Cochloceratidae

Cochloceratidae is a family of Upper Triassic Ammonoidea within the ceratitid superfamily Choristocerataceae that includes two genera, Cochloceras and Paracochloceras in which whorls are coiled in a spire, not coplanar. Their fossils have been found in British Columbia, Yukon, and Nevada. In general form they resemble the Upper Cretaceous Turrilitidae.