[3] Syringonautilus,[4] which has been found in the Alps, on Spitsbergen, in India and Japan has a rapidly expanding evolute shell with a perforate umbilicus and suboval whorl section.

Syringoceras,[5] found in Europe, on the island of Timur in Indonesia, and in western North America (Calif and Nev) is like Syringonautilus except that the siphuncle is near marginal.

Clymenonautilus,[6] first of the strictly Upper Triassic genera, is evolute with a perforate umbilicus and deep dorsal impression when the whorl envelops a third of the previous.

Oxynautilus,[5] differs from the rest in that it has an involute, compressed lenticular shell with a narrow or acute (angular) venter which may or may not have a keel.

Oxynautilus has been found in Europe in the Alps, in California in North America and in the Payandé Formation in Tolima, Colombia.

[7] Fossils of Syringonautilidae have been found in Austria, China, Colombia, Hungary, Italy, the Russian Federation, and the United States (California, Nevada).