The new species is known only from phreatic waters found in two caves located at Cerro de Santiago, a Cambrian limestone outcrop within the municipality of Cazalla de la Sierra (Seville, southern Spain). The area is next to Riera de Benalija, a tributary brook to the Guadalquivir River that flows into El Pintado reservoir. The cave lakes are hydrographically connected to the reservoir so that their level follows the annual oscillation of the reservoir’s water table. Specimens were found crawling in high numbers on the bottom of the cave lakes and were readily attracted by bait. Some specimens were observed venturing in open water, but most remained associated to the substratum. Direct observations did not suggest the species carried an interstitial life. Crustaceans found accompanying the new species at the time of sampling include Metahadzia uncispina Notenboom, 1988; Salentinella seviliensis Platvoet, 1987; Stenasellus escolai Magniez, 1977; Microcharon marinus Chappuis and Delamare, 1954; Megacyclops brachypus Kiefer, 1954; Diacyclops bicuspidatus odessanus (Shmankevich, 1875); Cypria ophtalmica (Jurine, 1820) and a not yet determined harpacticoid copepod. In addition, the bathynellid syncarid Hexabathynella sevillaensis Camacho, 2005, was recently described from the same caves (Camacho, 2005).