First Atlantic record of the rare infaunal shrimp Salmoneus erasimorum Dworschak, Abed-Navandi amp; Anker, 2000 (Malacostraca: Decapoda: Alpheidae).

The rare symbiotic alpheid shrimp Salmoneus erasimorum Dworschak, Abed-Navandi Anker, 2000 was previously known from a single specimen collected with a suction pump on the Croatian coast in the Adriatic Sea, together with its host, the ghost shrimp, Gilvossius tyrrhenus (Petagna, 1792). A second record of S. erasimorum is presented here, with a diagnosis and the first colour photographs, based on a single specimen collected in northern Brittany, France, also with a suction pump, but without its host. This is also the first record of the species on the European coast of the Atlantic Ocean. An annotated list and a key to the species of Salmoneus currently known from the eastern Atlantic and the Mediterranean Sea are provided.