Two views each of two Inyoceras bittneri ammonoids (left to right: 18mm and 19mm in diameter, respectively), all from the Neopopanoceras zone, Lower Triassic Union Wash Formation, Union Wash, Inyo County, California. Photograph courtesy Jean Guex, Alexandre Hungerbühler, James F. Jenks, Luis O’Dogherty, Viorel Atudorei, David G. Taylor, Hugo Bucher, and Annachiara Bartolini.

At last field check, the locality still lies outside the Southern Inyo Wilderness area; always check with the local BLM (Bureau of Land Management) rangers to secure the most recent information regarding hobby fossil collecting at Union Wash.