Kensleylana briani, new genus, new species, is described from freshwater in the karst caves of the Miravet Ravine, northern Spain. The monotypic genus is characterised by extreme reduction of the pleon, which has all pleonites fused to the pleotelson, with only one short suture marking the division between the pleon and the pleotelson. The genus and species is further characterised by the uropod peduncle being elongate, round in cross-section, extending to the posterior margin of the pleotelson and terminating in a single short stub-like ramus. The appendage morphology is otherwise similar to that of Faucheria Dollfus & Viré, 1905, a monotypic, freshwater, cave-dwelling genus known only from southern France.