Related how?

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
Hammatoceratoidea
Hammatoceratidae
Hammatoceratinae

Geczyceras (23838715)

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

Geczyceras porcarellense

Geczyceras bonarellii

Geczyceras clausum

Geczyceras costatum

Geczyceras galaczi

Geczyceras perplanum

Geczyceras allobrogense

Geczyceras speciosum

Geczyceras martinezae