Trilobites of the Wheeler Shale Formation

Trilobites of the Wheeler Shale Formation include Elrathia kingi and Peronopsis interstrictus. While there are many species of trilobites that come from the rocks of the Wheeler Shale Formation these are the two most common. Elrathia kingi belong to the order of trilobites called Ptychopariida. The Peronopsis belong to the order Agnostida. The Wheeler Shale Formation is one of the most famous middle Cambrian trilobite locations is the world. The trilobites we sell are about 550 million years old and are found in Millard County, Utah.