Abstract
To date, the genus Cerconeotes Huys, 1992, has seven nominal species, all known mostly from marine interstitial waters. Here, Cerconeotes euryhalinus (Krishnaswamy, 1957), an incompletely described and little-known species, is redescribed in detail after designating the neotype, and an illustrated description is given for Cerconeotes huysi n. sp. Both species were collected from freshwater as well as brackish water hyporheic habitats in southeastern India. The morphological relationships of these species with their congeners are discussed, and two criteria of the original generic definition emended. Cerconeotes huysi n. sp. is unique in the genus in the shape and armature of leg 5 in both sexes, in the male leg 3 second endopodal segment with two smooth, spine-like reduced elements (one apical and one subapical), and the long caudal rami and their armature elements. It closely resembles C. euryhalinus. A brief note on the ecology of the species is also added.
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