Achelata

The Achelata is an infraorder of the decapod crustaceans, holding the spiny lobsters, slipper lobsters and their fossil relatives.

==Description== The name "Achelata" derives from the fact that all the members of this group lack the chelae (claws) that are found on almost all other decapods (from the Ancient Greek , = "not", , = "claw"). They are further united by the great enlargement of the second antennae, by the special "phyllosoma" form of the larva, and by a number of other characters.