A revision of the freshwater crabs (Crustacea: Decapoda: Brachyura: Potamonautidae) of the Lake Kivu drainage basin in Central and East Africa Author Meyer, Kirstin S. Author Cumberlidge, Neil text Zootaxa 2011 3011 45 58 journal article 46436 10.5281/zenodo.207971 5356b007-a4f0-4717-9c58-053282421c27 1175-5326 207971 Key to species of Potamonautes in Lake Kivu ( Cumberlidge & Meyer 2011 ) and its drainage basin (present work) 1. Postfrontal crest complete, either distinct or faint............................................................ 2 - Postfrontal crest either incomplete or absent................................................................ 4 2. Anterolateral margin toothed; s3/s4 incomplete, not meeting top of sac; exorbital tooth large, pointed....... P. lirrangensis - Anterolateral margin smooth; s3/s4 complete, meeting top of sac; exorbital tooth either small or reduced to granule....... 3 3. Mandibular palp with small hard flap at junction between segments; lateral fold of G1 terminal article higher than medial fold.............................................................................................. P. minor - Mandibular palp simple, lacking hard flap at junction between segments; medial fold of G1 terminal article higher than lateral fold...................................................................................... P. perparvus 4. Medial and lateral margins of dorsal membrane of G1 uneven; s2/s3 faint or incomplete............................ 5 - Medial and lateral margins of dorsal membrane of G1 even; s2/s3 deep, completely crossing sternum................. 6 5. Distal meral tooth of P1 merus reduced to granule; terminal article of G1 slim, straight, tapering evenly to tip. P. bourgaultae - Distal meral tooth of P1 merus distinct, pointed; terminal article of G1 slim at base, significantly widened in middle, tapering sharply to narrow tip...................................................................... P. gonocristatus 6. s3/s4 complete, meeting top of sac; G1 terminal article straight....................................... P. idjwiensis - s3/s4 incomplete, not meeting top of sac; G1 terminal article curved............................................ 7 7. First carpal tooth low, blunt; subterminal segment of G1 with setose margins.......................... P. muta nd ensis - First carpal tooth distinct, pointed; subterminal article of G1 lacking setae.............................. P. semilunaris