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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
Acanthoceratoidea
Collignoniceratidae
Collignoniceratinae

Prionocyclus (23838985)

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

Prionocyclus hyatti

Prionocyclus novimexicanus

Prionocyclus pluricostatus

Prionocyclus branneri

Prionocyclus albinus

Prionocyclus germari

Prionocyclus macombi

Prionocyclus bosquensis

Prionocyclus carvaholi

Prionocyclus wyomingensis

Prionocyclus quadratus