Specimens were collected directly with a hand-held plankton net in the cave lakes and fixed in situ in 95% ethanol. Once in the laboratory, they were dissected in lactic acid under the stereomicroscope, and appendages figured with a Leica DM2500 microscope equipped with Nomarski differential interference contrast and a drawing tube. Body measurements were derived from the sum of the maximum dorsal dimensions of body somites and exclude telson length. Type material is deposited in the invertebrate collection of Naturalis Biodiversity Center, Leiden (RMNH). Abbreviations and nomenclature used in morphological descriptions are as follows: A1 (antennule); A2 (antenna); G1-G2 (gnathopods I and II, respectively); P3-P7 (pereiopods III to VII, respectively); and U1-U3 (uropods I to III, respectively).