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Biota (Life)
Eukaryote (Eukarya)
Podiata
Unikont (Unikonta)
Opisthokont (Opisthokonta)
Holozoa
Filozoa
Apoikozoa (Choanozoa)
Animal (Animalia)
Metazoa
Epitheliozoa
Eumetazoa
Bilateria
Nephrozoa (Eubilateria)
Protostome (Protostomia)
Spiralia (Spiralians)
Lophotrochozoa
Mollusca (Molluscs)
Cephalopod (Cephalopods)
Ammonoidea (Ammonoids)
Ceratitida
Otoceratina
Otocerataceae (Otoceratoidea)
Araxoceratidae
Araxoceratinae

Prototoceras (23838807)

Children (15 direct children, 15 direct and indirect children):

Prototoceras pulchriforme

Prototoceras hunanense

Prototoceras fengchengense

Prototoceras xiangulingense

Prototoceras complanatum

Prototoceras pachygyrum

Prototoceras japonicum

Prototoceras plicatum

Prototoceras multidenticulatum

Prototoceras anfuense

Prototoceras venustum

Prototoceras simplex

Prototoceras diluterotalum

Prototoceras inflatum

Prototoceras longilobatum