ammonites
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Spinoceras

PaleoDB taxon number: 7604

Parent taxon: Problematica according to J. J. Sepkoski 2002

Sister taxa: Acanthoclava, Acanthosphaera, Acidotocarena, Acutitheca, Ainiktozoon, Aksuglobulus, Amiskwia, Amoebinella, Ampelitocystis, Amphoridium, Anabaritidae, Ancienta, Andobolus, Animikiea, Anzalia, Archaeooides, Archaeopetasus, Archaeorestis, Archaeotremaria, Archaeozoon, Aristophycus, Arthroon, Artimyctella, Ascosyrinx, Astropolithon, Aurisella, Babetosphaera, Baccanella, Bacinella, Bactryllium, Banffia, Bavlinella, Beltania, Beltina, Bensonia, Biconulites, Bicornifera, Bija, Bioistodina, Blastophycus, Bolonia, Bosworthia, Botomaella, Bovicornellum, Caelestites, Calciphyton, Calcisphaera, Cambrocassis, Cambroclavida, Cambrogeorgina, Canninginopsis, Caudomorpha, Caveacus, Cestites, Chabakovia, Chalasiocranos, Charaussaia, Chondropogon, Chuaria, Clausisphaera, Clavitella, Coeloscleritophora, Coleolidae, Coleoloida, Coleoloides, Confervites, Conophyton, Cribricyathea, Cristatodus, Cupithecidae, Cyclogeorgina, Cycloites, Cyrtochites, Dentachites, Dictyophycus, Dictyophyton, Dimorphoconus, Dinocardia, Dinomischus, Dolichomocelypha, Draffania, Dystachophycus, Ebriella, Ebrinula, Eldoniidae, Emeithella, Emmonsaspis, Enchostoma, Endosacculus, Entosphaeroides, Eoastrion, Eocucumaria, Eoescharopora, Eoglobella, Eophyton, Eosphaera, Epiphyton, Etacystis, Eumuensteria, Eurysolenpora, Facivermis, Falsebria, Fensiangia, Flabetheca, Foerstia, Foliaceria, Fomitchella, Forchhammera, Fusuconcharium, Gigartinites, Gilbertina, Globuloella, Gochtia, Granifer, Greysonia, Gunflintia, Gymnosolen, Gyrodendron, Hadrophycus, Haliserides, Halymenites, Harttites, Heliophycus, Henaniodus, Hensonella, Heosomocelypha, Hermesinella, Hermesinopsis, Heterosculpotheca, Hexagonaria, Himanthalites, Huangshandongella, Huishea, Huizenodus, Humboldtochaeta, Huroniospora, Hydrocytium, Hyphantaenia, Indocera, Isnella, Isthmolithus, Itieria, Jiangshanodus, Kakabekia, Kazakhstanotubulus, Kiehnensus, Koksodus, Korilacus, Labyrinthotuba, Labyrinthus, Ladinella, Lenaella, Libodiscus, Lidaconus, Lombardia, Lonchosaccus, Lukatiella, Mabiania, Mamillodus, Marcusodictyon, Megasphaera, Meghystrichosphaeridium, Melopetasus, Microancientia, Micropylepora, Microschedia, Miratheca, Mobergellidae, Mongoliacus, Mongolitesta, Nevadatubulus, Nicolarites, Ningqiangsclerites, Niphadus, Oesia, Onuphionella, Opabinia, Paiutiida, Palaeobotryllus, Paleocenosphaera, Pararenicola, Paropsonemidae, Parvulonoda, Phyllochiton, Platydendron, Plexoramea, Plicatolingula, Plinthokonion, Pollingeria, Polysiphonidia, Poratites, Porocystis, Portalia, Pragmotheca, Primaconulariella, Problematikum, Protoarenicola, Protobolus, Protomelission, Protopterygotheca, Psamathopalass, Pteromidae, Pterpmus, Ptiloncodus, Punctatus, Pyrgites, Quadratapora, Quadrorites, Radiaxialia, Radiomura, Redkinia, Redoubtia, Resegia, Rhagnura, Rhombocorniculum, Rotadiscidae, Rugatotheca, Sabelliditida, Sagittitheca, Salanacus, Scambocris, Scissotheca, Selenoplax, Seletinicus, Shamovella, Shetlandia, Shinteinella, Solenotia, Sphenopteron, Spiralella, Stefania, Stictoconus, Stoibostrombidae, Taitia, Tayshira, Tchangsichiton, Tintinnoidella, Tommotitubulus, Tridia, Triplicatella, Tubigeorgina, Tubulella, Tullimonstrum, Tumulduria, Tunudiscus, Tuvinia, Volborthellida, Wushicites, Yangtzesclerites, Yuliunia, Yunnanodus

Subtaxa: none