Altelatipes falkenhaugae n. gen., n. sp. (Crustacea, Decapoda, Benthesicymidae) de la ride médio-atlantique nord

Seven specimens of a benthesicymid shrimp belonging to a new genus and a new species, Altelatipes falkenhaugae n. gen., n. sp., were obtained by fishing with a pelagic trawl on the northern Mid-Atlantic Ridge, down to a depth of 2300 m. Altelatipes n. gen. is very close to Benthesicymus and is distinguished by having a dorsal carina on the third abdominal segment, second maxilliped with an expanded merus concealing, in ventral view, the whole carpus-propodusdactylus when folded and a petasma with a ventrolateral lobule overreaching the dorsolateral lobule. Two other species, previously classified in Benthesicymus, B. carinatus Smith, 1884 and B. brevirostris Kikuchi & Nemoto, 1991, are here transferred to Altelatipes. Characters which separate the three species now in this genus, all of which occur in deep water, are differentiated in the rostrum, the carinae of the carapace, the sixth abdominal segment, the petasma and the appendix masculina.