Peracarida (Peracarids) is a superorder of typical crustaceans. There are 23697 species of Peracarids, in 3704 genera and 425 families. It includes groups like Hooded Shrimp, Isopods, and Amphipods.
Definition: Hard framework, internal or external, which supports and protects softer parts of plant, animal or unicellular organism, and to which muscles usually attach in animals, includes skeletons (derived from Lawrence, 2005).
