Abadehellidae Loeblich & Tappan, 1984 † (taxonomy source)
Abadehellidae Loeblich & Tappan, 1984 † (current name source)
Acanthocotylidae Price, 1936 (taxonomy source)
Acrosiphoniaceae S. Jónsson, 1959 accepted as Ulotrichaceae Kützing, 1843 (source of synonymy)
Acrosiphoniales accepted as Ulotrichales (source of synonymy)
Acrumenidae Karling, 1980 accepted as Cicerinidae Meixner, 1928 (source of synonymy)
Allomicrocotylidae Yamaguti, 1965 accepted as Allopyragraphoridae Yamaguti, 1953 (source of synonymy)
Allopyragraphoridae Yamaguti, 1953 (taxonomy source)
Anchorophoridae Bychowsky & Nagibina, 1958 (taxonomy source)
Ancyrocephalidae Bychowsky & Nagibina, 1968 (taxonomy source)
Angiodictyidae Looss, 1902 accepted as Microscaphidiidae Looss, 1900 (source of synonymy)
Anomalinidae Cushman, 1927 (taxonomy source)
Anomalinidae Cushman, 1927 (current name source)
Anoplodiscidae Tagliani, 1912 (taxonomy source)
Archaesphaeridae Malakhova, 1956 † (taxonomy source)
Archaesphaeridae Malakhova, 1956 † (current name source)
Assulina Ehrenberg, 1872 (current name source)
Asterocyclinidae Brönnimann, 1951 † (taxonomy source)
Asterocyclinidae Brönnimann, 1951 † (current name source)
Asymmetrinidae Brotzen, 1963 † (taxonomy source)
Asymmetrinidae Brotzen, 1963 † (current name source)
Auroriidae Loeblich & Tappan, 1986 † (current name source)
Auroriidae Loeblich & Tappan, 1986 † (taxonomy source)
Austrotrillinidae Loeblich & Tappan, 1986 † (current name source)
Austrotrillinidae Loeblich & Tappan, 1986 † (taxonomy source)
Axinidae Monticelli, 1903 (taxonomy source)
Baisalinidae Loeblich & Tappan, 1986 † (current name source)
Baisalinidae Loeblich & Tappan, 1986 † (additional source)
Bicotylophoridae Amato, 1994 accepted as Discocotylidae Price, 1936 (source of synonymy)
Biokovinidae Gušić, 1977 † (taxonomy source)
Biokovinidae Gušić, 1977 † (current name source)
Biseriamminidae Chernysheva, 1941 † (taxonomy source)
Biseriamminidae Chernysheva, 1941 † (current name source)
Bisphaera Birina, 1948 † (current name source)
Boreloididae Reiss, 1963 † (taxonomy source)
Boreloididae Reiss, 1963 † (current name source)
Borodinellaceae accepted as Chlorosarcinaceae Bourrelly ex Groover & Bold, 1969 (taxonomy source)
Bothitrematidae Price, 1936 (taxonomy source)
Botryococcaceae Wille, 1909 (taxonomy source)
Boultoniidae Skinner & Wilde, 1954 † (extant flag source)
Brachycladiidae Odhner, 1905 (taxonomy source)
Brachycytheridae Puri, 1954 accepted as Trachyleberididae Sylvester-Bradley, 1948 (source of synonymy)
Bradyinidae Reytlinger, 1950 † (taxonomy source)
Bradyinidae Reytlinger, 1950 † (current name source)
Bryopsidophyceae accepted as Ulvophyceae (source of synonymy)
Bubarida (extant flag source)
Bubarida (basis of record)
Bubarida (current name source)
Bubarida (habitat flag source)
Calceostomatidae Parona & Perugia, 1890 (taxonomy source)
Caligellidae Reytlinger, 1959 † (current name source)
Caligellidae Reytlinger, 1959 † (taxonomy source)
Callodistomidae Odhner, 1910 (taxonomy source)
Capsalidae Baird, 1853 (taxonomy source)
Capsalidea (basis of record)
Cassidulinitidae Saidova, 1981 † (taxonomy source)
Cassidulinitidae Saidova, 1981 † (current name source)
Cassigerinellidae Bolli, Loeblich & Tappan, 1957 † (taxonomy source)
Cassigerinellidae Bolli, Loeblich & Tappan, 1957 † (current name source)
Chaetopediaceae Skuja, 1948 accepted as Radiococcaceae Fott ex Komárek (source of synonymy)
Chapmaninidae Thalman, 1938 † (current name source)
Chapmaninidae Thalman, 1938 † (taxonomy source)
Characiaceae (taxonomy source)
Characiosiphonaceae (taxonomy source)
Charentiidae Loeblich & Tappan, 1985 † (taxonomy source)
Charentiidae Loeblich & Tappan, 1985 † (current name source)
Chimaericolidae Brinkmann, 1942 (taxonomy source)
Chimaericolidea (basis of record)
Chimaericolidea (extant flag source)
Chimaericolidea (habitat flag source)
Chimaericolidea (current name source)
Chlorangiopsidaceae accepted as Chlorangiellaceae Bourrelly ex Fott (source of synonymy)
Chlorochytriaceae (taxonomy source)
Chlorococcaceae (taxonomy source)
Chlorococcales accepted as Chlamydomonadales (source of synonymy)
Chlorocystidaceae accepted as Ulotrichaceae Kützing, 1843 (source of synonymy)
Chlorosarcinaceae Bourrelly ex Groover & Bold, 1969 (taxonomy source)
Chlorosarcinales accepted as Chlamydomonadales (source of synonymy)
Chlorosphaeraceae accepted as Chlorosarcinaceae Bourrelly ex Groover & Bold, 1969 (additional source)
Chlorotetras Gerneck, 1907 accepted as Planophila Gerneck, 1907 (source of synonymy)
Chrysothuramminidae Loeblich & Tappan, 1988 † (current name source)
Chrysothuramminidae Loeblich & Tappan, 1988 † (taxonomy source)
Codiolaceae accepted as Ulotrichaceae Kützing, 1843 (source of synonymy)
Coelastraceae accepted as Scenedesmaceae Oltmanns, 1904 (source of synonymy)
Coelodiscaceae accepted as Jaoaceae K.C. Fan, 1964 accepted as Ulvellaceae Schmidle, 1899 (source of synonymy)
Colaniellidae Fursenko, 1959 † (taxonomy source)
Colaniellidae Fursenko, 1959 † (current name source)
Coleitidae Loeblich & Tappan, 1984 † (taxonomy source)
Coleitidae Loeblich & Tappan, 1984 † (current name source)
Conorbinidae Reiss, 1963 † (current name source)
Conorbinidae Reiss, 1963 † (taxonomy source)
Conorboididae Thalmann, 1952 † (taxonomy source)
Conorboididae Thalmann, 1952 † (current name source)
Coskinolinidae Moullade, 1965 † (current name source)
Coskinolinidae Moullade, 1965 † (taxonomy source)
Cotyloplanidae Von Graff, 1896 accepted as Geoplanidae Stimpson, 1857 (source of synonymy)
Cribratinidae Loeblich & Tappan, 1964 † (taxonomy source)
Cribratinidae Loeblich & Tappan, 1964 † (current name source)
Cribrebella Gawar-Biedowa, 1989 † (current name source)
Cyclolinidae Loeblich & Tappan, 1964 † (taxonomy source)

 Nomenclatural status

 for Baicalospongia

orthographia [details]

 Nomenclatural status

 for Harrimanidae

orthographia [details]

 Nomenclatural status

 for Namibocypris

orthographia [details]

 Nomenclatural status

 for Phylctenophora

orthographia [details]

 Nomenclatural status

 for Polydeca

orthographia [details]

 Taxonomic remark

 for Acrumenidae Karling, 1980

Currently treated as subfamily of Cicerinidae, refer WoRMS. [details]

 Taxonomic remark

 for Chlorangiaceae Lemmermann

Type genus is a junior homonym, replacement name is Chlorangiella De Toni, 1889. [details]

 Taxonomic remark

 for Chlorangiellaceae Bourrelly ex Fott

Replacement name for Chlorangiaceae Lemmermann (latter is based on a preoccupied genus name) [details]

 Taxonomic remark

 for Chlorangiopsidaceae

The family name Chlorangiopsidaceae must be a synonym of Chlorangiellaceae Bourrelly ex Fott since its type genus, ... [details]

 Taxonomic remark

 for Coelastraceae

Currently treated as a subfamily of Scenedesmaceae, refer WoRMS. [details]

 Taxonomic remark

 for Diplozoidae Palombi, 1949

Authority also given as Tripathi, 1959 in some sources. [details]

 Taxonomic remark

 for Endothyranopsidae Reitlinger, 1958 †

Currently treated as subfamily, refer WoRMS. [details]

 Taxonomic remark

 for Kahlerinidae Leven, 1963 †

Currently treated as subfamily of Verbeekinidae, refer WoRMS. [details]

 Taxonomic remark

 for Leptomicrobothrium Dillon & Hargis, 1965

Erroneously listed as fossil in online version of Nomenclator Zoologicus (print version is correct). [details]

 Taxonomic remark

 for Megalonchidae

Family and sole included genus misspelled in Parker, 1982 (correct is Melanoncidae, based on genus Melanoncus). [details]

 Taxonomic remark

 for Namibocypris

Misspelling of Namibcypris. [details]

 Taxonomic remark

 for Neobivagina Dillon & Hargis, 1965

Erroneously flagged fossil in online version of Nomenclator Zoologicus (print version is correct). [details]

 Taxonomic remark

 for Orbitopsellidae Hottinger & Caus, 1982 †

Currently listed in WoRMS as subfamily of Mesoendothyridae. [details]

 Taxonomic remark

 for Paracyprididae Sars, 1923

Currently accepted as subfamily, refer WoRMS. [details]

 Taxonomic remark

 for Phylctenophora

Misspelling of Phlyctenophora [details]

 Taxonomic remark

 for Potamolepiidae

Spelling Potamolepiidae is technically correct based on type genus Potamolepis, however Potamolepidae is in more ... [details]

 Taxonomic remark

 for Spongillida

Originally as suborder (Spongillina); raised to order in Morrow & Cárdenas, 2015. [details]

 Taxonomic remark

 for Tetrasporales

Not included in Ruggiero et al., 2015, however is in WoRMS and AlgaeBase (2017 versions) [details]

 Taxonomic remark

 for Thaumantiadidae Gegenbauer, 1856

Name originally supplied to IRMNG as a fossil family including Protodipleurosoma, latter is presently treated ... [details]

 Taxonomic remark

 for Tournayellidae Dain, 1953 †

Authority given as Dain, 1953 in WoRMS, Glaessner, 1945 in Boudagher-Fadel, 2008; latter is possibly erroneous since ... [details]

 Taxonomic remark

 for Youngiopsis Lebedev, 1972

Erroneously listed as fossil in online version (only) of Nomenclator Zoologicus, correct in print version. [details]

 Taxonomic remark

 for Zoantharia

From WoRMS: Although Zoantharia Gray, 1832, has identical spelling with the supraordinal name Zoantharia de ... [details]