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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)
Nautiloid (Nautiloidea)
Nautilida
Trigonocerataceae (Trigonoceratoidea)

Trigonoceratidae (7841808)

Children (9 direct children, 9 direct and indirect children):

Discitoceras

Vestinautilus

Aphelaeceras

Chouteauoceras

Trigonoceras

Stroboceras

Rineceras

Triboloceras

Maccoyoceras