Hexarhopalus Fairmaire, 1896

Jiang, Ri-Xin, Bai, Xing-Long, Ren, Guo-Dong, Yang, Hui-Yu & Wang, Shuo, 2020, A taxonomic revision of the genus Hexarhopalus (Coleoptera, Tenebrionidae Cnodalonini) from China, Zootaxa 4821 (2), pp. 277-304 : 297-298

Key to species of the genus Hexarhopalus Fairmaire, 1896 from China (based of Ren & Xu, 2011)

1 Elytra ovoid or elongate ovoid, humeri obtuse; metathoracic wings reduced (subgenus Hexarhopalus Fairmaire, 1891 )..... 2

- Elytral margins subparallel-sided, prominent humeri; and metathoracic wings fully developed (subgenus Leprocaulus Fair-maire, 1896)......................................................................................... 6

2 Elytral interstices with a row of shiny tubercles................................................... H. attenuatus

- Elytral interstices without tubercles....................................................................... 3

3 Pronotum groove W-shaped in anterior part................................................. H. liuyixiaoi sp. nov.

- Pronotum groove not strongly sinuate in anterior part......................................................... 4

4 Pronotum coarsely punctate and wrinkled......................................................... H. sculptilis

- Pronotum finely punctate, not wrinkled.................................................................... 5

5 Elytral interstices clearly carinate and undulate, anterior margin of pronotum completely marginated...... H. mangshanicus

- Elytral interstices convex, but not carinate, anterior margin of pronotum marginated only in anterior angles... H. sculpticollis 6 Pronotum covered with small punctures and lacking wrinkles, elytra covered by small tubercles....................... 7

- Pronotum covered with small punctures and anomalous wrinkles, elytra covered by small tubercles..................... 8

7 Inner projection of protibia situated in the middle, elytral foveolate punctures sparse............. H. qiujianyueae sp. nov.

- Inner projection of protibia situated before the middle, elytral foveolate punctures more dense.............. H. bisinuatus

8 Protibia strongly expanded and obviously crude.............................................................. 9

- Protibia slightly expanded, and weakly crude............................................................... 10

9 Length of pronotal hairs 2x longer than diameter of eye facets, median line of pronotum well marked......... H. difformis

- Length of pronotal hairs 1.5x longer than diameter of eye facets, median line of pronotum not obvious ..... H. qiului sp. nov.

10 Body dark black, with shallow and unordered wrinkles on pronotum, tubercles of elytra smaller......... H. xuhaoi sp. nov. Body brown, wrinkles on pronotum more deep, tubercles of elytra larger..................................... H. xui