Prosthetops equestrius Perkins & Balfour-Browne, 1994

Bilton, David T., 2014, New species and new records of Pterosthetops: eumadicolous water beetles of the South African Cape (Coleoptera, Hydraenidae), Zootaxa 3811 (4), pp. 438-462 : 454

Prosthetops equestrius Perkins & Balfour-Browne, 1994

Restricted to Table Mountain and adjacent areas of the Cape Peninsula in the far southwest of the Western Cape. Type material from algae under stones, damp wall with algae and running stream with Glyceria . New records from rock faces below springs.

Additional records: 19/ix/2008 Western Cape, Table Mountain National Park, seepage over rock beside M64 road above Silvermine— 1 ♂; 24/ix/2010 Western Cape, Table Mountain National Park, Table Mountain, seepage over rock in Echo Valley ( Fig. 5 D)— 4 ♂, 4♀. Distribution Fig. 8 .

Figures

FIGURE 5. Habitats of Pterosthetops species. A) Cederberg, seepage over sloping rock beside stream @ 1,200 m below Wolfberg Arch, beside Matjiesrivier-Wupperthal road— P. coriaceus sp. nov., P. hawequas, P. impressus; B) Witzenberg, Michell’s Pass, wet rock face along R 46 road - P. baini sp. nov., P. hawequas, P. impressus (arrow indicates larva of Aspidytes niobe Ribera, Beutel, Balke & Vogler, 2002); C) Cederberg, Uitkyk Pass, seepages over rock face beside road— P. harrisoni, P. hawequas, P. impressus, P. pulcherrimus sp. nov., P. tuberculatus sp. nov., P. uitkyki sp. nov.; D) Table Mountain, seepage over rock in Echo Valley— P. equestrius, P. impressus. Photos D T & R Bilton.

FIGURE 8. Distribution of Pterosthetops species in the Western Cape: red symbols P. br i nc k i, green symbols P. equestrius, yellow symbols P. hawequas, white symbols P. indwei sp. nov., blue symbol P. swartbergensis sp. nov. Basemap source: ESri, GigitalGlobe, GeoEye, i-cubed, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, Swisstopo and the GIS User Community.