Two new Gammarus species from Benxi Water Cave, China (Crustacea, Amphipoda, Gammaridae)

Abstract

Two new Gammarus species, Gammarus pexus sp. n. and Gammarus stalagmiticus sp. n., are described from Benxi Water Cave, Liaoning Province, China. Gammarus pexus sp. n. is characterized by the peduncular articles 4 and 5 with groups of long setae and outer margin of outer ramus of uropod 3 only with simple setae. Gammarus stalagmiticus sp. n. differs from the congeneric species in the accessory flagellum of antenna 1 with 6 articles and uropod 3 densely provided with plumose and simple setae.