During the Late Pliocene pelecypods and gastropods are known. The sea was home to animals such as cephalopods, gastropods, mosasaurs, pelecypods, and plesiosaurs. This setting was home to algae, brachiopods, bryozoans, fusulinids, ostracods, pelecypods, and trilobites. Smaller starfish feed on isopods, pelecypods and chitons. The state was home to brachiopods, bryozoans, cephalopods, crinoids, gastropods, pelecypods, and trilobites. Examples include brachiopods, bryozoans, corals, cephalopods, pelecypods, and trilobites. Late Cretaceous invertebrates included a bryozoan, coelenterats, gastropods, pelecypods, and scaphopods. Groups present included brachiopods, bryozoans, corals, gastropods, nautiloids, pelecypods, sponges, and trilobites. These included pelecypods and tube-building worms. This sea would have been home to cephalopods, crinoids, ichthyosaurs, and pelecypods. The familiar invertebrate groups including bryozoans, cephalopods, corals, gastropods, and pelecypods were all present. Ordovician pelecypods were preserved in Smith County. Cretaceous invertebrates of Delaware included annelids, cephalopods, crustaceans, gastropods, and pelecypods. Other fossils found include mollusks, ammonites, baculites, and pelecypods. Oklahoma's diverse Pennsylvanian life included blastoids, brachiopods, bryozoans, fusulinids, and pelecypods.