bartels, Gunnell & McHugh, 2015 †
- Genus Thorichnus Pokorný, Krmíček & Sudo, 2017 †
- Genus Thuringia W. Remy, 1953 †
- Genus Tikicopros Rakshit, Bhat, Mukherjee & Ray, 2019 †
- Genus Tomaculopsis Breton, 2011 †
- Genus Tonganoxichnus Mángano, Buatois, Maples & Lanier, 1997 †
- Genus Torrowangea Webby, 1970 †
- Genus Toxichnus Hitchcock, 1865 †
- Genus Transexcrementum Godfrey & Collareta, 2022 †
- Genus Transpiroveon Krassilov, 2008 †
- Genus Traucumichnis Ksiazkiewicz, 1977 †
- Genus Treptichnus Miller, 1889 †
- Genus Trichophycus Miller & Dyer, 1878 †
- Genus Trifurcus Plewes, 1996 †
- Genus Trilobitichnus Gevers, Frakes, Edwards & Marzolf, 1971 †
- Genus Triplifaex Breton, 2011 †
- Genus Trophoglypha Krassilov, 2008 †
- Genus Troponoma Krassilov, 2008 †
- Genus Trusheimichnus Schlirf, 2006 †
- Genus Tuberculichnus Kslazkiewicz, 1977 †
- Genus Tubichnus Grimmberger, 2013 †
- Genus Tubotomaculum García-Ramos, Mángano, Piñuela, Buatois & Rodríguez-Tovar, 2014 †
- Genus Tubulichnium Ksiazkiewicz, 1977 †
- Genus Tursia D'Alessandro & Fürsich, 2005 †
- Genus Tylichnus Osgood, 1970 †
- Genus Uchirites Macsotay, 1967 †
- Genus Umbonichnus Karaszewski, 1974 †
- Genus Unarites Macsotay, 1967 †
- Genus Upsiloides Byrne & Branson, 1941 †
- Genus Utatsuia Hatai & Murata, 1976 †
- Genus Uvanogelia Kozur & Mostler, 1972 †
- Genus Vatnaspor Pokorný, Krmíček & Sudo, 2017 †
- Genus Venerella Kozur & Mostler, 1972 †
- Genus Vermiculites Rouault, 1850 †
- Genus Vermiculites Bronn, 1848 †
- Genus Vermitubus Hatai, Murata & Kawakami, 1972 †
- Genus Vinculostercus Duffin & Ward, 2020 †
- Genus Virgoglyphus Patel, Joseph & Bhatt, 2014 †
- Genus Vitichnus Wetzel, Uchman, Blechschmidt & Matter, 2009 †
- Genus Vucetichia Borrello, 1967 †
- Genus Walcottia Miller & Dyer, 1878 †
- Genus Walpia White, 1929 †
- Genus Wenganichnus Wang & Xu, 2007 †
- Genus Xenokalymma Eisenack, 1968 †
- Genus Xylokrypta Tapanila & Roberts, 2012 †
- Genus Yaravidium Borrello, 1967 †
- Genus Yufenites You, Liu, Zhang, Song, Zhou, Yang & Li, 2021 †
- Genus Zavitokichnus Michalik & Šimo, 2010 †
- Genus Zonarites Sternberg, 1833 †
- 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
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