| Different views of nine ammonoids from the Lower Triassic Thaynes Formation, Nevada. Scale bar equals 1 centimeter (0.39 inch). Called scientifically, Elkoceras spathi. Photograph courtesy a specific technical document. |
| Different views of nine ammonoids from the Lower Triassic Thaynes Formation, Nevada. Scale bar equals 1 centimeter (0.39 inch). Called scientifically, Elkoceras spathi. Photograph courtesy a specific technical document. |