Transfer of three species of Namakwanus Scholtz & Howden to Versicorpus Deschodt, Davis & Scholtz or to Namaphilus gen. nov., with descriptions of two new species (Coleoptera: Scarabaeidae: Scarabaeinae) Author Deschodt, Christian M. Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa cdeschodt@zoology.up.ac.za Author Davis, Adrian L. V. Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa text Annals of the Ditsong National Museum of Natural History 2017 2017-05-01 7 7 109 114 journal article http://doi.org/10.5281/zenodo.5562912 9de32fb5-ae5c-4552-afdb-9cfdcad56ce9 5562912 NEW KEY TO THE GENERA AND SPECIES IN THE BYRRHIDIUM GROUP (adapted from Deschodt et al., 2016 ) 1 Foretibiawiththreeexternal denticles..... 2 — Foretibiawithtwoexternaldenticles ...... 8 2 Habitus relatively large, longer than 10 mm and elongate Versicorpus Deschodt, Davis dScholtz ......................... 3 — Habitus smaller than 10 mm long and convex ................................ 4 3 Mesometasternal suture curving forward; punctures on prosternum large; Erongo Mountain .... V. erongoense Deschodt, Davis & Scholtz — Mesometasternal suture straight; punctures on prosternum small; Tsondab Mountain ........................ V.streyi (Frolov) 4 Clypeal horns as long as, or longer than, distance between them ....... Namakwanus Scholtz & Howden … 5 — Clypeal horns shorter than distance between them .. Namaphilus gen. nov. Deschodt & Davis … 6 5 Space between clypeal horns about one and a half times more at base than the width of a single horn at apex; clypeal horns not upturned and slightly pointing inward at the apex; Windhoek area ................ N. iriSsi Scholtz & Howden — Spacebetween clypealhornsabouttwotimes greater at base than the width of a single horn at apex; clypeal horns more upturned and slightly pointing inward at the apex; Gobabebarea ........ N. scholtzi spec. nov . 6 Area between clypeal teeth somewhat arcuate .......... N. ameibensis spec. nov. — Areabetweenclypealteethstraight ...... 7 7 Tips of parameres with two notches in frontal view; Naukluft Mountains to the south of the Tsondab River canyon .... N. endroedyi (Deschodt,Davis & Scholtz) — Tips of parameres without notches in frontal view; HardapDam .... N. davisi (Deschodt & Scholtz) 8 Clypeus clearly bidentate with clypealhorns long ...... Dicranocara Frolov & Scholtz … 9 — Clypeus quadridentate, with short medial clypealhorns ....................... 12 9 Aedeagus without lateral horns on parameres ............................. 10 — Aedeagus with lateral horns on parameres .................................. 11 10 Apex of parameresbulky; northern Richtersveld...... D. inexpectata Deschodt & Scholtz — Apex of parameres slender; southern Richtersveld, Boom River ............. D. deschodti Frolov & Scholtz 11 Side horns on aedeagus extending somewhat sideways, tip curved downwards; Richtersveld National Park in South Africa .......... D. tatasensis Deschodt & Scholtz — Side horns on aedeagus slightly forward, tip not curved downwards; Fish River Canyon ......... D. vandersmisseni Moretto 12 Clypealhorns short, mesometasternal suture not well defined; south of Orange River ............. Byrrhidium Harold … 13 — Clypealhorns of medium length, mesometasternal suture well defined; north of Orange River ...... Drogo stalsi Deschodt, Davis & Scholtz 13 Aedeagus with side protrusions, fore tibia with outer teeth parallel; Richtersveld in South Africa ........... B. convexum Scholtz & Howden — Aedeagus plain with no side protrusions, fore tibia with outer teeth diverging; Namaqualand.................. B. ovale Harold NOTES ON THE CURRENTLY KNOWN SPECIES IN THE BYRRHIDIUM GROUP The Byrrhidium group is confined to the arid west of Namibia and South Africa ( Fig. 2 ). It currently consists of six genera and 14 described species. These species (Deschodt et al ., 2007, 2011, 2016) may mostly be associated with dung middens of rock hyraxes ( Procavia capensis ( Pallas, 1766 )). As there are gaps in the known range of this group relative to that of rock hyraxes ( Fig. 2 ), new related dung beetle species and genera may await discovery.