Phliantidae

Phliantidae is a family of isopod-like amphipod crustaceans chiefly from the southern hemisphere.

==Description== Members of the family Phliantidae are unusual among the order Amphipoda, because they have dorso-ventrally flattened bodies with a pronounced dorsal keel, rather than being flattened side-to-side. Because of this, and various other factors, including the square-ended form of the rostrum, they resemble isopods.