Gnaptorina Reitter, 1887

Li, Xiu-Min, Bai, Xing-Long & Ren, Guo-Dong, 2019, Two new species of the genus Gnaptorina Reitter from the Hengduan Mountains, China (Coleoptera: Tenebrionidae: Blaptini), Zootaxa 4695 (1), pp. 83-89 : 83-84

Key to species of the nominal subgenus of Gnaptorina Reitter, 1887 (based on males)

1 Pronotum flattened laterally............................................................................. 2

- Pronotum not flattened laterally.......................................................................... 3

2 Pronotum narrowly depressed along lateral margins; ventral surface of 1 st– 2 nd segments of mesotarsi with hairy brush, 3 rd segment with hairy tuft at apex........................................................ G. kozlovi Medvedev, 1998

- Pronotum not depressed along lateral margins; ventral surface of 1 st segment of mesotarsi with hairy brush, 2 nd segment with hairy tuft at apex.................................................................. G. felicitana Reitter, 1887

3 Pronotum widest at base; elytral width at middle moderately longer than that at base; 1 st– 3 rd segments of protarsi widened, much wider than 4 th segment; ventral surface of 3 rd segment of mesotarsi with hairy brush......... G. platytarsia Li & Ren, 2004

- Pronotum widest at middle or before middle; elytral width at middle much longer than that at base; 1 st– 3 rd segments of protarsi not widened, nearly as wide as 4 th segment; ventral surface of 3 rd segment of mesotarsi without hairy brush, at most with hairy tuft at apex.......................................................................................... 4

4 Pronotum widest at middle.............................................................................. 5

- Pronotum widest before middle.......................................................................... 9

5 Anterior margin of frontoclypeus straight; antennae reaching pronotal base 1/3; posterior angles of pronotum nearly rectangular................................................................................ G. reitteri Koch, 1965

- Anterior margin of frontoclypeus weakly emarginate; antennae reaching pronotal base 1/4; posterior angles of pronotum rectangular............................................................................................. 6

6 Ventral surface of 1 st– 2 nd segments of protarsi with hairy brush, 3 rd segment with hairy tuft at apex; ventral surface of 2 nd segment of mesotarsi with hairy tuft at apex................................................................... 7

- Ventral surface of 1 st– 3 rd segments of protarsi with hairy brush, 4 th segment with hairy tuft at apex; ventral surface of 2 nd segment of mesotarsi with hairy brush............................................................................ 8

7 Anterior margin of pronotum straight, anterior angles rounded obtuse; ventral surface of 1 st segment of mesotarsi with hairy brush; metatibiae weakly curved.................................................. G. cylindricollis Reitter, 1889

- Anterior margin of pronotum weakly emarginate, anterior angles weakly obtuse; ventral surface of 1 st segment of mesotarsi with hairy tuft at apex; metatibiae straight........................................ G. rugosipennis Medvedev, 1998

8 Pronotal disc convex, anterior margin of pronotum deeply emarginate, anterior angles obtuse, not rounded apically........................................................................................... G. crassitibia sp. nov.

- Pronotal disc strongly convex, anterior margin of pronotum straight, anterior angles rounded obtuse... G. lii Li & Ren, 2004

9 Ventral surface of 1 st segment of protarsi with hairy brush, 2 nd– 4 th segments with hairy tuft at apex. G. fairmairei Koch, 1965

- Ventral surface of 1 st– 2 nd or 1 st– 3 rd segments of protarsi with hairy brush......................................... 10

10 Ventral surface of 1 st– 2 nd segments of protarsi with hairy brush, 3 rd segment or 3 rd– 4 th segments with hairy tuft at apex..... 11

- Ventral surface of 1 st– 3 rd segments of protarsi with hairy brush, 4 th segment with or without hairy tuft at apex........... 12

11 4 th– 7 th antennal segments short and cylindrical; lateral margins of pronotum narrowing from widest to base straightly; ventral surface of 3 rd– 4 th segments of protarsi with hairy tuft at apex; ventral surface of 1 st segment of mesotarsi with hairy brush, 2 nd segment with hairy tuft at apex; metatibiae straight.................................... G. australis Medvedev, 2008

- 4 th– 7 th antennal segments nearly spherical; lateral margins of pronotum narrowing from widest to base arcuately, weakly emarginate before base; ventral surface of 3 rd segment of protarsi with hairy tuft at apex; ventral surface of 1 st– 2 nd segments of mesotarsi with hairy tuft at apex; metatibiae weakly curved........................... G. kashkarovi Medvedev, 1998

12 Anterior margin of pronotum deeply emarginate, anterior angles nearly rectangular and sharp....... G. acutangula sp. nov.

- Anterior margin of pronotum straight or weakly emarginate, anterior angles obtuse................................ 13

13 Legs fully black..................................................................................... 14

- Femora brown to red, tibiae and tarsi brown to red or fully black............................................... 15

14 Anterior margin of pronotum weakly emarginated; ventral surface of 4 th segment of protarsi with hairy tuft at apex.................................................................................. G. miroshnikovi Medvedev, 1998

- Anterior margin of pronotum straight; ventral surface of 4 th segment of protarsi without hairy tuft at apex............................................................................................... G. media Medvedev, 1998

15 Tibiae and tarsi fully black................................................... G. potanini potanini Reitter, 1889

- Tibiae and tarsi brown to red........................................................................... 16

16 Ventral surface of 1 st– 2 nd segments of mesotarsi with hairy tuft at apex.......................................... 17

- Ventral surface of 1 st– 2 nd segments of mesotarsi with hairy brush............................................... 19

17 Lateral margins of pronotum strongly expanded outward at widest, posterior angles obtuse.... G. montana Medvedev, 1998

- Lateral margins of pronotum weakly expanded outward at widest, posterior angles rectangular....................... 18

18 Distance between punctures much more than their diameter on pronotal disc, punctures unconnected laterally, pronotal base without depression on each side; elytral surface with dense and shallow wrinkles, lateral carina not visible dorsally in posterior 1/3............................................................................. G. proxima Reitter, 1889

- Distance between punctures less than or equal to their diameter on pronotal disc, punctures connected laterally, pronotal base with a large and rounded depression on each side; elytral surface with denser and clearly wrinkles, lateral carina visible almost completely in dorsal view................................................ G. potanini minxiana Medvedev, 2008

19 Pronotal disc with quite fine punctures, laterally as large as those on disc of G. rufipes ; elytral punctures as fine as those on pronotal disc and shallow...................................................... G. curvatibia Ren & Zhu, 2016

- Pronotal disc with moderately coarse punctures, laterally coarse; elytral punctures as large as those on pronotal disc or laterally.......................................................................... G. rufipes Ren & Zhu, 2016