Wholesale Flat, Authentic Elrathia kingii Trilobite Fossil, Cambrian Age, #4116

  

12 Pieces in 4 x 3.5 inch Fold Ups. Cambrian Age 510 Million Years. Trilobites were a large group of marine arthropods, which are invertebrate animals characterized by a segmented body and hard exoskeleton (crabs and lobsters). The first trilobites appeared over 500 million years ago in the Cambrian Period and spread worldwide until the Permian mass extinction about 250 million years later.

Their hard outer shell made them a great candidate for fossilization, and as a result they appear frequently in the fossil record. Over 25,000 species have been described!