Children (8 direct children, 48 direct and indirect children):
Placenticeras
(tree size 17)
Karamaiceras
Karamaites
Hengestites
Proplacenticeras
(tree size 4)
Rapidoplacenticeratinae
(tree size 2)
Hoplitoplacenticeras
(tree size 16)
Metaplacenticeras
(tree size 1)