Valgina Mulsant, 1842

Ricchiardi, Enrico, 2017, Revision of Chinese mainland Hybovalgus Kolbe, 1904, with description of a new species, and Excisivalgus Endrödi, 1952 reduced to synonymy with Hybovalgus (Coleoptera: Scarabaeidae), European Journal of Taxonomy 340 (340), pp. 1-32 : 4-5

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

Figures

Fig. 7. A–C. Hybovalgus fraternus Moser, 1904. A–B. ♂ (ERC). A. Habitus, dorsal view. B. Propygidium and pygidium. C. ♂ (ERC), specimen with full colour scales pattern. D–I. Excisivalgus csikii Endrödi, 1952. D–E. HT, ♀ (ZFMK). D. Habitus, dorsal view. E. propygidium and pygidium. F–G. LT, ♂ (MNHUB). F. Aedeagus, dorsal view. G. Aedeagus, lateral view (grey: parameres; white: phallobase). H–I. 3 ♂♂ (IZAS), aedeagus of some Chinese specimens.

Fig. 9. Hybovalgus thibetanus (Nonfried, 1891). A–B. ♂ from Sichuan (ERC). A. Habitus, dorsal view. B. Propygidium and pygidium. C–D. ♂ from Yunnan (ERC). C. Habitus, dorsal view. D. Propygidium and pygidium. E–F. LT, ♂ (MNHUB). E. Aedeagus, dorsal view. F. Aedeagus, lateral view (grey: parameres; white: phallobase). G–H. ♀ from Sichuan (ERC). G. Habitus dorsal view. H. Propygidium and pygidium. I–J. ♀ from Shaanxi (ERC). I. Habitus, dorsal view. J. Propygidium and pygidium.

Fig. 8. A–F. Hybovalgus sexdentatus Arrow, 1944. A–B. ♂ (ERC). A. Habitus, dorsal view. B. Propygidium and pygidium. C–D. ♀ (ERC). C. Habitus, dorsal view. D. Propygidium and pygidium. E–F. PLT, ♂ (NHM). E. Aedeagus, dorsal view. F. Aedeagus, lateral view. G–J. Hybovalgus jordansi (Endrödi, 1952). G–H. ♂ (ERC). G. Habitus, dorsal view. H. Propygidiun and pygidium. I–J. PT, ♂ (HNHM). I. Aedeagus, dorsal view. J. Aedeagus, lateral view. K–N. Hybovalgus fulvosquamosus Moser, 1904. K–L. ♂ (ERC). K. Habitus, dorsal view. L. Propygidiun and pygidium. M–N. LT, ♂ (MNHUB). M. Aedeagus, dorsal view. N. Aedeagus, lateral view. Drawings: grey parts: parameres; white parts: phallobase.

Fig. 11. A–D. Hybovalgus tonkinensis Moser, 1904. A–B. ♂ from Fujian (ERC). A. Habitus, dorsal view. B. Propygidium and pygidium. C–D. PLT, ♂ (MNHUB). C. Aedeagus, dorsal view. D. Aedeagus, lateral view. E–I. Excisivalgus klapperichi Endrödi, 1952. E–F. HT, ♀ (ZFMK). E. Habitus, dorsal view. F. Propygidium and pygidium. G–I. PT, ♀ (ZFMK). G. Habitus, dorsal view. H. Habitus, ventral view. I. Propygidium and pygidium.