Stomis politus Ledoux & Roux, 1995

Sciaky, Riccardo, 2024, Review of the Chinese Stomis, with description of nine new taxa and a new key (Carabidae: Pterostichini), Zootaxa 5523 (1), pp. 1-34 : 10

Stomis politus Ledoux & Roux, 1995

Loc. typ.: China, Yunnan, Zhongdian.

I have been able to examine three male specimens of this species, previously known upon two female specimens only, and therefore I can give some further information on its status and systematic position. The aedeagal structure of this species allows me to confirm its belonging to the vicinity of S. collucens , still showing a few differences that prove its specific status.

Description. Habitus as in Fig. 11 . The combination of characters allowing to distinguish this species are: length 11.6–13.1 mm; integuments dark bronze; body rather convex; legs and antennae dark brown, of medium length; head broad, with mandibles almost as long as the rest of the head; eyes reduced and flat; pronotum anteriorly broad, then markedly constricted and sinuate towards the base; basal angles obtuse; elytra very broad, oval, widest almost in the middle, with striae well marked; shoulders rounded, without a tooth. Median lobe of aedeagus with apical portion almost as long as basal portion; in lateral view straight before apex, in dorsal view very broad and asymmetrical, without tooth but angulate on the left side ( Fig. 38 ). Ratios: El/Pl = 2.42; Ew/Pw = 1.36; El/Ew = 1.45.

Distribution. Yunnan, area around Zhongdian.

Material examined: Yunnan, Zhongdian co. , 17 km NW Zhongdian, 3500–4000 m: 2 ♂ ( CS) ; Yunnan, Zhongdian : 1 ♀ ( CS) ; NW Yunnan prov., env. Bailakou pass, 3600 m: 1 ♂ ( CS) .

Figures

FIGURES 9–12. Habitus of: (9) S. exilis ssp. pauli HT (10.9 mm); (10) S. collucens from Yunnan, Yulongshan (11.5 mm); (11) S. politus from Yunnan, Zhongdian (11.9 mm); (12) S. habashanensis from Yunnan, Habashan (14.2 mm).

FIGURES 37–38. Aedeagus in lateral and dorsal view of: (37) S. collucens from Yunnan, Yulongshan; (38) S. politus from Yunnan, Zhongdian.