_- Acanthoceratidae
- Acanthoclymeniidae
- Acrioceratidae
- Acrochordiceratidae
- Adrianitidae
- Aegocrioceratidae
- Agathiceratidae
- Agoniatitidae
- Albanitidae
- Amaltheidae
- Anarcestidae
- Ancyloceratidae
- Anisoceratidae
- Anthracoceratidae
- Aplococeratidae
- Arcestidae
- Arctoceratidae
- Arietitidae
- Aspenitidae
- Aspidoceratidae
- Asteroceratidae
- Aulacostephanidae
- Baculitidae
- Badiotitidae
- Balatonitidae
- Beloceratidae
- Binneyitidae
- Bisatoceratidae
- Bochianitidae
- Brancoceratidae
- Buchitidae
- Cardioceratidae
- Celtitidae
- Ceratitidae
- Cheiloceratidae
- Choristoceratidae
- Cladiscitidae
- Clionititidae
- Clydoniceratidae
- Clymeniidae
- Cochloceratidae
- Coeloceratidae
- Coilopoceratidae
- Collignoniceratidae
- Columbitidae
- Costaclymeniidae
- Cravenoceratidae
- Cyclolobidae
- Cymaclymeniidae
- Cymbitidae
- Dactylioceratidae
- Danubitidae
- Daraelitidae
- Delepinoceratidae
- Deshayesitidae
- Desmoceratidae
- Didymitidae
- Dieneroceratidae
- Dimeroceratidae
- Dimorphoceratidae
- Dinaritidae
- Diplomoceratidae
- Discophyllitidae
- Distichitidae
- Douvilleiceratidae
- Echioceratidae
- Engonoceratidae
- Entogonitidae
- Eoderoceratidae
- Episculitidae
- Eupleuroceratidae
- Flemingitidae
- Flickiidae
- Forbesiceratidae
- Gastrioceratidae
- Gattendorfiidae
- Gaudryceratidae
- Gephuroceratidae
- Girtyoceratidae
- Glaphyritidae
- Goniatitidae
- Gonioclymeniidae
- Gonioloboceratidae
- Graphoceratidae
- Gymnitidae
- Gyronitidae
- Haloritidae
- Hamitidae
- Hammatoceratidae
- Hamulinidae
- Haploceratidae
- Hedenstroemiidae
- Hellenitidae
- Hemihoplitidae
- Hemilecanitidae
- Heteroceratidae
- Hildoceratidae
- Himalayitidae
- Himantoceratidae
- Holcodiscidae
- Hoplitidae
- Hungaritidae
- Inyoitidae
- Isculitidae
- Joannitidae
- Juraphyllitidae
- Juvavitidae
- Kashmiritidae
- Kirsoceratidae
- Klamathitidae
- Knemiceratidae
- Koenenitidae
- Kosmoceratidae
- Kossmaticeratidae
- Labeceratidae
- Lanceolitidae
- Lecanitidae
- Leymeriellidae
- Liparoceratidae
- Lobitidae
- Longobarditidae
- Lyelliceratidae
- Lytoceratidae
- Macrocephalitidae
- Maenioceratidae
- Marathonitidae
- Maxigoniatitidae
- Maximitidae
- Medlicottiidae
- Megacrioceratidae
- Megaphyllitidae
- Melagathiceratidae
- Metalegoceratidae
- Metasibiritidae
- Mimagoniatitidae
- Mimoceratidae
- Mimosphinctidae
- Morphoceratidae
- Muensteroceratidae
- Muniericeratidae
- Nathorstitidae
- Neocomitidae
- Neodimorphoceratidae
- Neoglyphioceratidae
- Neoicoceratidae
- Nomismoceratidae
- Noritidea
- Nostoceratidae
- Oecoptychiidae
- Olcostephanidae
- Oosterellidae
- Ophiceratidae
- Oppeliidae
- Otoceratidae
- Otoitidae
- Oxynoticeratidae
- Pachyceratidae
- Pachydiscidae
- Palaeophyllitidae
- Paraceltitidae
- Paragastrioceratidae
- Parahoplitidae
- Paranoritidae
- Parapopanoceratidae
- Parashumarditidae
- Parathisbitidae
- Parkinsoniidae
- Parodoceratidae
- Pericyclidae
- Perisphinctidae
- Perrinitidae
- Pharciceratidae
- Phylloceratidae
- Phymatoceratidae
- Pinacitidae
- Pinacoceratidae
- Placenticeratidae
- Platyclymeniidae
- Polymorphitidae
- Polyptychitidae
- Ponticeratidae
- Popanoceratidae
- Prionitidae
- Prionoceratidae
- Proarcestidae
- Procarnitidae
- Prodromitidae
- Prolecanitidae
- Prolobitidae
- Prolyelliceratidae
- Pronoritidae
- Proptychitidae
- Prosphingitidae
- Protancyloceratidae
- Proteusitidae
- Pseudoclymeniidae
- Pseudohaloritidae
- Pseudoparalegoceratidae
- Pseudotirolitidae
- Pseudotissotidae
- Psiloceratidae
- Ptychitidae
- Ptychoceratidae
- Pulchelliidae
- Ramositidae
- Reineckeiidae
- Reticuloceratidae
- Rhabdoceratidae
- Rotopericyclidae
- Sageceratidae
- Sandlingitidae
- Scaphitidae
- Schistoceratidae
- Schloenbachiidae
- Schlotheimiidae
- Shumarditidae
- Sibiritidae
- Silesitidae
- Sobolewiidae
- Somoholitidae
- Sonniniidae
- Sphaeroceratidae
- Sphenodiscidae
- Sphingitidae
- Spiroceratidae
- Sporadoceratidae
- Steinmannitidae
- Stephanoceratidae
- Strigoceratidae
- Sturiidae
- Taouzitidae
- Teicherticeratidae
- Tetragonitidae
- Thalassoceratidae
- Thamboceratidae
- Thanamitidae
- Thetiditidae
- Thisbitidae
- Tibetitidae
- Tissotiidae
- Tornoceratidae
- Trachyceratidae
- Tropiceltitidae
- Tropitidae
- Tulitidae
- Turrilitidae
- Ussuriidae
- Ussuritidae
- Vascoceratidae
- Vidrioceratidae
- Welleritidae
- Werneroceratidae
- Wiedeyoceratidae
- Xenoceltitidae
- Xenodiscidae