Children (14 direct children, 34 direct and indirect children):
Kosmoceras
(tree size 4)
Sigaloceras
Kepplerites
(tree size 11)
Seymourites
Gowericeras
(tree size 2)
Gulielmiceras
Spinikosmoceras
Toricellites
Lobokosmoceras
(tree size 2)
Catasigaloceras
Gulielmina
Epicosmoceras
Gulielmites
Spinikosmokeras
(tree size 1)