Parafrechites Ammonite Assemblage from Nevada

These Triassic ammonites coming from Nevada likely swam the seas with the first Ichthyosaurs (large sea going reptiles that looked like dolphins), for which they were probably a major food source for the Icthyosaurs. This was also a time when the various continents of moderns times comprised a single landmass called Pangaea.

These ammonites are found in a very hard limestone and are very difficult to prepare, which is why they are rarely seen on the market. These are the best examples of these ammonites I’ve collected, and that was some 20 years ago.