Children (17 direct children, 17 direct and indirect children):
Hammatoceras discus
Hammatoceras vighi
Hammatoceras dumortieri
Hammatoceras lorteti
Hammatoceras lotharingicum
Hammatoceras magocsy
Hammatoceras pachu
Hammatoceras simulator
Hammatoceras trigonatum
Hammatoceras clavatum
Hammatoceras cappucinum
Hammatoceras strictum
Hammatoceras prinzi
Hammatoceras semilunatum
Hammatoceras vaceki
Hammatoceras costulosum
Hammatoceras insigne