PBDB

Opinions from C. Teichert et al. 1964

'Acanthonautilus belongs to Solenochilidae'
'Acleistoceras belongs to Acleistoceratidae'
'Acleistoceratidae belongs to Oncoceratida'
'Actinoceras belongs to Actinoceratidae'
'Actinoceras (Paractinoceras) was reranked as Paractinoceras and belongs to Actinoceratidae'
'Actinoceratidae belongs to Actinocerida'
'Actinoceratoidea belongs to Cephalopoda'
'Actinocerida belongs to Actinoceratoidea'
'Actinomorpha belongs to Valcouroceratidae'
'Adelphoceras belongs to Rutoceratidae'
'Adnatoceras belongs to Spyroceratinae'
'Aethoceras belongs to Estonioceratidae'
'Aipoceras belongs to Aipoceratidae'
'Aipocerataceae belongs to Nautilida'
'Aipoceratidae belongs to Aipocerataceae'
'Akidocheilus belongs to Cephalopoda'
'Akidocheilus (Akidocheilus) belongs to Akidocheilus'
'Akidocheilus (Akidocheilus) belongs to Akidocheilus' according to Till 1907
'Akidocheilus (Planecapula) belongs to Akidocheilus' according to Shimanskiy 1947
'Akidocheilus (Planecapula) belongs to Akidocheilus'
'Aktastioceras belongs to Parabactritidae'
'Alaskoceras belongs to Estonioceratidae'
'Albertoceras belongs to Ellesmeroceratidae'
'Aletoceras belongs to Brevicoceratidae'
'Alexandronautilus belongs to Liroceratidae'
'Allanoceras belongs to Spyroceratinae'
'Allocotoceras belongs to Endoceratidae'
'Allopiloceras belongs to Piloceratidae'
'Allotrioceras belongs to Allotrioceratidae'
'Allotrioceratidae belongs to Endocerida'
'Allumettoceras belongs to Tripteroceratidae'
'Alpenoceras belongs to Discosoridae'
'Aluveroceras is a subjective synonym of Ormoceras'
'Amphicyrtoceras belongs to Acleistoceratidae'
'Anastomoceras belongs to Spyroceratinae'
'Angelinoceras belongs to Lituitidae'
'Anglicornus belongs to Brevicoceratidae'
'Anguloceras belongs to Bassleroceratidae'
'Anomaloceras belongs to Rutoceratidae'
'Anomeioceras belongs to Acleistoceratidae'
'Anoploceras belongs to Tainoceratidae'
'Anthoceras belongs to Proterocameroceratidae'
'Antiphragmoceras belongs to Westonoceratidae'
'Antiplectoceras belongs to Barrandoceratidae'
'Antonoceras belongs to Oncoceratida'
'Aphelaeceras belongs to Trigonoceratidae'
'Aphetoceras belongs to Estonioceratidae'
'Aphragmites belongs to Ascoceratinae'
'Apioceras belongs to Oncoceratida'
'Aploceras belongs to Carbactinoceratidae'
'Apocrinoceras belongs to Protocycloceratidae'
'Apogonoceras belongs to Trigonoceratidae'
'Apsidoceras belongs to Apsidoceratidae'
'Apsidoceratidae belongs to Barrandeocerida'
'Archiacoceras belongs to Archiacoceratidae'
'Archiacoceratidae belongs to Oncoceratida'
'Argocheilus belongs to Poterioceratidae'
'Arkoceras belongs to Trocholitidae'
'Arkonoceras belongs to Michelinoceratinae'
'Armenoceras belongs to Armenoceratidae'
'Arpaoceras belongs to Cayutoceratinae'
'Arthrophyllum belongs to Lamellorthoceratidae'
'Asaphiceras belongs to Oncoceratidae'
'Ascoceras belongs to Ascoceratinae'
'Ascoceratidae belongs to Ascocerida'
'Ascoceratinae belongs to Ascoceratidae'
'Ascocerida belongs to Nautiloidea'
'Asymptoceras belongs to Aipoceratidae'
'Aturia belongs to Aturiidae'
'Aturiidae belongs to Nautilitaceae'
'Aturoidea belongs to Hercoglossidae'
'Augustoceras belongs to Valcouroceratidae'
'Aulaconautilus belongs to Paracenoceratidae'
'Aulametacoceras belongs to Tainoceratidae'
'Austinoceras belongs to Acleistoceratidae'
'Avilionella belongs to Barrandoceratidae'
'Avoceras belongs to Bassleroceratidae'
'Bactrites belongs to Bactritida'
'Bactritida belongs to Bactritoidea'
'Bactritidae belongs to Bactritida'
'Bactritoidea belongs to Cephalopoda'
'Bactroceras belongs to Baltoceratidae'
'Baeopleuroceras belongs to Nephriticeratidae'
'Bajkaloceras belongs to Bajkaloceratidae'
'Bajkaloceratidae belongs to Intejocerida'
'Balticoceras belongs to Michelinoceratinae'
'Baltoceratidae belongs to Ellesmerocerida'
'Barrandeoceras belongs to Barrandoceratidae'
'Barrandeoceratida is corrected as Barrandeocerida and belongs to Nautiloidea'
'Barrandoceratidae belongs to Barrandeocerida'
'Bassleroceras belongs to Bassleroceratidae'
'Bathmoceras belongs to Bathmoceratidae'
'Bathmoceratidae belongs to Cyrtocerinina'
'Beekmanoceras belongs to Trocholitidae'
'Belemnitomimus belongs to Parabactritidae'
'Beloitoceras belongs to Oncoceratidae'
'Bergoceras belongs to Pseudactinoceratinae'
'Bickmorites belongs to Barrandoceratidae'
'Bifoveoceras belongs to Orthoceratinae'
'Billingsites belongs to Ascoceratinae'
'Bistrialites belongs to Liroceratidae'
'Bitaunioceras belongs to Michelinoceratinae'
'Blakeoceras belongs to Nothoceratidae'
'Blastocerina belongs to Brevicoceratidae'
'Bohemites belongs to Leurocycloceratinae'
'Bolloceras belongs to Nothoceratidae'
'Boreoceras belongs to Cyrtendoceratidae'
'Brachycycloceras belongs to Brachycycloceratidae'
'Brachycycloceratidae belongs to Orthocerataceae'
'Bradfordoceras belongs to Cayutoceratinae'
'Brevicoceras belongs to Brevicoceratidae'
'Brevicoceratidae belongs to Oncocerida'
'Bridgeoceras belongs to Ellesmeroceratidae'
'Broeggeroceras belongs to Westonoceratidae'
'Buehleroceras belongs to Ellesmeroceratidae'
'Burenoceras belongs to Ellesmeroceratidae'
'Buttsoceras belongs to Troedssonellidae'
'Byronoceras belongs to Acleistoceratidae'
'Calchasiceras is a subjective synonym of Poterioceras'
'Calhounoceras belongs to Actinocerida'
'Callaionautilus belongs to Clydonautilidae'
'Calocyrtoceras belongs to Paraphragmitidae'
'Cameroceras belongs to Endoceratidae'
'Campbelloceras belongs to Tarphyceratidae'
'Campendoceras belongs to Proterocameroceratidae'
'Campyloceras belongs to Pseudactinoceratinae'
'Carbactinoceras belongs to Carbactinoceratidae'
'Carbactinoceratidae belongs to Actinocerida'
'Carinonautilus belongs to Nautilidae'
'Carlloceras belongs to Centroceratidae'
'Caseoceras belongs to Ellesmeroceratidae'
'Cassinoceras belongs to Piloceratidae'
'Casteroceras belongs to Rutoceratidae'
'Catoraphinoceras belongs to Protocycloceratidae'
'Catyrephoceras belongs to Lechritrochoceratidae'
'Cayugoceras belongs to Mandaloceratidae'
'Cayutoceras belongs to Cayutoceratinae'
'Cayutoceratinae belongs to Pseudorthoceratidae'
'Cedarvilleoceras is a subjective synonym of Dawsonoceras'
'Cenoceras belongs to Nautilidae'
'Centroceras belongs to Centroceratidae'
'Centroceratidae belongs to Trigonocerataceae'
'Centrocyrtoceras belongs to Barrandoceratidae'
'Centrolitoceras belongs to Rutoceratidae'
'Centroonoceras belongs to Sactorthoceratidae'
'Centrorizoceras belongs to Oncoceratidae'
'Centrotarphyceras belongs to Tarphyceratidae'
'Chadwickoceras belongs to Acleistoceratidae'
'Changkiuoceras belongs to Endoceratoidea'
'Charactoceras belongs to Apsidoceratidae'
'Charactocerina belongs to Apsidoceratidae'
'Chazyoceras belongs to Endoceratidae'
'Chepuloceras belongs to Ellesmeroceratidae'
'Chicagooceras belongs to Orthocerida'
'Chidleyenoceras belongs to Apsidoceratidae'
'Chihlioceras belongs to Chihlioceratidae'
'Chihlioceratidae belongs to Endocerida'
'Chisiloceras is a subjective synonym of Proterovaginoceras'
'Choanoceras belongs to Choanoceratidae'
'Chouteauoceras belongs to Trigonoceratidae'
'Cimomia belongs to Hercoglossidae'
'Cinctoceras belongs to Mandaloceratidae'
'Clarkesvillia belongs to Westonoceratidae'
'Clarkoceras belongs to Ellesmeroceratidae'
'Clathroceras belongs to Trimeroceratidae'
'Clelandoceras belongs to Ellesmeroceratidae'
'Cliftonoceras belongs to Uranoceratidae'
'Clinoceras belongs to Clinoceratidae'
'Clionyssiceras belongs to Acleistoceratidae'
'Clitendoceras belongs to Proterocameroceratidae'
'Clydonautilaceae belongs to Nautilida'
'Clydonautilidae belongs to Clydonautilaceae'
'Clydonautilus belongs to Clydonautilidae'
'Clymenonautilus belongs to Syringonautilidae'
'Clytoceras belongs to Estonioceratidae'
'Cochleiferoceras belongs to Bactritida'
'Cochlioceras belongs to Baltoceratidae'
'Codoceras belongs to Polyelasmoceratidae'
'Coelocyrtoceras belongs to Polyelasmoceratidae'
'Coelogasteroceras belongs to Liroceratidae'
'Colpoceras belongs to Endoceratoidea'
'Columenoceras belongs to Geisonoceratidae'
'Conchorhynchus belongs to Cephalopoda'
'Condraoceras belongs to Liroceratidae'
'Conoceras belongs to Endoceratoidea'
'Conocerina belongs to Ellesmeroceratidae'
'Conostichoceras belongs to Nothoceratidae'
'Conradoceras belongs to Hemiphragmoceratidae'
'Cooperoceras belongs to Tainoceratidae'
'Coralloceras is a subjective synonym of Lamellorthoceras'
'Coreanoceras belongs to Manchuroceratidae'
'Cosmonautilus belongs to Clydonautilidae'
'Cotteroceras belongs to Proterocameroceratidae'
'Cranoceras is a subjective synonym of Cyrthoceratites'
'Crateroceras belongs to Acleistoceratidae'
'Cryptorthoceras belongs to Spyroceratinae'
'Ctenobactrites belongs to Bactritidae'
'Ctenobactrites (Ctenobactrites) belongs to Ctenobactrites' according to Shimanskiy 1951
'Ctenobactrites (Ctenobactrites) belongs to Ctenobactrites'
'Ctenobactrites (Mirites) belongs to Ctenobactrites' according to Shimanskiy 1962
'Ctenobactrites (Mirites) belongs to Ctenobactrites'
'Ctenoceras belongs to Orthoceratinae'
'Cumberloceras belongs to Ellesmeroceratidae'
'Cumingsoceras belongs to Uranoceratidae'
'Curtoceras belongs to Trocholitidae'
'Cyclobactrites belongs to Bactritida'
'Cycloceras belongs to Orthocerida'
'Cyclocyrtendoceras belongs to Cyrtendoceratidae'
'Cyclolituites belongs to Lituitidae'
'Cyclopites belongs to Polyelasmoceratidae'
'Cycloplectoceras belongs to Tarphyceratidae'
'Cyclostomiceras belongs to Ellesmeroceratidae'
'Cymatoceratidae belongs to Nautilitaceae'
'Cymatonautilus belongs to Cymatoceratidae'
'Cyptendoceras belongs to Proterocameroceratidae'
'Cyptendocerina is a subjective synonym of Cyptendoceras'
'Cyrtactinoceras belongs to Proteoceratidae'
'Cyrtendoceras belongs to Cyrtendoceratidae'
'Cyrtendoceratidae belongs to Endocerida'
'Cyrthoceratites belongs to Nothoceratidae'
'Cyrtobactrites belongs to Bactritidae'
'Meloceras is a subjective synonym of Maelonoceras'
'Cyrtoceratites belongs to Archiacoceratidae'
'Cyrtocerina belongs to Cyrtocerinidae'
'Cyrtocerinidae belongs to Ellesmerocerida'
'Cyrtocheilus belongs to Polyelasmoceratidae'
'Cyrtocycloceras belongs to Paraphragmitidae'
'Cyrtogomphoceras belongs to Cyrtogomphoceratidae'
'Cyrtogomphus belongs to Poterioceratidae'
'Cyrtonybyoceras belongs to Armenoceratidae'
'Cyrtorizoceras belongs to Oncoceratidae'
'Cyrtorhizoceras is a misspelling of Cyrtorizoceras'
'Cyrtospyroceras belongs to Spyroceratinae'
'Cyrtothoracoceras belongs to Spyroceratinae'
'Cyrtovaginoceras belongs to Cyrtendoceratidae'
'Dakeoceras belongs to Ellesmeroceratidae'
'Danaoceras belongs to Polyelasmoceratidae'
'Danoceras belongs to Diestoceratidae'
'Dartoceras belongs to Cephalopoda'
'Dawsonoceras belongs to Dawsonoceratidae'
'Dawsonoceratidae belongs to Orthocerida'
'Dawsonocerina belongs to Dawsonoceratidae'
'Deckeroceras belongs to Apsidoceratidae'
'Deiroceras belongs to Ormoceratidae'
'Deltocymatoceras belongs to Cymatoceratidae'
'Deltoidonautilus belongs to Hercoglossidae'
'Dentoceras belongs to Scyphoceratidae'
'Desioceras belongs to Ellesmeroceratidae'
'Devonobactrites belongs to Bactritida'
'Devonocheilus belongs to Archiacoceratidae'
'Diademoceras belongs to Rutoceratidae'
'Diagoceras belongs to Spyroceratinae'
'Diastoloceras belongs to Protocycloceratidae'
'Dictyoceras belongs to Orthocerida'
'Diestoceras belongs to Diestoceratidae'
'Diestoceratidae belongs to Oncoceratida'
'Digenuoceras belongs to Oncoceratidae'
'Diodoceras belongs to Trigonoceratidae'
'Diorugoceras belongs to Centroceratidae'
'Diploceras belongs to Endoceratoidea'
'Discitoceras belongs to Trigonoceratidae'
'Discoactinoceras belongs to Huroniidae'
'Discoceras belongs to Trocholitidae'
'Discosorida belongs to Nautiloidea'
'Discosoridae belongs to Discosorida'
'Discosorus belongs to Discosoridae'
'Dnestroceras belongs to Cayutoceratinae'
'Dolorthoceras belongs to Spyroceratinae'
'Domatoceras belongs to Grypoceratidae'
'Donacoceras belongs to Orthocerida'
'Dowlingoceras belongs to Diestoceratidae'
'Duerleyoceras belongs to Rutoceratidae'
'Dunleithoceras belongs to Oncoceratidae'
'Dwightoceras belongs to Bassleroceratidae'
'Dyscritoceras belongs to Bassleroceratidae'
'Ecdyceras belongs to Hebetoceratidae'
'Ectocycloceras belongs to Protocycloceratidae'
'Ectocyrtoceras belongs to Acleistoceratidae'
'Edaphoceras belongs to Koninckioceratidae'
'Ehlersoceras belongs to Oncoceratidae'
'Eichwaldoceras belongs to Estonioceratidae'
'Eifeloceras belongs to Pseudorthoceratinae'
'Ekwanoceras belongs to Oncoceratidae'
'Eleusoceras belongs to Brevicoceratidae'
'Ellesmeroceras belongs to Ellesmeroceratidae'
'Ellesmeroceratida is corrected as Ellesmerocerida and belongs to Nautiloidea'
'Ellesmeroceratidae belongs to Ellesmerocerida'
'Ellinoceras belongs to Actinoceratidae'
'Elrodoceras belongs to Armenoceratidae'
'Encoiloceras belongs to Tainoceratidae'
'Endoceras belongs to Endoceratidae'
'Endoceratidae belongs to Endocerida'
'Endoceratoidea belongs to Cephalopoda'
'Endocerida belongs to Endoceratoidea'
'Endocycloceras belongs to Protocycloceratidae'
'Endodiscosorus belongs to Lowoceratidae'
'Endolobus belongs to Koninckioceratidae'
'Endoplanoceras belongs to Nephriticeratidae'
'Endoplectoceras belongs to Phragmoceratidae'
'Endostokesoceras is a subjective synonym of Alpenoceras'
'Enoploceras belongs to Tainoceratidae'
'Eobactrites belongs to Bactritidae'
'Eorizoceras belongs to Graciloceratidae'
'Eothinoceras belongs to Bathmoceratidae'
'Eotrimeroceras belongs to Trimeroceratidae'
'Eotripteroceras belongs to Michelinoceratinae'
'Ephippioceras belongs to Ephippioceratidae'
'Ephippioceratidae belongs to Clydonautilaceae'
'Ephippiorthoceras belongs to Proteoceratidae'
'Epicymatoceras belongs to Cymatoceratidae'
'Epidomatoceras belongs to Grypoceratidae'
'Epistroboceras belongs to Trigonoceratidae'
'Eremoceras belongs to Ellesmeroceratidae'
'Eridites belongs to Spyroceratinae'
'Erlangericheilus belongs to Cephalopoda'
'Escharendoceras belongs to Proterocameroceratidae'
'Eskimoceras belongs to Ormoceratidae'
'Estonioceras belongs to Estonioceratidae'
'Eucymatoceras belongs to Cymatoceratidae'
'Eudoceras belongs to Oncoceratida'
'Euloxoceras belongs to Spyroceratinae'
'Euryrizoceras belongs to Acleistoceratidae'
'Eurystomites belongs to Tarphyceratidae'
'Eushantungoceras is a subjective synonym of Armenoceras'
'Eusthenoceras belongs to Pseudactinoceratinae'
'Eutrephoceras belongs to Nautilidae'
'Evencoceras belongs to Intejoceratidae'
'Evlanoceras belongs to Polyelasmoceratidae'
'Exocyrtoceras belongs to Brevicoceratidae'
'Faberoceras belongs to Westonoceratidae'
'Fayettoceras belongs to Valcouroceratidae'
'Floweroceras belongs to Actinoceratidae'
'Foerstellites belongs to Endoceratidae'
'Foersteoceras belongs to Brevicoceratidae'
'Foordiceras belongs to Koninckioceratidae'
'Franklinoceras belongs to Ruedemannoceratidae'
'Fremontoceras belongs to Apsidoceratidae'
'Fusicoceras belongs to Spyroceratinae'
'Galtoceras belongs to Acleistoceratidae'
'Garryoceras belongs to Orthocerida'
'Gasconsoceras belongs to Barrandoceratidae'
'Gaspocyrtoceras belongs to Paraphragmitidae'
'Geisonoceras belongs to Geisonoceratidae'
'Geisonoceratidae belongs to Orthocerataceae'
'Geisonoceroides belongs to Spyroceratinae'
'Germanonautilus belongs to Tainoceratidae'
'Glenisteroceras belongs to Troedssonellidae'
'Glossoceras belongs to Ascoceratinae'
'Glyptodendron belongs to Westonoceratidae'
'Goldringia belongs to Rutoceratidae'
'Gomphoceras belongs to Oncoceratida'
'Gonatocheilus belongs to Cephalopoda'
'Gonatocyrtoceras belongs to Acleistoceratidae'
'Gonioceras belongs to Gonioceratidae'
'Gonioceratidae belongs to Actinocerida'
'Gonionaedyceras belongs to Brevicoceratidae'
'Gonionautilidae belongs to Clydonautilaceae'
'Gonionautilus belongs to Gonionautilidae'
'Gorbyoceras belongs to Proteoceratidae'
'Gordonoceras belongs to Spyroceratinae'
'Gorgonoceras belongs to Lamellorthoceratidae'
'Graciloceras belongs to Graciloceratidae'
'Graftonoceras belongs to Trocholitidae'
'Greenlandoceras belongs to Greenlandoceratidae'
'Grimsbyoceras belongs to Acleistoceratidae'
'Grypoceras belongs to Grypoceratidae'
'Grypoceras (Plummeroceras) was reranked as Plummeroceras and belongs to Grypoceratidae'
'Grypoceras (Plummeroceras) plummeri is recombined as Plummeroceras plummeri'
'Grypoceratidae belongs to Trigonocerataceae'
'Gryponautilus belongs to Grypoceratidae'
'Gyroceras is an invalid subgroup of Nautiloidea'
'Gyroceras is a subjective synonym of Naedyceras'
'Gyroceras elrodi is recombined as Cumingsoceras elrodi'
'Gyroceratidae is a subjective synonym of Tainoceratidae'
'Gyronaedyceras belongs to Brevicoceratidae'
'Gzheloceras belongs to Tainoceratidae'
'Gzheloceratidae is a subjective synonym of Tainoceratidae'
'Hadrocheilus belongs to Cephalopoda'
'Hadrocheilus (Arcuatobeccus) belongs to Hadrocheilus' according to Shimanskiy 1947
'Hadrocheilus (Arcuatobeccus) belongs to Hadrocheilus'
'Hadrocheilus (Convexiterbeccus) belongs to Hadrocheilus'
'Hadrocheilus (Convexiterbeccus) belongs to Hadrocheilus' according to Shimanskiy 1947
'Hadrocheilus (Dentatobeccus) belongs to Hadrocheilus'
'Hadrocheilus (Dentatobeccus) belongs to Hadrocheilus' according to Shimanskiy 1947
'Hadrocheilus (Globosobeccus) belongs to Hadrocheilus'
'Hadrocheilus (Globosobeccus) belongs to Hadrocheilus' according to Shimanskiy 1947
'Hadrocheilus (Hadrocheilus) belongs to Hadrocheilus'
'Hadrocheilus (Hadrocheilus) belongs to Hadrocheilus' according to Till 1907
'Halloceras belongs to Rutoceratidae'
'Hardmanoceras belongs to Trocholitidae'
'Harrisoceras belongs to Geisonoceratidae'
'Haydenoceras belongs to Barrandoceratidae'
'Hebetoceras belongs to Hebetoceratidae'
'Hedstroemoceras belongs to Cephalopoda'
'Helenites is a subjective synonym of Armenoceras'
'Heloceras belongs to Orthocerida'
'Hemiceratites belongs to Endoceratoidea'
'Hemichoanella belongs to Ellesmeroceratidae'
'Hemiliroceras belongs to Liroceratidae'
'Heminautilus belongs to Cymatoceratidae'
'Hemiphragmoceras belongs to Hemiphragmoceratidae'
'Hemiphragmoceratidae belongs to Oncoceratida'
'Hemipiloceras belongs to Endoceratoidea'
'Heracloceras belongs to Nephriticeratidae'
'Hercoceras belongs to Rutoceratidae'
'Hercocyrtoceras belongs to Acleistoceratidae'
'Hercoglossa belongs to Hercoglossidae'
'Hercoglossidae belongs to Nautilitaceae'
'Hercoglossoceras is a subjective synonym of Pseudaganides'
'Herkimeroceras belongs to Jovellaniidae'
'Hesperoceras belongs to Michelinoceratinae'
'Heteroceratidae belongs to Ancylocerataceae'
'Hexagonites belongs to Tainoceratidae'
'Hexameroceras belongs to Hemiphragmoceratidae'
'Hindeoceras belongs to Rutoceratidae'
'Hipparionoceras belongs to Polyelasmoceratidae'
'Holconautilus belongs to Tainoceratidae'
'Holmiceras belongs to Lituitidae'
'Homaloceras belongs to Centroceratidae'
'Homoadelphoceras belongs to Rutoceratidae'
'Hopeioceras belongs to Actinocerida'
'Humeoceras belongs to Humeoceratidae'
'Humeoceratidae belongs to Endocerida'
'Hunanoceras belongs to Tainoceratidae'
'Huronia belongs to Huroniidae'
'Huroniella belongs to Huroniidae'
'Huroniidae belongs to Actinocerida'
'Indonautilus belongs to Liroceratidae'
'Intejoceras belongs to Intejoceratidae'
'Intejoceratidae belongs to Intejocerida'
'Intejocerida belongs to Endoceratoidea'
'Inversoceras belongs to Trimeroceratidae'
'Isorthoceras belongs to Proteoceratidae'
'Jasperoceras belongs to Trocholitidae'
'Joachimoceras belongs to Geisonoceratidae'
'Jolietoceras belongs to Uranoceratidae'
'Jonesoceras belongs to Geisonoceratidae'
'Jovellania belongs to Jovellaniidae'
'Jovellaniidae belongs to Oncoceratida'
'Juvavionautilus belongs to Syringonautilidae'
'Kailuanoceras belongs to Endoceratoidea'
'Kaipingoceras belongs to Endoceratoidea'
'Karoceras belongs to Karoceratidae'
'Karoceratidae belongs to Oncoceratida'
'Kawasakiceras belongs to Endoceratidae'
'Kayoceras belongs to Lowoceratidae'
'Kentlandoceras belongs to Oncoceratidae'
'Kiaeroceras belongs to Cyrtogomphoceratidae'
'Kindleoceras belongs to Valcouroceratidae'
'Kionoceras belongs to Kionoceratinae'
'Kirkoceras belongs to Proterocameroceratidae'
'Knightoceras belongs to Koninckioceratidae'
'Kochoceras belongs to Actinoceratidae'
'Kokenia belongs to Bactritidae'
'Konglungenoceras belongs to Cyrtogomphoceratidae'
'Koninckioceratidae belongs to Tainocerataceae'
'Kotoceras belongs to Endoceratidae'
'Kutorgoceras belongs to Endoceratidae'
'Kyminoceras belongs to Protocycloceratidae'
'Lambeoceras belongs to Gonioceratidae'
'Lamellorthoceras belongs to Lamellorthoceratidae'
'Lamottoceras belongs to Endoceratidae'
'Landeroceras belongs to Cyrtogomphoceratidae'
'Laumontoceras belongs to Jovellaniidae'
'Laureloceras belongs to Barrandoceratidae'
'Lavaloceras belongs to Westonoceratidae'
'Lebetoceras belongs to Ellesmeroceratidae'
'Lechritrochoceras belongs to Lechritrochoceratidae'
'Lechritrochoceratidae belongs to Barrandeocerida'
'Leptocheilus belongs to Cephalopoda'
'Leptocheilus (Leptocheilus) belongs to Leptocheilus'
'Leptocheilus (Leptocheilus) belongs to Leptocheilus' according to Till 1907
'Leptocheilus (Mesocheilus) belongs to Leptocheilus' according to Till 1909
'Leptocheilus (Mesocheilus) belongs to Leptocheilus'
'Leuroceras belongs to Trigonoceratidae'
'Leurocycloceratinae belongs to Orthoceratidae'
'Leurorthoceras belongs to Actinoceratidae'
'Leurotrochoceras belongs to Lechritrochoceratidae'
'Levisoceras belongs to Ellesmeroceratidae'
'Librovitschiceras belongs to Aipoceratidae'
'Linchengoceras belongs to Endoceratoidea'
'Liroceras belongs to Liroceratidae'
'Liroceratidae belongs to Clydonautilaceae'
'Liskeardia belongs to Endoceratidae'
'Lispoceras belongs to Trigonoceratidae'
'Litoceras belongs to Trocholitidae'
'Litogyroceras belongs to Rutoceratidae'
'Lituites belongs to Lituitidae'
'Lituitidae belongs to Tarphycerida'
'Lobendoceras belongs to Proterocameroceratidae'
'Lobobactrites belongs to Bactritidae'
'Lobosiphon belongs to Proterocameroceratidae'
'Loganoceras belongs to Oncoceratidae'
'Lophoceras belongs to Koninckioceratidae'
'Lopingoceras belongs to Spyroceratinae'
'Lorieroceras belongs to Nothoceratidae'
'Lowoceras belongs to Lowoceratidae'
'Lowoceratidae belongs to Discosorida'
'Loxoceras belongs to Orthocerida'
'Loxochoanella belongs to Ellesmeroceratidae'
'Lyckholmoceras belongs to Diestoceratidae'
'Lyecoceras belongs to Paraphragmitidae'
'Lyrioceras belongs to Nephriticeratidae'
'Lysagoroceras belongs to Poterioceratidae'
'Lysagoroceras angustum belongs to Lysagoroceras'
'Maccoyoceras belongs to Trigonoceratidae'
'Macrodomoceras belongs to Polyelasmoceratidae'
'Macroloxoceras belongs to Pseudactinoceratinae'
'Maelonoceras belongs to Oncoceratidae'
'Manchuroceras belongs to Manchuroceratidae'
'Manchuroceratidae belongs to Endocerida'
'Mandaloceras belongs to Mandaloceratidae'
'Mandaloceratidae belongs to Discosorida'
'Manitoulinoceras belongs to Valcouroceratidae'
'Manitouoceras belongs to Proterocameroceratidae'
'Mariceras belongs to Scyphoceratidae'
'Mcqueenoceras belongs to Proterocameroceratidae'
'Mecynoceras belongs to Poterioceratidae'
'Megadiscosorus belongs to Armenoceratidae'
'Megaglossoceras belongs to Ephippioceratidae'
'Meniscoceras belongs to Proterocameroceratidae'
'Menuthionautilus belongs to Grypoceratidae'
'Mesnaquaceras belongs to Geisonoceratidae'
'Mesoceras belongs to Mesoceratidae'
'Mesoceratidae belongs to Discosorida'
'Mesochasmoceras belongs to Trigonoceratidae'
'Metacoceras belongs to Tainoceratidae'
'Metactinoceras is a subjective synonym of Actinoceras'
'Metaphragmoceras belongs to Nothoceratidae'
'Metarizoceras belongs to Oncoceratidae'
'Metarmenoceras belongs to Ormoceratidae'
'Metastromatoceras belongs to Cayutoceratinae'
'Metephippiorthoceras belongs to Proteoceratidae'
'Miamoceras belongs to Oncoceratidae'
'Michelinoceras belongs to Michelinoceratinae'
'Michelinoceratinae is an invalid subgroup of Cephalopoda'
'Microbactrites belongs to Parabactritidae'
'Micronoceras belongs to Brevicoceratidae'
'Millkoninckioceras belongs to Koninckioceratidae'
'Minganoceras belongs to Valcouroceratidae'
'Mirabiloceras belongs to Allotrioceratidae'
'Mitorthoceras belongs to Spyroceratinae'
'Mitroceras belongs to Brevicoceratidae'
'Mixosiphonoceras belongs to Jovellaniidae'
'Mojsvaroceras belongs to Tainoceratidae'
'Molossus belongs to Mammalia'
'Molossus belongs to Orthocerida'
'Monocyrtoceras belongs to Armenoceratidae'
'Monomuchites belongs to Proteoceratidae'
'Montyoceras belongs to Hebetoceratidae'
'Mooreoceras belongs to Pseudorthoceratinae'
'Moreauoceras belongs to Tarphyceratidae'
'Mstikhinoceras belongs to Ormoceratidae'
'Muiroceras belongs to Rutoceratidae'
'Multicameroceras belongs to Plectronoceratidae'
'Murrayoceras belongs to Baltoceratidae'
'Mysterioceras belongs to Mysterioceratidae'
'Mysterioceratidae belongs to Pseudorthocerataceae'
'Mysticoceras belongs to Proterocameroceratidae'
'Naedyceras belongs to Brevicoceratidae'
'Nanno belongs to Endoceratidae'
'Narthecoceras belongs to Narthecoceratidae'
'Narthecoceratidae belongs to Endocerida'
'Nassauoceras belongs to Tetragonoceratidae'
'Nautilaceae belongs to Nautilida'
'Nautilida belongs to Nautiloidea'
'Nautilidae belongs to Nautilaceae'
'Nautiloceras is a subjective synonym of Trigonoceras'
'Nautiloidea belongs to Cephalopoda'
'Nautilus belongs to Nautilidae'
'Nautilus (Solenochilus) was reranked as Solenochilus and belongs to Solenochilidae'
'Nelimenia belongs to Oncoceratida'
'Neocycloceras belongs to Pseudorthoceratinae'
'Neodiscosorus is a subjective synonym of Alpenoceras'
'Neokaipingoceras belongs to Endoceratoidea'
'Neorthoceras belongs to Orthocerida'
'Nephriticeras belongs to Nephriticeratidae'
'Nephriticeratidae belongs to Barrandeocerida'
'Nephriticerina belongs to Nephriticeratidae'
'Neptunoceras belongs to Neptunoceratidae'
'Neptunoceratidae belongs to Cephalopoda'
'Neumatoceras belongs to Oncoceratidae'
'Nothoceras belongs to Nothoceratidae'
'Nothoceratidae belongs to Oncoceratida'
'Notocycloceras belongs to Protocycloceratidae'
'Nybyoceras belongs to Armenoceratidae'
'Obinautilus belongs to Nautilidae'
'Octamerella belongs to Hemiphragmoceratidae'
'Oderoceras belongs to Proterocameroceratidae'
'Oelandoceras belongs to Ellesmeroceratidae'
'Offleyoceras belongs to Offleyoceratidae'
'Offleyoceratidae belongs to Orthocerataceae'
'Ohioceras belongs to Kionoceratinae'
'Oncoceras belongs to Oncoceratidae'
'Oncoceratida is corrected as Oncocerida and belongs to Nautiloidea'
'Oncoceratidae belongs to Oncoceratida'
'Oneotoceras belongs to Ellesmeroceratidae'
'Oocerina belongs to Oncoceratidae'
'Oonoceras belongs to Oncoceratidae'
'Ophidioceras is a subjective synonym of Ophioceras'
'Ophidioceratidae belongs to Tarphyceratida'
'Ophioceras belongs to Ophidoceratidae'
'Ordosoceras belongs to Polydesmiidae'
'Ormoceras belongs to Ormoceratidae'
'Ormoceratidae belongs to Actinocerida'
'Orthoceras belongs to Orthoceratinae'
'Orthoceratidae belongs to Orthocerataceae'
'Orthocerida belongs to Nautiloidea'
'Orthonybyoceras belongs to Ormoceratidae'
'Osbornoceras belongs to Karoceratidae'
'Ovoceras belongs to Brevicoceratidae'
'Ovocerina belongs to Mandaloceratidae'
'Oxygonioceras belongs to Brevicoceratidae'
'Oxynautilus belongs to Syringonautilidae'
'Pachendoceras belongs to Baltoceratidae'
'Pachtoceras belongs to Oncoceratida'
'Padunoceras belongs to Padunoceratidae'
'Padunoceratidae belongs to Intejocerida'
'Palaeoceras belongs to Plectronoceratidae'
'Palaeoteuthis belongs to Cephalopoda'
'Palmeroceras belongs to Spyroceratinae'
'Paquettoceras belongs to Barrandoceratidae'
'Parabactrites belongs to Parabactritidae'
'Parabactritidae belongs to Bactritida'
'Paracenoceras belongs to Paracenoceratidae'
'Paracenoceratidae belongs to Nautilitaceae'
'Paracleistoceras belongs to Acleistoceratidae'
'Paraconradoceras belongs to Nothoceratidae'
'Paracyclostomiceras belongs to Ellesmeroceratidae'
'Paracymatoceras belongs to Cymatoceratidae'
'Paradomatoceras belongs to Grypoceratidae'
'Paraendoceras belongs to Proterocameroceratidae'
'Parakionoceras belongs to Kionoceratinae'
'Paraloxoceras belongs to Pseudactinoceratinae'
'Parametacoceras belongs to Tainoceratidae'
'Paranautilus belongs to Liroceratidae'
'Paraphragmites belongs to Paraphragmitidae'
'Paraphragmitidae belongs to Orthocerataceae'
'Pararhiphaeoceras belongs to Rhiphaeoceratidae'
'Pararineceras belongs to Trigonoceratidae'
'Parascoceras belongs to Ascoceratinae'
'Parastenopoceras belongs to Grypoceratidae'
'Paravaginoceras belongs to Endoceratoidea'
'Paroocerina belongs to Oncoceratidae'
'Parormoceras belongs to Ormoceratidae'
'Parryoceras belongs to Cyrtogomphoceratidae'
'Peismoceras belongs to Lechritrochoceratidae'
'Penhsioceras belongs to Endoceratoidea'
'Pentameroceras belongs to Trimeroceratidae'
'Perigrammoceras is a subjective synonym of Cycloceras'
'Perimecoceras belongs to Nothoceratidae'
'Perioidanoceras belongs to Acleistoceratidae'
'Peripetoceras belongs to Liroceratidae'
'Permoceras belongs to Permoceratidae'
'Permoceratidae belongs to Trigonocerataceae'
'Permonautilus belongs to Liroceratidae'
'Petryoceras belongs to Spyroceratinae'
'Phacoceras belongs to Centroceratidae'
'Phaedrysmocheilus belongs to Tainoceratidae'
'Phloioceras belongs to Tainoceratidae'
'Phragmoceras belongs to Phragmoceratidae'
'Phragmoceratidae belongs to Discosorida'
'Phragmocerina belongs to Phragmoceratidae'
'Phragmosiphon belongs to Proterocameroceratidae'
'Pictetoceras belongs to Oncoceratida'
'Piersaloceras belongs to Graciloceratidae'
'Piloceras belongs to Piloceratidae'
'Pilotoceras belongs to Tarphyceratidae'
'Pionoceras belongs to Tarphyceratidae'
'Plagiostomoceras belongs to Michelinoceratinae'
'Planetoceras belongs to Koninckioceratidae'
'Platysiphon belongs to Proterocameroceratidae'
'Plectoceras belongs to Plectoceratidae'
'Plectoceratidae belongs to Barrandeocerida'
'Plectronoceras belongs to Plectronoceratidae'
'Plectronoceratidae belongs to Ellesmerocerida'
'Pleuronautilus belongs to Tainoceratidae'
'Pleuroncoceras belongs to Rutoceratidae'
'Pliendoceras belongs to Proterocameroceratidae'
'Polydesmia belongs to Polydesmiidae'
'Polydesmiidae belongs to Actinocerida'
'Polyelasmoceratidae belongs to Oncoceratida'
'Polygrammoceras belongs to Kionoceratinae'
'Poterioceras belongs to Poterioceratidae'
'Poterioceratidae belongs to Oncoceratida'
'Poteriocerina belongs to Acleistoceratidae'
'Potoceras belongs to Liroceratidae'
'Pradoceras belongs to Endoceratoidea'
'Pristeroceras belongs to Phragmoceratidae'
'Probillingsites belongs to Probillingsitidae'
'Probillingsitidae belongs to Ascoceratidae'
'Proclydonautilus belongs to Clydonautilidae'
'Procymatoceras belongs to Cymatoceratidae'
'Proendoceras belongs to Proterocameroceratidae'
'Projovellania belongs to Jovellaniidae'
'Proteoceras belongs to Proteoceratidae'
'Proteoceratidae belongs to Pseudorthocerataceae'
'Proterocameroceras belongs to Proterocameroceratidae'
'Proterovaginoceras belongs to Endoceratidae'
'Protobactrites belongs to Orthocerida'
'Protocycloceras belongs to Protocycloceratidae'
'Protokionoceras belongs to Geisonoceratidae'
'Protophragmoceras belongs to Phragmoceratidae'
'Pselioceras belongs to Grypoceratidae'
'Pseudactinoceras belongs to Pseudactinoceratinae'
'Pseudactinoceratinae belongs to Pseudorthoceratidae'
'Pseudaganides belongs to Pseudonautilidae'
'Pseudobactrites belongs to Bactritidae'
'Pseudocenoceras belongs to Nautilidae'
'Pseudocycloceras belongs to Spyroceratinae'
'Pseudocyrtoceras belongs to Pseudorthoceratinae'
'Pseudogomphoceras belongs to Mandaloceratidae'
'Pseudonautilidae belongs to Nautilitaceae'
'Pseudonautilus belongs to Pseudonautilidae'
'Pseudorthoceras belongs to Pseudorthoceratinae'
'Pseudorthoceratidae belongs to Pseudorthocerataceae'
'Pseudorthoceratinae belongs to Pseudorthoceratidae'
'Psiaoceras belongs to Tripleuroceratidae'
'Ptenoceras belongs to Rutoceratidae'
'Ptyssoceras belongs to Rutoceratidae'
'Pycnoceras belongs to Estonioceratidae'
'Quebecoceras belongs to Ellesmeroceratidae' according to Foerste 1925
'Rasmussenoceras belongs to Tripteroceratidae'
'Rayonnoceras belongs to Carbactinoceratidae'
'Reedsoceras belongs to Westonoceratidae'
'Reticycloceras belongs to Spyroceratinae'
'Retroclitendoceras belongs to Proterocameroceratidae'
'Rhadinoceras belongs to Nephriticeratidae'
'Rhiphaeoceras belongs to Rhiphaeoceratidae'
'Rhiphaeoceratidae belongs to Tainocerataceae'
'Rhiphaeonautilus belongs to Rhiphaeoceratidae'
'Rhomboceras belongs to Acleistoceratidae'
'Rhynchoceras is replaced by Rhynchorthoceras'
'Rhyncholithes belongs to Cephalopoda'
'Rhynchorthoceras belongs to Lituitidae'
'Rhynchoteuthis belongs to Cephalopoda'
'Richardsonoceras belongs to Oncoceratidae'
'Rineceras belongs to Trigonoceratidae'
'Rizoceras belongs to Oncoceratidae'
'Robsonoceras belongs to Robsonoceratidae' according to Ulrich and Foerste 1933
'Romingoceras belongs to Oncoceratidae'
'Roussanoffoceras belongs to Rutoceratidae'
'Rudolfoceras belongs to Protocycloceratidae'
'Ruedemannoceras belongs to Ruedemannoceratidae'
'Ruedemannoceratidae belongs to Discosorida'
'Ruthenoceras belongs to Plectronoceratidae'
'Rutoceras belongs to Rutoceratidae'
'Rutoceratidae belongs to Tainocerataceae'
'Sactorthoceras belongs to Sactorthoceratidae'
'Sactorthoceratidae belongs to Orthocerataceae'
'Saffordoceras belongs to Actinoceratidae'
'Sannionites belongs to Orthocerida'
'Savageoceras belongs to Barrandoceratidae'
'Scaptorrhynchus belongs to Cephalopoda'
'Sceptrites belongs to Spyroceratinae'
'Schuchertoceras belongs to Ascoceratinae'
'Scofieldoceras belongs to Oncoceratidae'
'Scyphoceras belongs to Scyphoceratidae'
'Scyphoceratidae belongs to Aipocerataceae'
'Seelyoceras belongs to Tarphyceratidae'
'Selkirkoceras belongs to Armenoceratidae'
'Shamattawaceras belongs to Probillingsitidae'
'Shantungendoceras belongs to Ellesmeroceratidae' according to Sun 1937
'Shideleroceras belongs to Shideleroceratidae'
'Shideleroceratidae belongs to Ellesmerocerida'
'Shikhanoceras belongs to Spyroceratinae'
'Sholakoceras belongs to Rhiphaeoceratidae'
'Shumardoceras belongs to Estonioceratidae'
'Shuranoceras belongs to Karoceratidae'
'Siberioceras is a subjective synonym of Orthonybyoceras'
'Siberionautilidae belongs to Clydonautilaceae'
'Siberionautilus belongs to Siberionautilidae'
'Sibyllonautilus belongs to Liroceratidae'
'Sicilioceras belongs to Bactritidae'
'Sidemina belongs to Endoceratoidea'
'Sigmocycloceras belongs to Sactorthoceratidae'
'Simardoceras belongs to Westonoceratidae'
'Simorthoceras belongs to Pseudorthoceratinae'
'Sinclairoceras belongs to Westonoceratidae'
'Sinoceras belongs to Michelinoceratinae'
'Sinoeremoceras belongs to Plectronoceratidae'
'Slocomoceras belongs to Acleistoceratidae'
'Smithvilloceras belongs to Ellesmeroceratidae'
'Solenochilidae belongs to Aipocerataceae'
'Somalinautilus belongs to Paracenoceratidae'
'Sphooceras belongs to Sphooceratidae'
'Sphooceratidae belongs to Orthocerataceae'
'Sphyradoceras belongs to Nephriticeratidae'
'Staufferoceras belongs to Valcouroceratidae'
'Stearoceras belongs to Grypoceratidae'
'Stemtonoceras belongs to Ellesmeroceratidae'
'Stenogomphoceras belongs to Trimeroceratidae'
'Stenopoceras belongs to Grypoceratidae'
'Stenosiphon belongs to Proterocameroceratidae'
'Stereoplasmoceras belongs to Stereoplasmoceratidae'
'Stereoplasmoceratidae belongs to Pseudorthocerataceae'
'Stereospyroceras belongs to Proteoceratidae'
'Stereotoceras belongs to Brevicoceratidae'
'Sthenoceras belongs to Phragmoceratidae'
'Stokesoceras belongs to Lowoceratidae'
'Stolbovoceras belongs to Armenoceratidae'
'Strandoceras belongs to Cyrtogomphoceratidae'
'Streptoceras belongs to Acleistoceratidae'
'Striacoceras belongs to Geisonoceratidae'
'Strionautilus belongs to Nautilidae'
'Stroboceras belongs to Trigonoceratidae'
'Stromatoceras belongs to Cayutoceratinae'
'Strombolituites is corrected as Ancistroceras and belongs to Lituitidae'
'Strophiceras belongs to Centroceratidae'
'Subclymenia belongs to Trigonoceratidae'
'Subpenhsioceras belongs to Endoceratoidea'
'Subspyroceras belongs to Orthocerida'
'Subtofangoceras belongs to Actinocerida'
'Subvestinautilus belongs to Koninckioceratidae'
'Suecoceras belongs to Endoceratidae'
'Suttonoceras belongs to Diestoceratidae'
'Sycoceras belongs to Oncoceratida'
'Syringoceras belongs to Syringonautilidae'
'Syringonautilidae belongs to Trigonocerataceae'
'Syringonautilus belongs to Syringonautilidae'
'Syrionautilus belongs to Cymatoceratidae'
'Syrreghmatoceras belongs to Rutoceratidae'
'Systrophoceras belongs to Lechritrochoceratidae'
'Tabantaloceras belongs to Parabactritidae'
'Tainionautilus belongs to Tainoceratidae'
'Tainoceras belongs to Tainoceratidae'
'Tainocerataceae belongs to Nautilida'
'Tainoceratidae belongs to Tainocerataceae'
'Talassoceras belongs to Thylacoceratidae'
'Tallinnoceras belongs to Emmonsoceratidae'
'Tanchiashanites belongs to Tainoceratidae'
'Tarphyceras belongs to Tarphyceratidae'
'Tarphyceratida is corrected as Tarphycerida and belongs to Nautiloidea'
'Teichertoceras belongs to Westonoceratidae'
'Temnocheilus belongs to Koninckioceratidae'
'Temperoceras belongs to Geisonoceratidae'
'Tetragonoceras belongs to Tetragonoceratidae'
'Tetragonoceratidae belongs to Tainocerataceae'
'Tetrameroceras belongs to Hemiphragmoceratidae'
'Tetranodoceras belongs to Rutoceratidae'
'Tetrapleuroceras belongs to Neptunoceratidae'
'Thoracoceras belongs to Kionoceratinae'
'Threaroceras belongs to Rutoceratidae'
'Thrincoceras belongs to Trigonoceratidae'
'Thuringionautilus belongs to Tainoceratidae'
'Thylacoceratidae belongs to Endocerida'
'Tienoceras belongs to Orthocerida'
'Tillicheilus belongs to Cephalopoda'
'Tirolonautilus belongs to Tainoceratidae'
'Titanoceras belongs to Grypoceratidae'
'Tithonoceras belongs to Paracenoceratidae'
'Tofangoceras belongs to Proteoceratidae'
'Trachynautilus belongs to Tainoceratidae'
'Tragoceras belongs to Estonioceratidae'
'Trematoceras belongs to Michelinoceratinae'
'Trematodiscus is replaced by Coelonautilus' according to Foord 1889
'Treptoceras is a subjective synonym of Orthonybyoceras'
'Tretoceras belongs to Orthocerida'
'Triendoceras belongs to Endoceratidae'
'Trifurcatoceras belongs to Endoceratoidea'
'Trigonoceras belongs to Trigonoceratidae'
'Trigonocerataceae belongs to Nautilida'
'Trigonoceratidae belongs to Trigonocerataceae'
'Trigonodema belongs to Oncoceratida'
'Trilacinoceras belongs to Lituitidae'
'Trimeroceras belongs to Trimeroceratidae'
'Trimeroceratidae belongs to Oncoceratida'
'Tripleuroceras belongs to Tripleuroceratidae'
'Tripleuroceratidae belongs to Oncoceratida'
'Triplooceras belongs to Nephriticeratidae'
'Tripteroceras belongs to Tripteroceratidae'
'Tripteroceratidae belongs to Oncoceratida'
'Tripterocerina belongs to Tripteroceratidae'
'Tripteroceroides belongs to Spyroceratinae'
'Trochoceras belongs to Rutoceratidae'
'Trochodictyoceras belongs to Lechritrochoceratidae'
'Trocholites belongs to Trocholitidae'
'Trocholitidae belongs to Tarphyceratida'
'Trocholitoceras belongs to Trocholitidae'
'Troedssonella belongs to Troedssonellidae'
'Troedssonoceras belongs to Ormoceratidae'
'Troostoceras belongs to Actinoceratidae'
'Tubiferoceras belongs to Phragmoceratidae'
'Tumidoceras belongs to Acleistoceratidae'
'Tunguskoceras is a subjective synonym of Armenoceras'
'Turnoceras belongs to Nothoceratidae'
'Turoceras belongs to Polyelasmoceratidae'
'Tuyloceras belongs to Lowoceratidae'
'Tylodiscoceras belongs to Koninckioceratidae'
'Tylonautilus belongs to Tainoceratidae'
'Tylorthoceras belongs to Rutoceratidae'
'Tyrioceras belongs to Lituitidae'
'Ulrichoceras belongs to Cyrtogomphoceratidae'
'Umbeloceras belongs to Mandaloceratidae'
'Uralorthoceras belongs to Pseudorthoceratinae'
'Uranoceras belongs to Uranoceratidae'
'Uranoceratidae belongs to Barrandeocerida'
'Utoceras belongs to Piloceratidae'
'Vaginoceras belongs to Endoceratidae'
'Valcouroceras belongs to Valcouroceratidae'
'Valcouroceratidae belongs to Oncoceratida'
'Vaningenoceras belongs to Endoceratidae'
'Vassaroceras belongs to Protocycloceratidae'
'Vaupelia belongs to Oncoceratidae'
'Venatoroceras belongs to Scyphoceratidae'
'Ventroloboceras belongs to Ellesmeroceratidae'
'Verticoceras belongs to Brevicoceratidae'
'Vespoceras belongs to Mandaloceratidae'
'Vestinautilus belongs to Trigonoceratidae'
'Virgaloceras belongs to Grypoceratidae'
'Virgoceras belongs to Geisonoceratidae'
'Wadeoceras belongs to Polyelasmoceratidae'
'Walcottoceras belongs to Protocycloceratidae'
'Wanwanoceras belongs to Plectronoceratidae'
'Welleroceras belongs to Poterioceratidae'
'Wellsoceras belongs to Tetragonoceratidae'
'Westonoceras belongs to Westonoceratidae'
'Westonoceratidae belongs to Discosorida'
'Wetherbyoceras belongs to Oncoceratida'
'Whiteavesites belongs to Clinoceratidae'
'Whitfieldoceras belongs to Clinoceratidae'
'Wichitoceras belongs to Trocholitidae'
'Wilsonoceras belongs to Apsidoceratidae'
'Winnipegoceras belongs to Westonoceratidae'
'Wissenbachia belongs to Brevicoceratidae'
'Wolungoceras belongs to Troedssonellidae'
'Woosteroceras belongs to Ellesmeroceratidae'
'Worthenoceras belongs to Acleistoceratidae'
'Xenoceras belongs to Poterioceratidae'
'Xenocheilus belongs to Pseudonautilidae'
'Yehlioceras belongs to Endoceratoidea'
'Zittelloceras belongs to Oncoceratidae'