Abstract
ABSTRACTA new deep-sea species of amphipod collected at a depth of 1317 m from the soft bottom of the Bay of Campeche, SW Gulf of Mexico, is herein described. The sediment included a high proportion of silt and organic carbon. The specimen examined in this study was collected during the Oceanographic Expedition Xcambó-4, along the Bay of Campeche, aboard the RV Justo Sierra. The new species represents the sixteenth known species of the genus Psammogammarus worldwide. This new species is the second Psammogammarus recorded from the deep sea, and the first record of the genus for the Gulf of Mexico. Identification keys to males and females of Psammogammarus species are provided. Psammogammarus barrerai sp. nov. is characterised by head with anteroventral notch present; gnathopods 1 and 2 palmar margins oblique, and basis of pereopod 7 forming a wide serrated posterior lobe.www.zoobank.org/urn:lsid:zoobank.org:pub:C843777B-FF15-4AEC-B046-6513A96A9BFF
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