Tibetitidae

The Tibetitidae is a family of more or less involute, compressed, middle and upper Triassic ceratitids included in the Clydonitaceae, which generally have a narrow venter bordered by tubercles or clavi at some stage. Whorl sides are ribbed and tuberculate, sutures ceratitic to ammonitic.

Distribution is wide spread. Their fossils have been found in in Alaska and California in the United States; British Columbia, Yukon, and Nunavut in Canada; China, Nepal, Laos, and Vietnam in Asia; Russia and Peru.