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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
Perisphinctoidea
Olcostephanidae

Olcostephaninae (23711758)

Children (11 direct children, 50 direct and indirect children):

Olcostephanus (tree size 21)

Subastieria (tree size 4)

Astieria (tree size 8)

Lemurostephanus

Satoites

Rogersites

Taraisites (tree size 2)

Valanginites (tree size 2)

Dobrodgeiceras

Ceratotuberculus (tree size 1)

Saynoceras (tree size 1)