Opinions from M. K. Howarth 2013

  • 'Abbasites belongs to Erycitinae'
  • 'Acanthopleuroceras belongs to Tropidoceratinae'
  • 'Acanthopleuroceratinae is a subjective synonym of Tropidoceratinae'
  • 'Accardia is a subjective synonym of Hammatoceras'
  • 'Aegasteroceras belongs to Asteroceratinae'
  • 'Aegoceras belongs to Liparoceratidae'
  • 'Aegoceras (Aegoceras) belongs to Aegoceras'
  • 'Aegoceras (Aegoceras) belongs to Aegoceras' according to Waagen 1869
  • 'Aetomoceras is a subjective synonym of Agassiceras'
  • 'Agassiceras belongs to Agassiceratinae'
  • 'Agassiceratidae was reranked as the family Agassiceratinae and belongs to Arietitidae'
  • 'Vermiceras (Alpinoceras) is a subjective synonym of Vermiceras (Paracaloceras)'
  • 'Alsatites belongs to Alsatitinae'
  • 'Alsatitidae was reranked as the family Alsatitinae and belongs to Arietitidae'
  • 'Alsatitidae belongs to Psilocerataceae' according to Spath 1924
  • 'Alsatitoides is a subjective synonym of Gonioptychoceras'
  • 'Amaltheidae belongs to Eoderoceratoidea'
  • 'Amaltheus belongs to Amaltheidae'
  • 'Amaltheus (Amaltheus) belongs to Amaltheus' according to de Montfort 1808
  • 'Amaltheus (Amaltheus) belongs to Amaltheus'
  • 'Amaltheus (Pseudoamaltheus) belongs to Amaltheus' according to Frebold 1922
  • 'Amaltheus (Pseudoamaltheus) belongs to Amaltheus'
  • 'Amauroceras belongs to Amaltheidae'
  • 'Ambersites is a subjective synonym of Abbasites'
  • 'Amblycoceras is an objective synonym of Aegoceras'
  • 'Ammonites algovianus is recombined as Arieticeras algovianum'
  • 'Ammonites centriglobus is recombined as Metacymbites centriglobus'
  • 'Ammonites gumbrechti is recombined as Jamesonites gumbrechti'
  • 'Ammonites riparius is recombined as Riparioceras riparius'
  • 'Ammonites subangularis belongs to Ammonites' according to Oppel 1862
  • 'Ammonites subangularis is recombined as Curviceras subangularis'
  • 'Ammonites zitteli is recombined as Septimaniceras zitteli'
  • 'Ammonitida belongs to Ammonoidea'
  • 'Ammonitina belongs to Ammonitida'
  • 'Ancolioceras is a subjective synonym of Leioceras'
  • 'Andicoeloceras belongs to Coeloceratidae'
  • 'Andidiscus belongs to Fanninoceratinae'
  • 'Androgynoceras belongs to Liparoceratidae'
  • 'Anguidactylites is a subjective synonym of Dactylioceras'
  • 'Angulaticeras belongs to Schlotheimiidae'
  • 'Anguliferites is a subjective synonym of Schlotheimia'
  • 'Anolkoleiites is a subjective synonym of Witchellia'
  • 'Apedogyria is a subjective synonym of Brasilia'
  • 'Apoderoceras belongs to Coeloceratidae'
  • 'Arcidactylites is a subjective synonym of Dactylioceras'
  • 'Arctoasteroceras belongs to Asteroceratinae'
  • 'Arctomercaticeras belongs to Arieticeratinae'
  • 'Argoceras is a subjective synonym of Angulaticeras'
  • 'Argutarpites is a subjective synonym of Protogrammoceras'
  • 'Arieticeras belongs to Arieticeratinae'
  • 'Arieticeras is a nomen vanum'
  • 'Arieticeratinae belongs to Hildoceratidae'
  • 'Arietitacea is a subjective synonym of Psiloceratoidea'
  • 'Arietites was reranked as Coroniceras (Arietites) and belongs to Coroniceras'
  • 'Arietitidae belongs to Psiloceratoidea'
  • 'Arietitinae belongs to Arietitidae'
  • 'Arnioceras belongs to Arietitinae'
  • 'Arnioceratidae is a subjective synonym of Arietitinae'
  • 'Arnioceratoides is a subjective synonym of Coroniceras'
  • 'Arniotites is a subjective synonym of Arnioceras'
  • 'Asaphoceras is a subjective synonym of Hypasteroceras'
  • 'Asteroceras belongs to Asteroceratinae'
  • 'Asteroceratidae was reranked as the subfamily Asteroceratinae and belongs to Arietitidae'
  • 'Asthenoceras belongs to Witchelliinae'
  • 'Atacamiceras belongs to Hildoceratinae'
  • 'Athlodactylites is a subjective synonym of Dactylioceras'
  • 'Austromorphites is a subjective synonym of Fanninoceras'
  • 'Aveyroniceras is a subjective synonym of Reynesoceras'
  • 'Badouxia belongs to Psiloceratinae'
  • 'Bagnolites belongs to Asteroceratinae'
  • 'Bakonyceras belongs to Coeloceratidae'
  • 'Bartoliniceras belongs to Arietitidae'
  • 'Bassaniceras is an objective synonym of Protogrammoceras'
  • 'Beaniceras was reranked as Aegoceras (Beaniceras) and belongs to Aegoceras'
  • 'Becheiceras was reranked as Liparoceras (Becheiceras) and belongs to Liparoceras'
  • 'Bettoniceras belongs to Reynesocoeloceratinae'
  • 'Bifericeras belongs to Eoderoceratinae'
  • 'Boucaulticeras is a subjective synonym of Angulaticeras'
  • 'Bouleiceras belongs to Bouleiceratinae'
  • 'Bouleiceratinae belongs to Hildoceratidae'
  • 'Brasilia belongs to Graphoceratinae'
  • 'Brasilina is a subjective synonym of Brasilia'
  • 'Braunsella is a subjective synonym of Hyperlioceras'
  • 'Braunsina is a subjective synonym of Hyperlioceras'
  • 'Bredyia belongs to Hammatoceratinae'
  • 'Brodiceras is an objective synonym of Brodieia'
  • 'Brodieia belongs to Phymatoceratidae'
  • 'Buckmanites is a subjective synonym of Pseudolioceras'
  • 'Burkhardticeras is a subjective synonym of Arnioceras'
  • 'Burtonia is replaced by Bredyia'
  • 'Caenisites belongs to Asteroceratinae'
  • 'Cagliceras belongs to Erycitinae'
  • 'Caleites is a subjective synonym of Polymorphites'
  • 'Caloceras belongs to Psiloceratinae'
  • 'Caloceratidae is a subjective synonym of Psiloceratidae'
  • 'Canavarella belongs to Leioceratinae'
  • 'Canavaria belongs to Arieticeratinae'
  • 'Canavaria is replaced by Canavarina'
  • 'Canavarina is a subjective synonym of Pleydellia'
  • 'Canavarites belongs to Alsatitinae'
  • 'Cancelliceras is a subjective synonym of Hypasteroceras'
  • 'Capreoliceras belongs to Phricodoceratidae'
  • 'Carixiceras is a subjective synonym of Radstockiceras'
  • 'Catacoeloceras belongs to Dactylioceratinae'
  • 'Catriceras belongs to Tropidoceratinae'
  • 'Catulloceras belongs to Grammoceratinae'
  • 'Ceccaites is a subjective synonym of Euaptetoceras'
  • 'Vermiceras (Centauroceras) is a subjective synonym of Vermiceras (Paracaloceras)'
  • 'Cetonoceras belongs to Reynesocoeloceratinae'
  • 'Charmasseiceras is a subjective synonym of Angulaticeras'
  • 'Chartronia is a subjective synonym of Hammatoceras'
  • 'Cheltonia belongs to Oxynoticeratidae'
  • 'Cingolites is a subjective synonym of Hildaites'
  • 'Cingolites clavatus is recombined as Hildaites clavatus'
  • 'Cingolites spiralis is recombined as Hildaites spiralis'
  • 'Claviceras is a subjective synonym of Euagassiceras'
  • 'Cleviceras belongs to Harpoceratinae'
  • 'Coeloceras belongs to Coeloceratidae'
  • 'Coeloceratidae belongs to Eoderoceratoidea'
  • 'Coeloderoceras is a subjective synonym of Villania'
  • 'Colcanapites is a subjective synonym of Bouleiceras'
  • 'Collina belongs to Dactylioceratinae'
  • 'Collinites is a subjective synonym of Collina'
  • 'Coroniceras belongs to Arietitinae'
  • 'Cosmogyria is a subjective synonym of Ludwigia'
  • 'Costiceras is a subjective synonym of Canavarella'
  • 'Costigrammoceras is a subjective synonym of Grammoceras'
  • 'Costileioceras belongs to Leioceratinae'
  • 'Cotteswoldia is a subjective synonym of Pleydellia'
  • 'Crassiceras belongs to Phymatoceratidae'
  • 'Crassicoeloceras is a subjective synonym of Nodicoeloceras'
  • 'Crestaites belongs to Hammatoceratinae'
  • 'Crickia is a subjective synonym of Ludwigia'
  • 'Crucilobiceras belongs to Eoderoceratinae'
  • 'Csernyeiceras is a subjective synonym of Euaptetoceras'
  • 'Curviceras is a subjective synonym of Waehneroceras'
  • 'Curvidactylites is a subjective synonym of Dactylioceras'
  • 'Cylicoceras belongs to Leioceratinae'
  • 'Cymbites belongs to Cymbitidae'
  • 'Cymbitidae belongs to Psiloceratoidea'
  • 'Cypholioceras is a subjective synonym of Leioceras'
  • 'Dactylioceras belongs to Dactylioceratinae'
  • 'Dactylioceras (Dactylioceras) belongs to Dactylioceras' according to Hyatt 1867
  • 'Dactylioceras (Dactylioceras) belongs to Dactylioceras'
  • 'Dactylioceras (Iranodactylites) belongs to Dactylioceras' according to Repin 2000
  • 'Dactylioceras (Iranodactylites) belongs to Dactylioceras'
  • 'Dactylioceratidae belongs to Eoderoceratoidea'
  • 'Dactylioceratinae belongs to Dactylioceratidae'
  • 'Dactylogrammites is a subjective synonym of Catulloceras'
  • 'Dalaticeras is a subjective synonym of Vermiceras'
  • 'Darellella is a subjective synonym of Fontannesia'
  • 'Darellia is a subjective synonym of Hyperlioceras'
  • 'Darellina is a subjective synonym of Hyperlioceras'
  • 'Dayiceras belongs to Tropidoceratinae'
  • 'Defossiceras is a subjective synonym of Aegoceras'
  • 'Deltoidoceras is a subjective synonym of Hyperlioceras'
  • 'Deltotoceras is a subjective synonym of Hyperlioceras'
  • 'Denckmannia is a subjective synonym of Phymatoceras'
  • 'Depaoceras is a subjective synonym of Graphoceras'
  • 'Deroceras is replaced by Eteoderoceras'
  • 'Deroceratidae is a subjective synonym of Eoderoceratidae'
  • 'Diaphorites is a subjective synonym of Praesphaeroceras'
  • 'Diplesioceras belongs to Hildoceratoidea'
  • 'Diplosellites is a subjective synonym of Vermiceras'
  • 'Discamphiceras belongs to Discamphiceratinae'
  • 'Discamphiceratinae belongs to Psiloceratidae'
  • 'Discoceras is replaced by Vermiceras'
  • 'Dissoroceras is a subjective synonym of Hyperlioceras'
  • 'Dorsetensia belongs to Sonniniinae'
  • 'Dubariceras belongs to Eoderoceratinae'
  • 'Dubariceratidae is a subjective synonym of Eoderoceratidae'
  • 'Dumortieria belongs to Grammoceratinae'
  • 'Dumortieriinae is a subjective synonym of Grammoceratinae'
  • 'Dundryites is a subjective synonym of Sonninites'
  • 'Echioceras belongs to Echioceratidae'
  • 'Echioceratidae belongs to Psiloceratoidea'
  • 'Echioceratoides is a subjective synonym of Paltechioceras'
  • 'Eleganticeras belongs to Harpoceratinae'
  • 'Elegantuliceras is a subjective synonym of Eleganticeras'
  • 'Emaciaticeras belongs to Arieticeratinae'
  • 'Encycloceras is a subjective synonym of Angulaticeras'
  • 'Eoamaltheus belongs to Fanninoceratinae'
  • 'Eodactylites is a subjective synonym of Dactylioceras'
  • 'Eoderoceras belongs to Eoderoceratinae'
  • 'Eoderocerataceae is corrected as Eoderoceratoidea and belongs to Ammonitina'
  • 'Eoderoceratidae belongs to Eoderoceratoidea'
  • 'Eoderoceratinae belongs to Eoderoceratidae'
  • 'Eofuciniceras is a subjective synonym of Fuciniceras'
  • 'Eoprotogrammoceras is a subjective synonym of Protogrammoceras'
  • 'Epammonites is a subjective synonym of Coroniceras'
  • 'Eparietites belongs to Asteroceratinae'
  • 'Eparnioceras is a subjective synonym of Arnioceras'
  • 'Epechioceras is a subjective synonym of Paltechioceras'
  • 'Epideroceras is a subjective synonym of Villania'
  • 'Epideroceras (Pseuduptonia) was reranked as Pseuduptonia and belongs to Phricodoceratidae'
  • 'Epideroceratidae is a subjective synonym of Phricodoceratidae'
  • 'Epophioceras belongs to Asteroceratinae'
  • 'Erbenites is replaced by Euerbenites'
  • 'Eremiticeras is a subjective synonym of Tropidoceras'
  • 'Erycites belongs to Erycitinae'
  • 'Abbasitoides is a subjective synonym of Erycites'
  • 'Erycitidae was reranked as the subfamily Erycitinae and belongs to Hammatoceratidae'
  • 'Erycitoides belongs to Hammatoceratinae'
  • 'Esericeras belongs to Phymatoceratidae'
  • 'Eteoderoceras belongs to Eoderoceratinae'
  • 'Euagassiceras belongs to Agassiceratinae'
  • 'Euaptetoceras belongs to Hammatoceratinae'
  • 'Euasteroceras is a subjective synonym of Caenisites'
  • 'Eucoroniceras was reranked as Coroniceras (Eucoroniceras) and belongs to Coroniceras'
  • 'Eudmetoceras belongs to Hammatoceratinae'
  • 'Euechioceras is a subjective synonym of Paltechioceras'
  • 'Euerbenites belongs to Asteroceratinae'
  • 'Euhoploceras was reranked as Sonninia (Euhoploceras) and belongs to Sonninia'
  • 'Falcifericeras is an objective synonym of Harpoceras'
  • 'Fanninoceras belongs to Fanninoceratinae'
  • 'Fanninoceras (Charlotticeras) belongs to Fanninoceras'
  • 'Fanninoceras (Fanninoceras) belongs to Fanninoceras'
  • 'Fanninoceratinae belongs to Eoderoceratidae'
  • 'Farinaccites is a subjective synonym of Dubariceras'
  • 'Fastigiceras is a subjective synonym of Radstockiceras'
  • 'Fibulocoeloceras is a subjective synonym of Nodicoeloceras'
  • 'Fieldingia is replaced by Fieldingiceras' according to Wiedenmayer 1980
  • 'Fieldingiceras was reranked as Protogrammoceras (Fieldingiceras) and belongs to Protogrammoceras'
  • 'Fissilobiceras belongs to Hammatoceratinae'
  • 'Foetterleiceras belongs to Phricodoceratidae'
  • 'Fontanelliceras belongs to Arieticeratinae'
  • 'Fontannesia belongs to Witchelliinae'
  • 'Franziceras belongs to Psiloceratinae'
  • 'Frechiella belongs to Bouleiceratinae'
  • 'Achilleia is a subjective synonym of Frechiella'
  • 'Frechiella (Achilleia) belongs to Frechiella' according to Renz 1913
  • 'Fuciniceras belongs to Protogrammoceratinae'
  • 'Furlites is a subjective synonym of Gemmellaroceras'
  • 'Furlites involutus is recombined as Gemmellaroceras involutum'
  • 'Furlitinae is a subjective synonym of Polymorphitinae'
  • 'Furloceras belongs to Phymatoceratidae'
  • 'Gabillytes is a subjective synonym of Zugodactylites'
  • 'Gagaticeras belongs to Echioceratidae'
  • 'Gallitellia is a subjective synonym of Harpoceras'
  • 'Geczya is a subjective synonym of Arieticeras'
  • 'Geczyceras is a subjective synonym of Hammatoceras'
  • 'Gelasinites is a subjective synonym of Witchellia'
  • 'Gemmellaroceras belongs to Polymorphitinae'
  • 'Geyeria is replaced by Geyerina'
  • 'Geyerina is a subjective synonym of Cylicoceras'
  • 'Gleviceras belongs to Oxynoticeratidae'
  • 'Glevumites is a subjective synonym of Gleviceras'
  • 'Glyptarpites is a subjective synonym of Harpoceras'
  • 'Goniohildoceras is a subjective synonym of Hildoceras'
  • 'Gonioptychoceras belongs to Alsatitinae'
  • 'Gorgheiceras is a subjective synonym of Polymorphites'
  • 'Grammoceras belongs to Grammoceratinae'
  • 'Grammoceratinae belongs to Hildoceratidae'
  • 'Graphoceras belongs to Graphoceratinae'
  • 'Graphoceratidae belongs to Hildoceratoidea'
  • 'Graphoceratinae belongs to Graphoceratidae'
  • 'Gruneria is a subjective synonym of Phlyseogrammoceras'
  • 'Guexiceras was reranked as Coroniceras (Guexiceras) and belongs to Coroniceras'
  • 'Guhsania belongs to Witchelliinae'
  • 'Guibaliceras is a subjective synonym of Gleviceras'
  • 'Gydanoceras is a subjective synonym of Angulaticeras'
  • 'Gyrophioceras was reranked as Vermiceras (Gyrophioceras) and belongs to Vermiceras'
  • 'Gyrophioceras was reranked as Vermiceras (Gyrophioceras) and belongs to Vermiceras' according to Spath 1924
  • 'Hagenowiceras is an objective synonym of Psilophyllites'
  • 'Hammatoceras belongs to Hammatoceratinae'
  • 'Hammatoceratidae belongs to Hildoceratoidea'
  • 'Hammatoceratinae belongs to Hammatoceratidae'
  • 'Hammatoceratoidea is a subjective synonym of Hildoceratoidea'
  • 'Haplopleuroceras belongs to Zurcheriinae'
  • 'Harpocerataceae is a subjective synonym of Hildoceratoidea'
  • 'Harpoceras belongs to Harpoceratinae'
  • 'Harpoceras (Nagaoceras) belongs to Harpoceras' according to Matsumoto 1947
  • 'Nagaoceras is a subjective synonym of Lioceratoides'
  • 'Harpoceratinae belongs to Hildoceratidae'
  • 'Harpoceratoides is a subjective synonym of Harpoceras'
  • 'Harpohildoceras is a subjective synonym of Hildaites'
  • 'Haugia belongs to Phymatoceratidae'
  • 'Haugiella is a nomen dubium'
  • 'Hemimicroceras is a subjective synonym of Bifericeras'
  • 'Hemimicroceratidae is a subjective synonym of Eoderoceratidae'
  • 'Hemiparinodiceras is a subjective synonym of Phricodoceras'
  • 'Hesperites is a subjective synonym of Angulaticeras'
  • 'Hildaites belongs to Hildoceratinae'
  • 'Hildaites (Hildaites) belongs to Hildaites' according to Buckman 1921
  • 'Hildaites (Hildaites) belongs to Hildaites'
  • 'Hildaitoides belongs to Hildoceratinae'
  • 'Hildoceras belongs to Hildoceratinae'
  • 'Hildocerataceae is corrected as Hildoceratoidea and belongs to Ammonitina'
  • 'Hildoceratidae belongs to Hildoceratoidea'
  • 'Hildoceratinae belongs to Hildoceratidae'
  • 'Hildoceratoides is a subjective synonym of Hildaites'
  • 'Homechioceras is a subjective synonym of Orthechioceras'
  • 'Homoxynoticeras is a subjective synonym of Radstockiceras'
  • 'Hongkongites is a subjective synonym of Angulaticeras'
  • 'Hosoureites is a subjective synonym of Graphoceras'
  • 'Hudlestonia belongs to Grammoceratinae'
  • 'Hugia is a subjective synonym of Hyperlioceras'
  • 'Hyalinites is a subjective synonym of Witchellia'
  • 'Hyattia is a subjective synonym of Ludwigia'
  • 'Hyattina is a subjective synonym of Cylicoceras'
  • 'Hyerifalchia belongs to Cymbitidae'
  • 'Hypasteroceras belongs to Hypasteroceratinae'
  • 'Hypasteroceratinae belongs to Arietitidae'
  • 'Hypechioceras is a subjective synonym of Palaeoechioceras'
  • 'Hyperderoceras belongs to Eoderoceratinae'
  • 'Hyperlioceras belongs to Graphoceratinae'
  • 'Hypoxynoticeras belongs to Oxynoticeratidae'
  • 'Indunoceras is a subjective synonym of Reynesocoeloceras'
  • 'Jacobella belongs to Bouleiceratinae'
  • 'Jamesonites belongs to Polymorphitinae'
  • 'Kammerkarites belongs to Schlotheimiidae'
  • 'Kammerkaroceras belongs to Discamphiceratinae'
  • 'Kamptechioceras is a subjective synonym of Paltechioceras'
  • 'Kedoceratinae is a subjective synonym of Dactylioceratinae'
  • 'Kedonoceras is a subjective synonym of Orthodactylites'
  • 'Keynshamites is a subjective synonym of Vermiceras'
  • 'Kialagvikes is a subjective synonym of Erycitoides'
  • 'Kiliania is a subjective synonym of Ludwigia'
  • 'Kleistoxynoticeras is a subjective synonym of Radstockiceras'
  • 'Kohaticeras belongs to Bouleiceratinae'
  • 'Koinodactylites is an objective synonym of Dactylioceras'
  • 'Kolymoceras is a subjective synonym of Harpoceras'
  • 'Kryptodactylites is a subjective synonym of Orthodactylites'
  • 'Laevispirus is a subjective synonym of Arnioceras'
  • 'Lapparentia is replaced by Monestieria'
  • 'Laqueoceras belongs to Psiloceratinae'
  • 'Leioceras belongs to Leioceratinae'
  • 'Leioceratinae belongs to Graphoceratidae'
  • 'Leptaleoceras belongs to Arieticeratinae'
  • 'Leptarpites is a subjective synonym of Eleganticeras'
  • 'Leptechioceras belongs to Echioceratidae'
  • 'Leptechioceras (Leptechioceras) belongs to Leptechioceras' according to Buckman 1923
  • 'Leptechioceras (Leptechioceras) belongs to Leptechioceras'
  • 'Leptodactylites is a subjective synonym of Dactylioceras'
  • 'Leptonotoceras is a subjective synonym of Gemmellaroceras'
  • 'Leukadiella belongs to Leukadiellinae'
  • 'Leukadiellinae belongs to Hildoceratidae'
  • 'Lioceras is a subjective synonym of Harpoceras'
  • 'Lioceratoides belongs to Protogrammoceratinae'
  • 'Pacificeras is a subjective synonym of Tiltoniceras'
  • 'Liparoceras belongs to Liparoceratidae'
  • 'Liparoceras (Liparoceras) belongs to Liparoceras'
  • 'Liparoceratidae belongs to Eoderoceratoidea'
  • 'Lobodactylites is a subjective synonym of Nodicoeloceras'
  • 'Longziceras belongs to Arietitinae'
  • 'Lopadoceras is a subjective synonym of Hyperlioceras'
  • 'Loryella is a subjective synonym of Phymatoceras'
  • 'Lucya is a subjective synonym of Graphoceras'
  • 'Ludwigella is a subjective synonym of Graphoceras'
  • 'Ludwigia belongs to Graphoceratinae'
  • 'Ludwigina is a subjective synonym of Ludwigia'
  • 'Maceratites is a subjective synonym of Witchellia'
  • 'Maconiceras is a subjective synonym of Harpoceras'
  • 'Macrogrammites belongs to Schlotheimiidae'
  • 'Malladaites belongs to Zurcheriinae'
  • 'Manselia is a subjective synonym of Leioceras'
  • 'Martanites was reranked as Hildaites (Martanites) and belongs to Hildaites'
  • 'Coroniceras (Megarietites) is a subjective synonym of Coroniceras (Arietites)'
  • 'Megastomoceras is a subjective synonym of Kammerkarites'
  • 'Melanhippites is a subjective synonym of Arnioceras'
  • 'Meneghinia is a subjective synonym of Arieticeras'
  • 'Mercaticeras belongs to Hildoceratinae'
  • 'Mercaticeratinae is a subjective synonym of Hildoceratinae'
  • 'Meridiceras belongs to Coeloceratidae'
  • 'Merlaites is a subjective synonym of Brodieia'
  • 'Mesodactylioceratinae is a subjective synonym of Dactylioceratinae'
  • 'Mesodactylites is a subjective synonym of Nodicoeloceras'
  • 'Metacymbites is a subjective synonym of Cymbites'
  • 'Metaderoceras belongs to Eoderoceratinae'
  • 'Metarnioceras belongs to Arietitinae'
  • 'Metechioceras is a subjective synonym of Paltechioceras'
  • 'Metophioceras is a subjective synonym of Vermiceras'
  • 'Metoxynoticeras is a subjective synonym of Radstockiceras'
  • 'Microceras is replaced by Bifericeras'
  • 'Microceratidae is a subjective synonym of Eoderoceratidae'
  • 'Microdactylites is a subjective synonym of Dactylioceras'
  • 'Microderoceras belongs to Eoderoceratinae'
  • 'Micropolyplectus is a subjective synonym of Polyplectus'
  • 'Miltoceras belongs to Coeloceratidae'
  • 'Monestieria is a subjective synonym of Pseudogrammoceras'
  • 'Monestierinae is a subjective synonym of Grammoceratinae'
  • 'Mouterdeiceras is a subjective synonym of Furloceras'
  • 'Mucrodactylites is a subjective synonym of Collina'
  • 'Multicoeloceras is a subjective synonym of Nodicoeloceras'
  • 'Murchisonia is an objective synonym of Ludwigia'
  • 'Murihikuites belongs to Psiloceratinae'
  • 'Murleyiceras is a subjective synonym of Hildaites'
  • 'Nadorites is a subjective synonym of Pleydellia'
  • 'Nannina is a subjective synonym of Fontannesia'
  • 'Nannoceras is a subjective synonym of Fontannesia'
  • 'Naxensiceras is a subjective synonym of Canavaria'
  • 'Nejdia belongs to Bouleiceratinae'
  • 'Neoamaciaticeras is an objective synonym of Tauromeniceras'
  • 'Neofuciniceras is a subjective synonym of Fuciniceras'
  • 'Neolioceratoides is a subjective synonym of Lioceratoides'
  • 'Neomicroceras was reranked as Leptechioceras (Neomicroceras) and belongs to Leptechioceras'
  • 'Neoparoniceras is a subjective synonym of Jacobella'
  • 'Neophyllites is a subjective synonym of Psilophyllites'
  • 'Neoprotogrammoceras is a subjective synonym of Protogrammoceras'
  • 'Neotaffertia is a subjective synonym of Hildaites'
  • 'Newmarracarroceras belongs to Witchelliinae'
  • 'Nodicoeloceras belongs to Dactylioceratinae'
  • 'Nodicoeloceratinae is a subjective synonym of Dactylioceratinae'
  • 'Nomodactylites is a subjective synonym of Dactylioceras'
  • 'Nordamaltheus is a subjective synonym of Amaltheus'
  • 'Ochotoceras is a subjective synonym of Eleganticeras'
  • 'Oedania is a subjective synonym of Graphoceras'
  • 'Oistoceras was reranked as Aegoceras (Oistoceras) and belongs to Aegoceras'
  • 'Omoderoceras is a subjective synonym of Villania'
  • 'Omoderoceras latispira is recombined as Villania latispira'
  • 'Omolonoceras is a subjective synonym of Zugodactylites'
  • 'Onychoceras belongs to Hammatoceratinae'
  • 'Ophideroceras is a subjective synonym of Bifericeras'
  • 'Ophioceras is replaced by Echioceras'
  • 'Oregonites is a subjective synonym of Canavaria'
  • 'Orthechioceras belongs to Echioceratidae'
  • 'Orthildaites belongs to Hildoceratinae'
  • 'Orthodactylites was reranked as Dactylioceras (Orthodactylites) and belongs to Dactylioceras'
  • 'Osperlioceras is corrected as Osperleioceras and belongs to Harpoceratinae'
  • 'Ovaticeras belongs to Harpoceratinae'
  • 'Oxydiscoceras is a subjective synonym of Hypasteroceras'
  • 'Oxydiscus is replaced by Oxydiscoceras'
  • 'Oxynoticeras belongs to Oxynoticeratidae'
  • 'Oxynoticeratidae belongs to Psiloceratoidea'
  • 'Oxyparoniceras is a subjective synonym of Jacobella'
  • 'Pachammatoceras is a subjective synonym of Hammatoceras'
  • 'Palaeoechioceras belongs to Echioceratidae'
  • 'Paltarpites is a subjective synonym of Protogrammoceras'
  • 'Paltechioceras belongs to Echioceratidae'
  • 'Paltopleuroceratidae is a subjective synonym of Amaltheidae'
  • 'Paneia is a subjective synonym of Brasilia'
  • 'Papilliceras was reranked as Sonninia (Papilliceras) and belongs to Sonninia'
  • 'Paquieria is a subjective synonym of Brasilia'
  • 'Paracoroniceras was reranked as Coroniceras (Paracoroniceras) and belongs to Coroniceras'
  • 'Paracoronites is a subjective synonym of Euagassiceras'
  • 'Paracymbites belongs to Oxynoticeratidae'
  • 'Paraderoceras is a subjective synonym of Eoderoceras'
  • 'Paradiscamphiceras belongs to Discamphiceratinae'
  • 'Paradumortieria is a subjective synonym of Dumortieria'
  • 'Parahildaites belongs to Hildoceratinae'
  • 'Parahyperderoceras belongs to Eoderoceratinae'
  • 'Paralytoceras is a subjective synonym of Prodactylioceras'
  • 'Paramicroderoceras belongs to Eoderoceratinae'
  • 'Paramicroderoceratinae is a subjective synonym of Eoderoceratinae'
  • 'Parammatoceras is a subjective synonym of Euaptetoceras'
  • 'Paramorphites is a subjective synonym of Polymorphites'
  • 'Paramorphites acutiventris is recombined as Polymorphites acutiventris'
  • 'Paraphylloceras belongs to Psiloceratinae'
  • 'Pararnioceras is a subjective synonym of Coroniceras'
  • 'Parasteroceras belongs to Asteroceratinae'
  • 'Paratropidoceras belongs to Tropidoceratinae'
  • 'Parazurcheria is a subjective synonym of Zurcheria'
  • 'Parechioceras is a subjective synonym of Gagaticeras'
  • 'Parinodiceras belongs to Polymorphitinae'
  • 'Parinodiceratinae is a subjective synonym of Polymorphitinae'
  • 'Paroniceras belongs to Bouleiceratinae'
  • 'Paronychoceras belongs to Phymatoceratidae'
  • 'Paroxynoticeras belongs to Oxynoticeratidae'
  • 'Parvidactylites is a subjective synonym of Dactylioceras'
  • 'Paviaites belongs to Hammatoceratinae'
  • 'Pelecoceras is a subjective synonym of Phymatoceras'
  • 'Pelekodites is a subjective synonym of Witchellia'
  • 'Pelingoceras is a subjective synonym of Gemmellaroceras'
  • 'Pelingoceras pseudocarinatum is recombined as Gemmellaroceras pseudocarinatum'
  • 'Peridactylites is a subjective synonym of Dactylioceras'
  • 'Peronoceras belongs to Dactylioceratinae'
  • 'Petranoceras is a subjective synonym of Hildaites'
  • 'Phaularpites is a subjective synonym of Harpoceras'
  • 'Phenakoceras is a subjective synonym of Dumortieria'
  • 'Phenakocerites is an objective synonym of Dumortieria'
  • 'Phlyseogrammoceras belongs to Grammoceratinae'
  • 'Phricodoceras belongs to Phricodoceratidae'
  • 'Phricodoceratinae was reranked as the family Phricodoceratidae and belongs to Eoderoceratoidea'
  • 'Phylloxynotites is a subjective synonym of Radstockiceras'
  • 'Phymatoceras belongs to Phymatoceratidae'
  • 'Phymatoceratidae belongs to Hildoceratoidea'
  • 'Picenia is a subjective synonym of Phymatoceras'
  • 'Pimelites belongs to Coeloceratidae'
  • 'Pimelitidae is a subjective synonym of Coeloceratidae'
  • 'Planammatoceras belongs to Hammatoceratinae'
  • 'Planicoeloceras is a subjective synonym of Dactylioceras'
  • 'Planifastigites is a subjective synonym of Brasilia'
  • 'Platygraphoceras is a subjective synonym of Graphoceras'
  • 'Platyharpites is a subjective synonym of Lioceratoides'
  • 'Platynoticeras is a subjective synonym of Parinodiceras'
  • 'Platypleuroceras belongs to Polymorphitinae'
  • 'Platystrophites is a subjective synonym of Porpoceras'
  • 'Plesechioceras belongs to Echioceratidae'
  • 'Pleurechioceras is a subjective synonym of Echioceras'
  • 'Pleuroceras belongs to Amaltheidae'
  • 'Pleydellia belongs to Grammoceratinae'
  • 'Podagrosiceras belongs to Podagrosiceratinae'
  • 'Podagrosiceratinae belongs to Hammatoceratidae'
  • 'Podagrosites belongs to Grammoceratinae'
  • 'Polymorphites belongs to Polymorphitinae'
  • 'Polymorphitidae belongs to Eoderoceratoidea'
  • 'Polymorphitinae belongs to Polymorphitidae'
  • 'Polyplectinae is a subjective synonym of Harpoceratinae'
  • 'Polyplectus belongs to Harpoceratinae'
  • 'Pompeckioceras is a subjective synonym of Ptycharietites'
  • 'Porpoceras belongs to Dactylioceratinae'
  • 'Praederoceras is an objective synonym of Xipheroceras'
  • 'Praehaploceras is a subjective synonym of Pseudolioceras'
  • 'Praemercaticeras is a subjective synonym of Hildaites'
  • 'Praepolyplectus is a subjective synonym of Polyplectus'
  • 'Praerycites is a subjective synonym of Phymatoceras'
  • 'Praesphaeroceras belongs to Coeloceratidae'
  • 'Prepapillites is a subjective synonym of Papilliceras'
  • 'Primapsiloceras is a subjective synonym of Psiloceras'
  • 'Primarietites is a subjective synonym of Coroniceras'
  • 'Proamaltheus is a subjective synonym of Amaltheus'
  • 'Proarietites is a subjective synonym of Alsatites'
  • 'Proarietitinae is a subjective synonym of Alsatitinae'
  • 'Proarnioceras is a subjective synonym of Gonioptychoceras'
  • 'Prodactylioceras belongs to Reynesocoeloceratinae'
  • 'Promicroceras belongs to Eoderoceratinae'
  • 'Protechioceras belongs to Asteroceratinae'
  • 'Protechioceras is replaced by Palaeoechioceras'
  • 'Protoarieticeras is a subjective synonym of Arieticeras'
  • 'Protocymbites is a subjective synonym of Vermiceras'
  • 'Protogrammoceras belongs to Protogrammoceratinae'
  • 'Protogrammoceras (Matteiceras) belongs to Protogrammoceras'
  • 'Protogrammoceras (Protogrammoceras) belongs to Protogrammoceras'
  • 'Protogrammoceratinae belongs to Hildoceratidae'
  • 'Pseudaetomoceras belongs to Alsatitinae'
  • 'Pseudagassiceras is a subjective synonym of Euagassiceras'
  • 'Pseudammatoceras is a subjective synonym of Bredyia'
  • 'Pseudaptetoceras belongs to Hammatoceratinae'
  • 'Pseudoarieticeras is a subjective synonym of Arieticeras'
  • 'Coroniceras (Pseudoasteroceras) is a subjective synonym of Coroniceras (Eucoroniceras)'
  • 'Pseudobrodieia is a subjective synonym of Brodieia'
  • 'Pseudogrammoceras belongs to Grammoceratinae'
  • 'Pseudographoceras is a subjective synonym of Ludwigia'
  • 'Pseudolillia belongs to Grammoceratinae'
  • 'Pseudolioceras belongs to Harpoceratinae'
  • 'Pseudolioceras (Pseudolioceras) belongs to Pseudolioceras' according to Buckman 1889
  • 'Pseudolioceras (Pseudolioceras) belongs to Pseudolioceras'
  • 'Pseudomercaticeras belongs to Phymatoceratidae'
  • 'Pseudophricodoceras belongs to Phricodoceratidae'
  • 'Pseudopolyplectus is a subjective synonym of Osperleioceras'
  • 'Pseudoschlotheimia is a subjective synonym of Angulaticeras'
  • 'Pseudoshirbuirnia belongs to Sonniniinae'
  • 'Pseudoskirroceras belongs to Coeloceratidae'
  • 'Pseudotropites belongs to Pseudotropitinae'
  • 'Pseudotropitinae belongs to Arietitidae'
  • 'Pseudowalkericeras is a subjective synonym of Pseudolioceras'
  • 'Psilechioceras is a subjective synonym of Leptechioceras'
  • 'Psiloceras belongs to Psiloceratinae'
  • 'Psilocerataceae is corrected as Psiloceratoidea and belongs to Ammonitina'
  • 'Psiloceratidae belongs to Psiloceratoidea'
  • 'Psiloceratinae belongs to Psiloceratidae'
  • 'Psilonoticeras is an objective synonym of Psiloceras'
  • 'Psilophyllites belongs to Psiloceratinae'
  • 'Ptycharietites belongs to Asteroceratinae'
  • 'Puchenquia belongs to Hammatoceratinae'
  • 'Puchenquia (Gerthiceras) belongs to Puchenquia'
  • 'Puchenquia (Puchenquia) belongs to Puchenquia' according to Westermann and Riccardi 1972
  • 'Puchenquia (Puchenquia) belongs to Puchenquia'
  • 'Radstockiceras belongs to Oxynoticeratidae'
  • 'Rakusites is a subjective synonym of Dactylioceras'
  • 'Rarenodia is a subjective synonym of Phymatoceras'
  • 'Renziceras belongs to Leukadiellinae'
  • 'Retenticeras is a subjective synonym of Radstockiceras'
  • 'Reynesella is a subjective synonym of Hyperlioceras'
  • 'Reynesia is a subjective synonym of Hyperlioceras'
  • 'Reynesoceras belongs to Dactylioceratinae'
  • 'Reynesoceratinae is a subjective synonym of Dactylioceratinae'
  • 'Reynesocoeloceras belongs to Reynesocoeloceratinae'
  • 'Reynesocoeloceratinae belongs to Dactylioceratidae'
  • 'Rhaeboceras is a subjective synonym of Canavarella'
  • 'Rhodaniceras is a subjective synonym of Eudmetoceras'
  • 'Riparioceras is a subjective synonym of Gleviceras'
  • 'Rubrileiites is a subjective synonym of Witchellia'
  • 'Saccaiaceras is a subjective synonym of Coroniceras'
  • 'Saxoceras belongs to Schlotheimiidae'
  • 'Scamnoceras is an objective synonym of Schlotheimia'
  • 'Schloenbachia propinqua is recombined as Tiltoniceras propinquum'
  • 'Schlotheimia belongs to Schlotheimiidae'
  • 'Schlotheimiidae belongs to Psiloceratoidea'
  • 'Schreinbachites belongs to Arietitinae'
  • 'Seccianoceras is a subjective synonym of Cetonoceras'
  • 'Seguentia is a nomen nudum'
  • 'Seguenziceras is a subjective synonym of Arieticeras'
  • 'Seguenziceratinae is replaced by Arieticeratinae'
  • 'Septimaniceras belongs to Dactylioceratinae'
  • 'Shahrudites is a subjective synonym of Spinammatoceras'
  • 'Shakraceras belongs to Grammoceratinae'
  • 'Sherbornites is a subjective synonym of Euhoploceras'
  • 'Shirbuirnia belongs to Sonniniinae'
  • 'Simplidactylites is a subjective synonym of Dactylioceras'
  • 'Slatterites belongs to Oxynoticeratidae'
  • 'Sonninia belongs to Sonniniinae'
  • 'Sonninia (Alaskinia) belongs to Sonninia' according to Westermann 1978
  • 'Sonninia (Alaskinia) belongs to Sonninia'
  • 'Sonninia (Alaskoceras) is replaced by Sonninia (Alaskinia)'
  • 'Sonninia (Sonninia) belongs to Sonninia'
  • 'Sonniniidae belongs to Hildoceratoidea'
  • 'Sonniniinae belongs to Sonniniidae'
  • 'Sonninites belongs to Sonniniinae'
  • 'Spatulites is a subjective synonym of Witchellia'
  • 'Sphaerocoeloceras belongs to Podagrosiceratinae'
  • 'Sphenarpites belongs to Harpoceratinae'
  • 'Spinammatoceras belongs to Zurcheriinae'
  • 'Spiniclaviceras is a subjective synonym of Metaderoceras'
  • 'Spiniclaviceras spirale is recombined as Metaderoceras spirale'
  • 'Spinicoeloceras is a subjective synonym of Nodicoeloceras'
  • 'Staufenia belongs to Leioceratinae'
  • 'Stenechioceras is a subjective synonym of Paltechioceras'
  • 'Stiphromorphites is a subjective synonym of Euhoploceras'
  • 'Stokeia is a subjective synonym of Graphoceras'
  • 'Storthoceras is a subjective synonym of Macrogrammites'
  • 'Strophogyria is a subjective synonym of Ludwigia'
  • 'Sulciferites is a subjective synonym of Angulaticeras'
  • 'Sunrisites is a subjective synonym of Franziceras'
  • 'Sunrisites sunrisense belongs to Sunrisites' according to Guex 1980
  • 'Sunrisites sunrisense is recombined as Franziceras sunrisense'
  • 'Sunrisitinae is a subjective synonym of Psiloceratinae'
  • 'Taffertia belongs to Harpoceratinae'
  • 'Tardarpoceras is a subjective synonym of Harpoceras'
  • 'Tauromeniceras belongs to Arieticeratinae'
  • 'Tayloricites is a subjective synonym of Alsatites'
  • 'Telodactylites is a subjective synonym of Porpoceras'
  • 'Teneroceras is an objective synonym of Waehneroceras'
  • 'Tenuidactylites is a subjective synonym of Orthodactylites'
  • 'Tetraspidoceras belongs to Coeloceratidae'
  • 'Tiltoniceras belongs to Harpoceratinae'
  • 'Tipperoceras belongs to Alsatitinae'
  • 'Tmaegoceras belongs to Arietitinae'
  • 'Tmaegophioceras belongs to Asteroceratinae'
  • 'Tmetoceras belongs to Tmetoceratinae'
  • 'Tmetoceratinae belongs to Hildoceratidae'
  • 'Tmetoites is a subjective synonym of Tmetoceras'
  • 'Toxodactylites is a subjective synonym of Dactylioceras'
  • 'Toxolioceras is a subjective synonym of Hyperlioceras'
  • 'Transicoeloceras is a subjective synonym of Catacoeloceras'
  • 'Transipsiloceras is a subjective synonym of Psiloceras'
  • 'Trinacrioceras is a nomen nudum'
  • 'Troitsaia belongs to Grammoceratinae'
  • 'Tropidoceras belongs to Tropidoceratinae'
  • 'Tropidoceratidae was reranked as the subfamily Tropidoceratinae and belongs to Polymorphitidae'
  • 'Tubellites is a subjective synonym of Gemmellaroceras'
  • 'Tugurites was reranked as Pseudolioceras (Tugurites) and belongs to Pseudolioceras'
  • 'Tunisiceras is a subjective synonym of Paratropidoceras'
  • 'Tutchericeras is a subjective synonym of Gleviceras'
  • 'Ugdulenia is a subjective synonym of Emaciaticeras'
  • 'Uptonia belongs to Polymorphitinae'
  • 'Urkutites is a subjective synonym of Hildoceras'
  • 'Vacekia is a subjective synonym of Brasilia'
  • 'Vermiceras belongs to Arietitinae'
  • 'Vermiceras (Paracaloceras) belongs to Vermiceras' according to Spath 1923
  • 'Vermiceras (Paracaloceras) belongs to Vermiceras'
  • 'Vermiceras (Vermiceras) belongs to Vermiceras' according to Hyatt 1889
  • 'Vermiceras (Vermiceras) belongs to Vermiceras'
  • 'Vermidactylites is a subjective synonym of Dactylioceras'
  • 'Vicininodiceras belongs to Liparoceratidae'
  • 'Victoriceras is a subjective synonym of Gleviceras'
  • 'Villania belongs to Phricodoceratidae'
  • 'Villaniinae is a subjective synonym of Phricodoceratinae'
  • 'Vobstericeras is a subjective synonym of Paltechioceras'
  • 'Waehneroceras belongs to Schlotheimiidae'
  • 'Waehneroceratinae is a subjective synonym of Schlotheimiidae'
  • 'Walkeria is replaced by Walkericeras'
  • 'Walkericeras is a subjective synonym of Pleydellia'
  • 'Welschia is a subjective synonym of Ludwigia'
  • 'Westermanniceras belongs to Podagrosiceratinae'
  • 'Whitbyiceras is a subjective synonym of Brodieia'
  • 'Wiltshireia is a subjective synonym of Brasilia'
  • 'Witchellia belongs to Witchelliinae'
  • 'Witchelliinae belongs to Sonniniidae'
  • 'Wrightia is replaced by Protogrammoceras'
  • 'Xeinodactylites is a subjective synonym of Dactylioceras'
  • 'Xipheroceras belongs to Eoderoceratinae'
  • 'Xipheroceratidae is a subjective synonym of Eoderoceratidae'
  • 'Yakounia belongs to Grammoceratinae'
  • 'Zamaiceras belongs to Coeloceratidae'
  • 'Zugella is a subjective synonym of Witchellia'
  • 'Zugodactylites belongs to Dactylioceratinae'
  • 'Zugophorites is a subjective synonym of Witchellia'
  • 'Zurcheria belongs to Zurcheriinae'
  • 'Zurcheriinae belongs to Hammatoceratidae'