Revision of Chinese mainland Hybovalgus Kolbe, 1904, with description of a new species, and Excisivalgus Endrödi, 1952 reduced to synonymy with Hybovalgus (Coleoptera: Scarabaeidae) Author Ricchiardi, Enrico F09BCF76-35DE-4821-91C4-EEDC5114810A&2DE7F73C-A515-418C-A2AC-5394D5AB44C1 Corso A. Tassoni 79 / 4, 10143 Torino, Italy. Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Box 92, Beichen West road, Chaoyang District, Beijing, 100101, China; University of the Chinese Academy of Sciences, Yuquan road, Shijingshan, Beijing, 100039, China. alericor@fastwebnet.it&545407454@qq.com text European Journal of Taxonomy 2017 2017-08-01 340 340 1 32 journal article 22065 10.5852/ejt.2017.340 0be43b36-2678-45a5-acfc-bec202ecb14a 2118-9773 3832552 2C6DC937-E543-4B8D-BF24-CED437F97676 Subtribe Valgina Mulsant, 1842 ( Bouchard et al. 2011 ) Checklist of Chinese Hybovalgus Hybovalgus bioculatus Kolbe, 1904 calvus sp. nov. fraternus Moser, 1915 = Excisivalgus csikii Endrödi, 1952 fulvosquamosus Moser, 1904 sexdentatus Arrow, 1944 jordansi ( Endrödi, 1952 ) thibetanus ( Nonfried, 1891 ) = versicolor Moser, 1908 = laticollis Arrow, 1944 = Valgus pubicollis Pic, 1928 = Valgus savioi (Pic, 1928) = yunnanus Moser, 1906 tonkinensis Moser, 1904 = Excisivalgus klapperichi Endrödi, 1952 Key to males 1. Pronotal carinae present as rounded elevations or barely noticeable ................................................ 2 – Pronotal carinae sharp (sometimes only slightly sharp).....................................................................4 2. Pronotal posterior margin slightly protruding backwards, apex rounded ......................................... 3 – Pronotal posterior margin simply rounded ............................................... H. bioculatus Kolbe, 1904 3. Pronotal carinae parallel, barely noticeable or nearly obsolete, short or long (at most ⅓ pronotal length). Meso- and metatibiae each without central tooth on posterior sides ........ H. calvus sp. nov. – Pronotal carinae arched outwardly, ending well after middle of disc. Meso- and metatibiae each with a prominent central tooth on posterior side ............................................ H. tonkinensis Moser, 1904 4. Protibia with 6 external teeth: teeth 1–3 long and sharp, teeth 4–6 short and slightly sharp ................ ................................................................................................................ H. sexdentatus Arrow, 1944 – Protibia with 5 external teeth: teeth 1–3 long and sharp, teeth 4–5 short and slightly sharp ............ 5 5. Posterior margin of pronotum simply rounded; pronotal lateral margin not arched toward inside on posterior half ..................................................................................................................................... 6 – Posterior margin of pronotum at center more or less prominent; pronotal lateral margins noticeably arched on posterior toward inside in the second half ........................................................................ 7 6. Pronotum suboval ( Fig. 7A ), lateral small carina obsolete. Anal sternites covered with recumbent, testaceous scales, sparse on disc and dense laterally ................................. H. fraternus Moser, 1915 – Pronotum subtrapezoidal ( Fig. 9A ), lateral small carina present, posteriorly arching outwards. Anal sternites completely covered with thick, recumbent, testaceous scales ............................................... ........................................................................................................... H. thibetanus ( Nonfried, 1891 ) 7. Pronotal posterior margin at center slightly prominent, with apex rounded ( Fig. 8K ); pronotal lateral small carina obsolete ....................................................................... H. fulvosquamosus Moser, 1904 – Pronotal posterior margin at center prominent, V-shaped, apex rounded on top only ( Fig. 8G ); pronotal lateral small carina present, posteriorly arching outwards ....... H. jordansi ( Endrödi, 1952 ) Key to females (females of H. fulvosquamosus and H. jordansi are unknown) 1. Pronotal carinae present as rounded elevations or noticeable and short ........................................... 2 – Pronotal carinae sharp (sometimes only slightly sharp) .................................................................... 3 2. Pronotal posterior margin at center excavated in shape of an enlarged “E”. Metatibia without central tooth at center of posterior margin ........................................................... H. bioculatus Kolbe, 1904 – Pronotal posterior margin at center prominent, V-shaped. Metatibia with a barely noticeable tooth at center of posterior margin ....................................................................................... H. calvus sp. nov. 3. Protibia with 5 external teeth ............................................................................................................ 4 – Protibia with 6 external teeth ................................................................. H. sexdentatus Arrow, 1944 4. Pronotal posterior margin at center deeply excavated as an enlarged “E” ( Fig. 11E ) .................. .......................................................................................................... H. tonkinensis Moser, 1904 – Pronotal posterior margin at center slightly excavated as an enlarged “C” ( Fig. 9G ) ......... 5 5. Elytra near scutellum deeply depressed and with prominent ridges. Pygidium without cretaceous maculae ............................................................................................. H. thibetanus ( Nonfried, 1891 ) – Elytra near scutellum depressed but without ridges. Pygidium on sides covered with cretaceous maculae ...................................................................................................... H. fraternus Moser, 1915