New species and new records of Pterosthetops: eumadicolous water beetles of the South African Cape (Coleoptera, Hydraenidae) Bilton, David T. Zootaxa 2014 3811 4 438 462 78LRQ Perkins & Balfour-Browne, 1994 Perkins & Balfour-Browne 1994 [151,851,1733,1759] Insecta Hydraenidae Pterosthetops Animalia Coleoptera 16 454 Arthropoda species harrisoni