Nevada Cambrian Trilobite Olenellus gilberti

Description: A beautifully preserved specimen of this widespread species that is found in Nevada and California. The genus is restricted to the early Cambrian (540-520 million years ago), making them good index fossils. They have a most distinctive large cephalon containing crescentic eyes, making them quite attractive to collectors. Most are only found as a preserved cephalon, making those from the famous Pioche Shale highly desirable.