Children (29 direct children, 94 direct and indirect children):
Harpoceras
(tree size 20)
Polyplectus
(tree size 4)
Pseudolioceras
(tree size 16)
Tugurites
Kolymoceras
Harpoceratoides
Glyptarpites
(tree size 1)
Tardarpoceras
(tree size 1)
Lioceras
(tree size 1)
Maconiceras
(tree size 1)
Phaularpites
(tree size 1)
Falcifericeras
Pseudowalkericeras
Buckmanites
Praehaploceras
(tree size 1)
Pseudopolyplectus
Osperleioceras
(tree size 8)
Micropolyplectus
Tiltoniceras
(tree size 3)
Praepolyplectus
Pacificeras
Ochotoceras
Leptarpites
Elegantuliceras
Eleganticeras
(tree size 4)
Ovaticeras
(tree size 3)
Cleviceras
(tree size 1)
Taffertia
Sphenarpites