Two new species of Nanocassiope Guinot, 1967, are described, N. oblonga from French Polynesia, and N. tridentata from Indonesia. This brings to six the number of species attributed to the genus, with four found in the Indo-West Pacific region.
Crustacea, Decapoda, Brachyura, Xanthidae, Nanocassiope, Pacific, Indonesia, French Polynesia, new species