Decapod anatomy Decapod anatomy The decapod crustacean, such as a crab, lobster, shrimp or prawn, is made up of 20 body segments grouped into two main body parts, the cephalothorax and the pleon (abdomen). Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail: The head also bears the (usually stalked) compound eyes. The distal portion of a mandible or maxilla which has a sensory function is known as a palp. Maxillipeds are appendages modified to function as mouthparts. Particularly in the less advanced decapods, these can be
Stripe-throated hermit been considered a subspecies of the little hermit ("P. longuemareus"), but morphological data suggest it may be closer to the grey-chinned hermit ("P. griseolaris"). At present most, if not all, major authorities accept the split (SACC, the Clements check list, the Howard & Moore check list, etc.). It has been suggested that the mainly Central American taxon "saturatus", which typically is considered a subspecies of "P. striigularis", may deserve species status, in which case it would become the dusky hermit or Boucard's hermit ("P. saturatus"). The taxon "adolphi" is considered a junior synonym of "saturatus" by most authorities. It occurs