Opinions from R. Förster 1975
- 'Acanthoceras belongs to Acanthoceratinae'
- 'Acanthoceras (Parahoplites) gottschei belongs to Acanthoceras (Parahoplites)' according to Kilian 1902
- 'Acanthoceras (Parahoplites) gottschei is recombined as Cheloniceras gottschei'
- 'Acanthoceras bigoureti is recombined as Acanthohoplites bigoureti'
- 'Acanthoceras flexuosum belongs to Acanthoceras' according to Crick 1907
- 'Acanthoceras flexuosum belongs to Acanthoceras'
- 'Acanthoceras gortanii belongs to Acanthoceras' according to Venzo 1936
- 'Acanthoceras gortanii is a subjective synonym of Acanthoceras flexuosum'
- 'Acanthoceras indica belongs to Acanthoceras' according to Kossmat 1895
- 'Acanthoceras indica is recombined as Mantelliceras indicum'
- 'Acanthocerataceae belongs to Ammonitina'
- 'Acanthoceratidae belongs to Acanthocerataceae'
- 'Acanthoceratinae belongs to Acanthoceratidae'
- 'Acanthohoplites belongs to Acanthoplitinae'
- 'Acanthohoplitinae is corrected as Acanthoplitinae and belongs to Parahoplitidae'
- 'Aconeceras belongs to Aconeceratinae'
- 'Aconeceratidae was reranked as the subfamily Aconeceratinae and belongs to Oppeliidae'
- 'Ammonites argonautiformis is recombined as Stoliczkaia argonautiformis'
- 'Ammonites baborensis is recombined as Partschiceras baborense'
- 'Ammonites cristatus is recombined as Dipoloceras cristatum'
- 'Ammonites latidorsatus is recombined as Desmoceras (Desmoceras) latidorsatum'
- 'Ammonites mantelli is recombined as Mantelliceras mantelli'
- 'Ammonites rhotomagensis is recombined as Acanthoceras rhotomagense'
- 'Ammonites saxbii is recombined as Mantelliceras saxbii'
- 'Ammonites tuberculata belongs to Ammonites' according to Mantell 1822
- 'Ammonites tuberculata is recombined as Mantelliceras tuberculatum'
- 'Ammonitina belongs to Ammonoidea'
- 'Ammonitoceras belongs to Ancyloceratidae'
- 'Ancyloceras ackermanni belongs to Ancyloceras' according to Krenkel 1910
- 'Ancyloceras ackermanni is recombined as Ammonitoceras ackermanni'
- 'Ancyloceras mozambiquense belongs to Ancyloceras' according to Krenkel 1910
- 'Ancyloceras mozambiquense is recombined as Australiceras mozambiquense'
- 'Ancyloceras thiollierei is recombined as Crioceratites (Emericiceras) thiollierei'
- 'Ancylocerataceae belongs to Ancyloceratina'
- 'Ancyloceratidae belongs to Ancylocerataceae'
- 'Ancyloceratina belongs to Ammonoidea'
- 'Anisoceras belongs to Anisoceratinae'
- 'Anisoceras was reranked as Hamites (Anisoceras) and belongs to Hamites' according to Boule et al. 1907
- 'Anisoceratidae belongs to Ancylocerataceae'
- 'Anisoceratinae belongs to Anisoceratidae'
- 'Argonauticeras besairiei is a subjective synonym of Argonauticeras belliseptatum'
- 'Askoloboceras fastigatum is a subjective synonym of Hysteroceras choffati'
- 'Australiceras belongs to Ancyloceratidae'
- 'Australiceras hirtzi is a subjective synonym of Ammonitoceras pavlowi'
- 'Australiceras ramboulai belongs to Australiceras' according to Collignon 1962
- 'Australiceras ramboulai is recombined as Ammonitoceras ramboulai'
- 'Baculites belongs to Baculitinae'
- 'Baculites boulei belongs to Baculites' according to Collignon 1931
- 'Baculites boulei belongs to Baculites'
- 'Baculitidae belongs to Ancylocerataceae'
- 'Baculitinae belongs to Baculitidae'
- 'Beudanticeras belongs to Beudanticeratinae'
- 'Beudanticeras hirtzi belongs to Beudanticeras' according to Collignon 1950
- 'Beudanticeras hirtzi belongs to Beudanticeras'
- 'Beudanticeratinae belongs to Desmoceratidae'
- 'Brancoceras orbignyi is recombined as Hysteroceras orbignyi'
- 'Brancoceratidae belongs to Acanthocerataceae'
- 'Brancoceratinae belongs to Brancoceratidae'
- 'Cainoceras salebrosum belongs to Cainoceras' according to van Hoepen 1942
- 'Cainoceras salebrosum is a subjective synonym of Prohysteroceras (Goodhallites) gracillimum'
- 'Cheloniceras belongs to Cheloniceratidae'
- 'Cheloniceras moraisi belongs to Cheloniceras' according to Henriques da Silva 1962
- 'Cheloniceras moraisi is a subjective synonym of Cheloniceras neivai'
- 'Cheloniceras neivai belongs to Cheloniceras' according to Henriques da Silva 1962
- 'Cheloniceras neivai belongs to Cheloniceras'
- 'Cheloniceras sornayi belongs to Cheloniceras' according to Henriques da Silva 1962
- 'Cheloniceras sornayi belongs to Cheloniceras'
- 'Cheloniceratinae was reranked as the family Cheloniceratidae and belongs to Douvilleicerataceae'
- 'Crioceras joffrei is recombined as Myloceras joffrei'
- 'Crioceras pavlowi is recombined as Ammonitoceras pavlowi'
- 'Crioceras ramososeptatum is recombined as Australiceras ramososeptatum'
- 'Crioceras subsimbirskense belongs to Crioceras' according to Sinzow 1925
- 'Crioceras subsimbirskense is recombined as Tropaeum subsimbirskense'
- 'Crioceratites belongs to Ancyloceratidae'
- 'Cymatoceras belongs to Nautilinae'
- 'Deiradoceras was reranked as Mortoniceras (Deiradoceras) and belongs to Mortoniceras'
- 'Deiradoceras besairiei belongs to Deiradoceras' according to Collignon 1950
- 'Deiradoceras besairiei is a subjective synonym of Mortoniceras (Deiradoceras) bispinosum'
- 'Deiradoceras exile is a subjective synonym of Mortoniceras (Deiradoceras) prerostratum'
- 'Deiradoceras fibulatum belongs to Deiradoceras' according to Collignon 1950
- 'Deiradoceras fibulatum is a subjective synonym of Mortoniceras (Deiradoceras) bispinosum'
- 'Desmoceras belongs to Desmoceratinae'
- 'Desmoceras (Desmoceras) belongs to Desmoceras'
- 'Desmoceras falcistriatum belongs to Desmoceras' according to Anthula 1899
- 'Desmoceras falcistriatum is recombined as Valdedorsella falcistriata'
- 'Desmoceratidae belongs to Hoplitaceae'
- 'Desmoceratinae belongs to Desmoceratidae'
- 'Dipoloceras belongs to Mojsisovicziinae'
- 'Dipoloceras (Rhytidoceras) trifurcatum belongs to Dipoloceras (Rhytidoceras)' according to Collignon 1951
- 'Dipoloceras (Rhytidoceras) trifurcatum is a subjective synonym of Prohysteroceras elegans'
- 'Douvilleiceras delagoense belongs to Douvilleiceras' according to Krenkel 1912
- 'Douvilleiceras delagoense is recombined as Cheloniceras delagoense'
- 'Douvilleiceras subnodosocostatum belongs to Douvilleiceras' according to Sinzow 1906
- 'Douvilleiceras subnodosocostatum is recombined as Cheloniceras subnodosocostatum'
- 'Douvilleiceras tschernyschewi is recombined as Cheloniceras tschernyschewi'
- 'Douvilleicerataceae belongs to Ancyloceratina'
- 'Drepanoceras is a subjective synonym of Prohysteroceras'
- 'Drepanoceras rudis belongs to Drepanoceras' according to van Hoepen 1931
- 'Drepanoceras rudis is a subjective synonym of Prohysteroceras elegans'
- 'Drepanoceras undatum belongs to Drepanoceras' according to van Hoepen 1941
- 'Drepanoceras undatum is a subjective synonym of Prohysteroceras elegans'
- 'Emericiceras was reranked as Crioceratites (Emericiceras) and belongs to Crioceratites'
- 'Goodhallites was reranked as Prohysteroceras (Goodhallites) and belongs to Prohysteroceras'
- 'Hamites belongs to Ptychoceratinae'
- 'Hamites (Anisoceras) raynaudi belongs to Hamites (Anisoceras)' according to Boule et al. 1907
- 'Hamites (Anisoceras) raynaudi is recombined as Anisoceras raynaudi'
- 'Hamites (Hamites) belongs to Hamites'
- 'Hamites baculoides is recombined as Sciponoceras baculoides'
- 'Hamites charpentieri is recombined as Hamites (Hamites) charpentieri'
- 'Hamites virgulatus is recombined as Hamites (Hamites) virgulatus'
- 'Haplocerataceae belongs to Ammonitina'
- 'Hoplitaceaea is corrected as Hoplitaceae and belongs to Ammonitina'
- 'Hypengonoceras belongs to Placenticeratidae'
- 'Hypengonoceras decaryi belongs to Hypengonoceras'
- 'Hypoturrilites belongs to Turrilitinae'
- 'Hysteroceras belongs to Brancoceratinae'
- 'Hysteroceras carinatum belongs to Hysteroceras'
- 'Hysteroceras choffati belongs to Hysteroceras'
- 'Hysteroceras subbinum belongs to Hysteroceras'
- 'Inflaticeras africanum belongs to Inflaticeras' according to Spath 1925
- 'Inflaticeras africanum is a subjective synonym of Mortoniceras (Deiradoceras) bispinosum'
- 'Inflaticeras recticostatum belongs to Inflaticeras' according to Spath 1925
- 'Inflaticeras recticostatum is recombined as Mortoniceras (Mortoniceras) recticostatum'
- 'Komeceras lineatocostatum belongs to Komeceras' according to van Hoepen 1944
- 'Komeceras lineatocostatum is a subjective synonym of Mortoniceras (Cantabrigites) cantabrigense'
- 'Labeceras belongs to Labeceratinae'
- 'Labeceras (Appurdiceras) belongs to Labeceras'
- 'Labeceras bryani belongs to Labeceras'
- 'Labeceras bryani acuticostatum belongs to Labeceras bryani'
- 'Labeceras crassicostatum belongs to Labeceras'
- 'Labeceras crassicostatum belongs to Labeceras' according to Collignon 1962
- 'Labeceras inflatum belongs to Labeceras'
- 'Labeceras plasticum belongs to Labeceras' according to Spath 1925
- 'Labeceras plasticum belongs to Labeceras'
- 'Labeceratidae was reranked as the subfamily Labeceratinae and belongs to Anisoceratidae'
- 'Lyelliceratidae belongs to Acanthocerataceae'
- 'Lytoceras belongs to Lytoceratidae'
- 'Lytoceras (Argonauticeras) was reranked as Argonauticeras and belongs to Lytoceratidae'
- 'Lytoceras (Tetragonites) was reranked as Tetragonites and belongs to Tetragonitidae'
- 'Lytoceras belliseptatum belongs to Lytoceras' according to Anthula 1899
- 'Lytoceras belliseptatum is recombined as Argonauticeras belliseptatum'
- 'Lytoceras crebrisulcatum is recombined as Protetragonites crebrisulcatus'
- 'Lytoceras vogdti belongs to Lytoceras' according to Karakasch 1907
- 'Lytoceras vogdti belongs to Lytoceras'
- 'Lytocerataceae belongs to Lytoceratina'
- 'Lytoceratidae belongs to Lytocerataceae'
- 'Lytoceratina belongs to Ammonoidea'
- 'Mantelliceras belongs to Mantelliceratinae'
- 'Mantelliceras hyatti belongs to Mantelliceras' according to Spath 1925
- 'Mantelliceras hyatti is a subjective synonym of Mantelliceras saxbii'
- 'Mantelliceratinae belongs to Acanthoceratidae'
- 'Mariella belongs to Turrilitinae'
- 'Mariella (Mariella) belongs to Mariella'
- 'Mojsisovicziinae belongs to Brancoceratidae'
- 'Mortoniceras belongs to Mortoniceratinae'
- 'Mortoniceras (Cantabrigites) belongs to Mortoniceras'
- 'Mortoniceras (Cantabrigites) cantabrigense belongs to Mortoniceras (Cantabrigites)' according to Spath 1933
- 'Mortoniceras (Cantabrigites) cantabrigense belongs to Mortoniceras (Cantabrigites)'
- 'Mortoniceras (Deiradoceras) albense is recombined as Mortoniceras (Mortoniceras) albense'
- 'Mortoniceras (Deiradoceras) devonense belongs to Mortoniceras (Deiradoceras)'
- 'Mortoniceras (Mortoniceras) belongs to Mortoniceras'
- 'Mortoniceratinae belongs to Brancoceratidae'
- 'Myloceras belongs to Labeceratinae'
- 'Myloceras amaltheia belongs to Myloceras' according to Spath 1925
- 'Myloceras amaltheia is a subjective synonym of Myloceras cornucopium'
- 'Myloceras cornucopia is corrected as Myloceras cornucopium and belongs to Myloceras'
- 'Myloceras serotinum belongs to Myloceras' according to Spath 1925
- 'Myloceras serotinum belongs to Myloceras'
- 'Nautilus manuanensis belongs to Nautilus' according to Crick 1907
- 'Nautilus manuanensis is recombined as Cymatoceras manuanensis'
- 'Nautilus neckerianus is recombined as Cymatoceras neckerianum'
- 'Nolaniceras was reranked as Acanthohoplites (Nolaniceras) and belongs to Acanthohoplites'
- 'Oppelia nisoides belongs to Oppelia' according to Sarasin 1893
- 'Oppelia nisoides is recombined as Aconeceras nisoides'
- 'Oppeliidae belongs to Haplocerataceae'
- 'Ostlingoceras belongs to Turrilitinae'
- 'Ostlingoceras (Ostlingoceras) belongs to Ostlingoceras'
- 'Oxytropidoceras belongs to Mojsisovicziinae'
- 'Pagoceras is a subjective synonym of Mortoniceras'
- 'Pagoceras simum belongs to Pagoceras' according to van Hoepen 1951
- 'Pagoceras simum is a subjective synonym of Mortoniceras (Mortoniceras) ornatum'
- 'Parahoplites was reranked as Acanthoceras (Parahoplites) and belongs to Acanthoceras' according to Kilian 1902
- 'Parahoplites aschiltaensis is recombined as Acanthohoplites aschiltaensis'
- 'Parahoplites uhligi is recombined as Acanthohoplites (Nolaniceras) uhligi'
- 'Parahoplitidae belongs to Douvilleicerataceae'
- 'Partschiceras belongs to Phylloceratidae'
- 'Pervinquieria ornata belongs to Pervinquieria' according to van Hoepen 1944
- 'Pervinquieria ornata is recombined as Mortoniceras (Mortoniceras) ornatum'
- 'Phylloceras belongs to Phylloceratidae'
- 'Phylloceras (Euphylloceras) vohipalense is recombined as Phylloceras (Hypophylloceras) seresitense vohipalense'
- 'Phylloceras (Hypophylloceras) belongs to Phylloceras'
- 'Phylloceras boulei belongs to Phylloceras' according to Collignon 1928
- 'Phylloceras boulei is recombined as Phylloceras (Hypophylloceras) seresitense boulei'
- 'Phylloceras broilii belongs to Phylloceras' according to Krenkel 1910
- 'Phylloceras broilii is a subjective synonym of Partschiceras baborense'
- 'Phylloceras velledae seresitense is recombined as Phylloceras (Hypophylloceras) seresitense'
- 'Phyllocerataceae belongs to Phylloceratina'
- 'Phylloceratidae belongs to Phyllocerataceae'
- 'Phylloceratitida was reranked as the suborder Phylloceratina and belongs to Ammonoidea'
- 'Phyllopachyceras crassum belongs to Phyllopachyceras' according to Druschtschitz 1956
- 'Phyllopachyceras crassum is a subjective synonym of Partschiceras baborense'
- 'Phyllopachyceras ectocostatum is a subjective synonym of Partschiceras baborense'
- 'Placenticeratidae belongs to Hoplitaceae'
- 'Prohysteroceras belongs to Mortoniceratinae'
- 'Prohysteroceras (Goodhallites) besakatrense belongs to Prohysteroceras (Goodhallites)' according to Collignon 1963
- 'Prohysteroceras (Goodhallites) besakatrense belongs to Prohysteroceras (Goodhallites)'
- 'Protetragonites belongs to Lytoceratidae'
- 'Protetragonites mediocris belongs to Protetragonites' according to Druschtschitz 1956
- 'Protetragonites mediocris is a subjective synonym of Protetragonites crebrisulcatus'
- 'Pseudotetragonites kudrjavzevi belongs to Pseudotetragonites' according to Drushchitz 1956
- 'Pseudotetragonites kudrjavzevi is recombined as Argonauticeras kudrjavzevi'
- 'Ptychoceratidae was reranked as the subfamily Ptychoceratinae and belongs to Baculitidae'
- 'Puzosia belongs to Puzosiinae'
- 'Puzosia crebrisulcata belongs to Puzosia'
- 'Puzosiinae belongs to Desmoceratidae'
- 'Rhytidoceras elegans is recombined as Prohysteroceras elegans'
- 'Scaphites hillsi belongs to Scaphites' according to Sowerby 1836
- 'Scaphites hillsi is recombined as Tropaeum hillsi'
- 'Schloenbachia aequatorealis belongs to Schloenbachia' according to Kossmat 1895
- 'Schloenbachia aequatorealis is recombined as Mortoniceras (Mortoniceras) aequatorealis'
- 'Schloenbachia gracilima is recombined as Prohysteroceras (Goodhallites) gracillimum'
- 'Sciponoceras belongs to Baculitinae'
- 'Stoliczkaia belongs to Lyelliceratidae'
- 'Subschloenbachia bispinosa is recombined as Mortoniceras (Deiradoceras) bispinosum'
- 'Subschloenbachia prerostrata is recombined as Mortoniceras (Deiradoceras) prerostratum'
- 'Terasceras is a subjective synonym of Hysteroceras'
- 'Terasceras falcatum belongs to Terasceras' according to van Hoepen 1944
- 'Terasceras falcatum is a subjective synonym of Hysteroceras subbinum'
- 'Terasceras improvisum belongs to Terasceras' according to van Hoepen 1944
- 'Terasceras improvisum is a subjective synonym of Hysteroceras orbignyi'
- 'Terasceras pseudofalcatum belongs to Terasceras' according to van Hoepen 1944
- 'Terasceras pseudofalcatum is a subjective synonym of Hysteroceras subbinum'
- 'Terasceras subfalcatum belongs to Terasceras' according to van Hoepen 1944
- 'Terasceras subfalcatum is a subjective synonym of Hysteroceras orbignyi'
- 'Tetragonitaceae belongs to Lytoceratina'
- 'Tetragonites blaisoni is a subjective synonym of Tetragonites collignoni'
- 'Tetragonites blaisoni belongs to Tetragonites' according to Collignon 1964
- 'Tetragonites collignoni belongs to Tetragonites' according to Breistroffer 1940
- 'Tetragonites collignoni belongs to Tetragonites'
- 'Tetragonites subtimotheanus is a subjective synonym of Tetragonites collignoni'
- 'Tetragonitidae belongs to Tetragonitaceae'
- 'Toxoceratoides belongs to Ancyloceratidae'
- 'Toxoceratoides krenkeli belongs to Toxoceratoides'
- 'Tropaeum belongs to Ancyloceratidae'
- 'Turrilites belongs to Turrilitinae'
- 'Turrilites (Turrilites) belongs to Turrilites'
- 'Turrilites acutus is recombined as Turrilites (Turrilites) acutus'
- 'Turrilites bergeri is recombined as Mariella (Mariella) bergeri'
- 'Turrilites carcitanensis is recombined as Hypoturrilites carcitanensis'
- 'Turrilites costata is recombined as Turrilites (Turrilites) costatus'
- 'Turrilites gravesianus is recombined as Hypoturrilites gravesianus'
- 'Turrilites miliaris belongs to Turrilites' according to Pictet and Campiche 1861
- 'Turrilites miliaris is recombined as Mariella (Mariella) miliaris'
- 'Turrilites oehlerti is recombined as Mariella (Mariella) oehlerti'
- 'Turrilites rorayensis is recombined as Ostlingoceras (Ostlingoceras) rorayensis'
- 'Turrilitidae belongs to Ancylocerataceae'
- 'Turrilitinae belongs to Turrilitidae'
- 'Valdedorsella belongs to Puzosiinae'
- 'Valdedorsella nunesi belongs to Valdedorsella' according to Henriques da Silva 1962
- 'Valdedorsella nunesi is a subjective synonym of Valdedorsella falcistriata'
- 'Venezoliceras was reranked as Oxytropidoceras (Venezoliceras) and belongs to Oxytropidoceras'
- 'Venezoliceras madagascariense is recombined as Oxytropidoceras (Venezoliceras) madagascariense'