Sinaphaenops, Ueno & Wang, 1991

Ma, Zijun, Huang, Sunbin & Tian, Mingyi, 2020, Two new species of cavernicolous trechines from central Guizhou and northwestern Guangxi, China (Coleoptera: Carabidae: Trechinae), Zootaxa 4861 (4), pp. 581-593 : 587

Key to species of the banshanicus species group of the genus Sinaphaenops

(modified from Chen, Huang & Tian, 2020)

1 Right mandible tridentate, protibia with a longitudinal sulcus (subgenus Sinaphaenops (s. str.) Uéno & Wang)........... 2

- Right mandible bidentate, protibia without a longitudinal sulcus........................................................................... subgenera Thaumastaphaenops Magrini, Vanni & Zanon and Dongaphaenops Deuve & Tian

2 Body stouter, neck constriction comparatively wide.......................................................... 3

- Body slenderer, neck constriction distinctly narrow.................................... mirabilissimus species group

3 Pronotum with pair of lateral-marginal setae ( banshanicus species group)......................................... 4

- Pronotum without lateral-marginal setae................................................. trisetiger species group

4. Pronotum shorter ( Fig. 2A ), male genitalia with a distinct sagittal aileron ( Fig. 4 )........ S. (s. str.) chengguangyuani n. sp.

- Pronotum longer ( Fig. 2B, C ), male genitalia without sagittal aileron............................................ 5

5 Hind angles acute......................................................... S. (s. str.) lipoi Chen, Huang & Tian

- Hind angles obtuse................................................... S. (s. str.) banshanicus Tian, Chen & Tang

Figures

FIGURE 2. Pronotum of Sinaphaenops species (A. S. (s. str.) chengguangyuani n. sp., holotype, male; B. S. (s. str.) lipoi, holotype, male; C. S. (s. str.) banshanicus, holotype, male).

FIGURE 4. Male genitalia of Sinaphaenops (s. str.) chengguangyuani n. sp., holotype (A. median lobe and parameres, lateral view; B. apex of median lobe, dorsal view; C. genital ring, ventral view).