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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)
Ammonitida
Ammonitina
Stephanocerataceae (Stephanoceratoidea)

Sphaeroceratidae (21219591)

Children (6 direct children, 36 direct and indirect children):

Labyrinthoceras

Megasphaeroceras

Sphaeroceras (tree size 2)

Eurycephalitinae (tree size 28)

Oecoptychoceras

Mayaitinae