| Resumo: |
A new species of Amphipoda, Psammogammarus caesicolus, is described from interstitial, anchihaline waters in Blauwbaai cave, Curaçao, Netherlands Antilles. By the morphology of the third uropod, the new species links the somewhat aberrant Ps. longiramus from the Red Sea with the type-species of the genus, Ps. coecus, from the Mediterranean. The classification of the Eriopisa complex, to which Psammogammarus belongs, is reviewed, resulting in a stricter delimitation of, presumably monophyletic, genera, and the creation of three new genera: Madapisella (type-species Eriopisa madagascarensis Ledoyer, 1968), Nippopisella (type-species Eriopisella nagatai Gurjanova, 1965), and Tunisopisa (type-species Eriopisa seurati Gauthier, 1936). The distribution of the known species over the various genera is revised as well.
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