Children (33 direct children, 732 direct and indirect children):
Endocerida
(tree size 36)
Nautilida
(tree size 257)
Orthocerida
(tree size 114)
Actinocerida
(tree size 31)
Barrandeocerida
(tree size 1)
Ungulites
(tree size 2)
Discosorida
(tree size 48)
Ellesmerocerida
(tree size 38)
Intejocerida
(tree size 4)
Oncocerida
(tree size 81)
Tarphycerida
(tree size 59)
Basslerocerida
Faberoceras
Folioceras
Greenlandoceras
Gyroceras
Hoeloceras
Kosovoceras
Lituitida
Metrioceras
Nautilitoidea
Ophionautilus
Palelialia
Paleocadmus
Plectronoceratoidea
(tree size 5)
Pseudorthocerida
(tree size 21)
Wissenbachia
Zooceras
Huroniella
Neptunoceras
Uloceras
Palliocerida
(tree size 2)
Eudoceratidae