Viaphacops claviger
Lower Devonian
Wenban Limestone FM
Cortez Range
Nevada
USA
 
Ref: The Wenban Limestone is a formation of Early Devonian age. It is equivalent to part of the Nevada Group. In the Cortez Mountains the Wenban conformably and gradationally overlies the Roberts Mountains Formation (Stewart and McKee, 1977). In This layer you can find a very rare and unique fauna. These Trilobites are very rare and hard to prep...Viaphacops is one of the most characteristic trilobites in this formation.