Frechites nevadanus, Parafrechites meeki, Paraceratites vogdesi, Nevadites
Mollusca, Class Cephalopoda, Subclass
Ammonoidea, Order Ammonitida
inch): Matrix 4 1/4" X 6 3/4" (110mm X 170mm) F. nevadanus 1
1/16" "A" , Largest P. meeki 1 1/4" "B"
, P. vogdesi 2" ( 51mm) "C" , N. furlongi 13/16" (21mm)
Favrett Formation, Pershing County, Nevada
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. This
was also a time when the various continents of moderns times comprised
a single landmass called Pangaea.
particular plate contained four different species. They are found
in a very hard limestone and are very difficult to prepare, which
is why they are rarely seen on the market.
Also see: Ammonite