Revision of the endemic Madagascan stag beetle genus Ganelius Benesh, and description of a new, related genus (Coleoptera: Lucanidae: Lucaninae: Figulini) Author Paulsen, M. J. Systematic Research Collections University of Nebraska State Museum W 436 Nebraska Hall Lincoln, NE 68588 - 0546 mjpaulsen@unl.edu text Insecta Mundi 2017 2017-12-29 2017 592 1 16 journal article 55466 10.5281/zenodo.5169525 4910761a-706e-4f53-a5a8-6c72379bdbc6 1942-1354 5169525 DA6CBFE5-927E-45B6-9D05-69AC97AF7B76 Agnelius Paulsen , new genus Type species. Nigidius nageli Kriesche , here designated. Description. Agnelius are moderately sized (12.0– 17.2 mm ) figuline species that lack sexually dimorphic mandibles. The mandibles of both sexes in this species are identical and are relatively simple but have a bifurcate dorsomedial tooth that is not found in other genera ( Fig. 32 ). In both sexes the smooth, minutely punctate pronotum has a weak anterior tubercle, but the anterior margin is simply concave and not produced on either side of the tubercle as in Ganelius . The pronotum disc is almost flat, never elevated anteriorly, and the longitudinal midline is weakly indicated by a slight depression. The male genitalia have a gradually narrowing flagellum that is less than 20 mm in length. Remarks. The species described as Nigidius nageli Kriesche differs morphologically from Ganelius species in significant ways, and as indicated by Fujita (2010) its placement within Ganelius is problematic. Among the Figulini , it shares the long flagellum of the male genitalia with Ganelius species , as well as a trilobed conjoined clypeus and labrum. However, unlike Ganelius , it lacks sexual dimorphism in the shape of the mandibles (males lacking the vertical ramus), the pronotum has a simply concave anterior margin with a weak anteromedial tubercle (vs. bisinuate margin and usually stronger tubercle), and its body is distinctly flattened and more elongate ( Fig. 21–25 ). The protibial dentition is different than in Ganelius , with large, contiguous teeth rather than isolated smaller teeth. For these reasons a new genus is erected for the species. Etymology. The name, gender masculine, is formed by corruption of Ganelius through rearranging letters to echo the name of the nearby and somewhat similar Mascarene figuline genus Agnus Burmeister.