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
Haplocerataceae (Haploceratoidea)

Oppeliidae (7098541)

Children (27 direct children, 247 direct and indirect children):

Berniceras (tree size 1)

Oppelia (tree size 21)

Bradfordia (tree size 2)

Aconeceras (tree size 6)

Oxycerites (tree size 4)

Alcidellus

Creniceras (tree size 6)

Distichoceras

Magharina

Oecotraustes (tree size 1)

Uhligites (tree size 1)

Hecticoceras (tree size 8)

Hecticoceratinae (tree size 41)

Ochetoceratinae (tree size 26)

Oppeliinae (tree size 4)

Streblitinae (tree size 14)

Phlycticeratinae (tree size 3)

Mazapilitinae (tree size 5)

Aconeceratinae (tree size 11)

Taramelliceratinae (tree size 43)

Distichoceratinae (tree size 9)

Glochiceratinae (tree size 7)

Bonarelliinae (tree size 3)

Cieneguiticeras (tree size 1)

Pasottia (tree size 1)

Naramoceras (tree size 1)

Bukowskites (tree size 1)