Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Acadiocaris is an extinct genus of spelaeogriphacean crustacean that existed in Canada during the Lower Carboniferous period. It was first named by Brooks in 1962,and contains the species Acadiocaris novascotica, named by Copeland in 1957 for the Canadian province of Nova Scotia. It is the only species in the family Acadiocarididae.Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by the nauplius form of the larvae.