extinct arthropods

Is The Trilobite A Vertebrate Or Invertebrate? Common kinds of invertebrate fossils include molluscs (snails, bivalves and cephalopods), arthropods (trilobites), echinoderms (sea urchins and crinoids What type of invertebrate is a trilobite? Trilobites are an important group of extinct arthropods. Their bodies were divided into three segments: the head, body and tail. What are trilobites