Isculitidae

The Isculitidae is a family of Middle Triassic Ptychitaceae (ceratitid ammonoid cephalopods) characterized by smooth, involute, subglobular shells with ceratitic to subammonitic sutures in which the outer whorl is eccentric, offset to one side. Now includes Isculites, Columbisculites, Hypisculties, and Phyllosphaerites, and has included Smithoceras, and questionably Thanamites as well.