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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

Spiticeratinae (21290951)

Children (5 direct children, 12 direct and indirect children):

Aspidostephanus

Groebericeras (tree size 1)

Spiticeras (tree size 3)

Cantianiceras (tree size 2)

Proniceras (tree size 1)