Two new species of the genus Bolboceras Kirby, 1819 (Coleoptera: Bolboceratidae Bolboceratinae) from India with an updated identification key of the Bolboceras nigricans Westwood, 1848 species group Author Kalawate, Aparna Sureshchandra Zoological Survey of India, Western Regional Centre, Vidya Nagar, Sector- 29, P. C. N. T. (PO), Rawet Road, Akurdi, Pune, Maharashtra 411044, India. Author Hillert, Oliver Kieferndamm 10, D- 15566 Schöneiche bei Berlin, Germany. text Zootaxa 2021 2021-04-23 4964 3 559 570 journal article 7058 10.11646/zootaxa.4964.3.7 a0254751-d2ac-481f-99b1-f995f8da110d 1175-5326 4715597 9DCEC917-64BE-4955-B7CD-DF5E15FBDAF4 Bolboceras bopdevense Kalawate & Hillert , new species ( Table 1 , Figs. 1A–E , 4C , 5 ) Type locality . Kondhwa , Pune District , Maharashtra , India ( 18.477N , 73.894E , 700 m a.s.l. ) . Type material . Holotype , male (collection of B.S. Lamba , ZSI-WRC, ENT-1/3534), “Bopdev Ghat, Kondhwa taluk, Pune district , Maharashtra , India , ( 18.477N , 73.894E , altitude 700 m ), 29 September 1968 ”. Description of holotype , male ( Fig. 1E ). Body distinctly convex, subglobular, dark brown and shiny. Head ( Fig. 1A , 4C ). Labrum with moderately concave anterior margin; transverse ridge distinct, fine; clypeus closely punctate; lateral perimarginal ridge of clypeus converging to single, anteromedian tubercle distinct, with very broad and blunt apex, oval in dorsal view. Perimarginal clypeal ridge distinct, k-shaped; frons smooth with few punctures; vertex distinctly, sparsely punctate; transversal interocular ridge strongly developed, almost straight, long, high, reaching to paraocular lines, lateral slope slight; Anterior edge of eye canthus straight, surface rugopunctate, distinctly upturned, forming distinctly elevated ridge with anterolateral blunt tubercle; paraocular line fine, almost straight virtually, reaching beyond level of interocular elevation, but not reaching base of head. Pronotum ( Fig. 1B ). Slightly depressed anteromedially in lateral view; conical discoparamedian protrusions present, apex blunt, anterior declivity slightly steep; discolateral protrusions slightly elevated; discomedian impression deeply impressed, almost U-shaped; discolateral impressions moderately shallow; very finely punctate midline impression at basomedian surface. Anterolateral angle of pronotum ca 90°, with acute anterolateral point. Surface of pronotum finely doubly punctate, primary punctation present laterally, anteriorly and along the margins, abundant, clusters of 15–20 punctures from edge of lateral (punctate) fovea on basomedian surface; second type of punctures are sparse and minute; base marginated. Scutellum ( Fig. 1D ). Almost smooth with minute and scattered punctures. Elytra . With very shallowly impressed, finely punctate striae; intervals smooth. Legs . Protibiae with 6 distinct exterior denticles, diminishing in size from apex to base, bordered in black; apex of terminal spur robust, tapering, acute, hooked. Mesotibiae and metatibiae with slightly elevated, transverse carinae. FIGURE 1 . Holotype of Bolboceras bopdevense Kalawate & Hillert new species . A , head in dorsal view; B , pronotum in dorsal view; C , aedeagus dorsal (left), lateral (middle), ventral (right); D , scutellum ; E , dorsal habitus, not to scale. Aedeagus ( Fig. 1C ). Parameres acuminate, moderately curved at middle, tip acute. Lateral sclerotized aedeagal stalks robust, strongly sclerotized in basal and the upper portion, middle portion membranous, finely pointedhooked tip, recurved at apex, extending beyond the parameres. Measurements . Body length: 11.46 mm , width: 7.14 mm . Head, length in dorsal view excluding labrum and mandibles: 1.80 mm , width: 3.42 mm ; interocular ridge: 1.59 mm ; ocular distance: 2.26 mm . Pronotum length: 4.17 mm , width: 6.80 mm . Scutellum length: 1.14 mm , width: 1.24 mm . Elytra, sutural length: 4.38 mm , maximum width combined: 6.99 mm . Genital capsule width 1.20 mm . Differential diagnosis . The newly described species is closely related to B. sahyadriense Kalawate & Hillert, 2018 . Both species are characterized by clypeal tubercle situated at front edge of clypeus, perimarginal ridges of clypeus k-shaped and interocular ridge distinct, long and straight at the middle of the eye. The new species can be distinguished by a broadly elongate and well-developed clypeal tubercle in dorsal view. The anterior margin of genae is distinctly upturned, forming distinct elevated ridge, more or less weakly tuberculate at the middle of the front. The aedeagus is distinctly different, especially the lateral sclerotized aedeagal stalk ( Fig. 1C ). Other closely related species are B. nigricans and B. trimbakense Kalawate & Hillert , new species described below. The new species can be distinguished by the position and shape of the interocular ridge and the characteristics of the aedeagus. To separate this species from the other two, follow the key below and compare with Fig. 1C ; Kalawate & Hillert (2018: 597 , Figs. 2G–H ) and Krikken (2013a: 51 , Fig. 33). Female. Unknown. Etymology . The species is named after the type locality, Bopdev Ghat of the Pune district, Maharashtra . Distribution . Known only from the type locality “Bopdev, Pune District, Maharashtra , India ”.