Amphilochidae

摘要

One genus and two new species of amphilochid amphipods are reported from the Great Barrier Reef, mainly from Lizard Island. Two new species, Amphilochus justi sp. nov. mdA. lacertus sp. nov., are described. The Amphilochidae is defined by a laterallycompressed body, subchelate gnathopods, with at least coxa 1 vestigial, coxa 4 with well developed posteroventral lobe, urosomites not coalesced, no apical robust setae on the rami of uropods 1 and 2, iimer ramus of uropod 2 longer than outer, biramous third uropods and an entire, laminar, telson. According to McKinney (1978) members of the Amphilochidae are very common in the marine bottom fauna, especially from the coral reefs, but are often overlooked due to their small size (2-4 mm). They are usually considered to be nestlers with wide ecological niches. They are also known to be associates of ascidians, sponges and bivalves.