Plate 6 From United States Geological Survey Professional
Paper 167,
Lower Triassic Ammonoids From North America
By James Perrin Smith
Ammonoid from the Lower Triassic Union Wash
Formation, Union Wash, Inyo County, California. Side, front and
rear views of a larval specimen, 2.5 millimeters in diameter,
Inyoites oweni.