Children (16 direct children, 736 direct and indirect children):
Brancoceratidae
(tree size 263)
Coilopoceratidae
(tree size 24)
Collignoniceratidae
(tree size 160)
Tissotiidae
(tree size 16)
Vascoceratidae
(tree size 66)
Sphenodiscidae
(tree size 47)
Leymeriellidae
(tree size 9)
Flickiidae
(tree size 9)
Lyelliceratidae
(tree size 78)
Libycoceratidae
Forbesiceratidae
(tree size 13)
Pseudotissotiidae
(tree size 20)
Prolyelliceratidae
(tree size 13)
Buchiceratidae
Metoicoceratidae
Pseudotissotidae
(tree size 2)