Children (14 direct children, 292 direct and indirect children):
Kosmoceratidae
(tree size 34)
Otoitidae
(tree size 23)
Stephanoceratidae
(tree size 58)
Macrocephalitidae
(tree size 23)
Thomboceratidae
(tree size 5)
Cardioceratidae
(tree size 56)
Sphaeroceratidae
(tree size 36)
Thamboceratidae
(tree size 4)
Cadoceratidae
(tree size 15)
Tulitidae
(tree size 8)
Mayaitidae
(tree size 7)
Clydoniceratidae
(tree size 7)
Oecoptychiidae
(tree size 2)
Riccardiceras