Palezoic Era By zattai mcbride May 8, 1111 530 mya Its a hard shell animal called a trilobites , but now extinct class of arthropods. May 8, 1112 44.6 Ordovician fauna was very diverse May 8, 1113 57 mya May 8, 1114 426 mya May 9, 1114 43 mya hangfish
