Stomis collucens ( Fairmaire, 1888 )

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 : 9-10

Stomis collucens ( Fairmaire, 1888)

Loc. typ.: China, Yunnan.

This species is the earliest described of this group and of the entire genus from China (Holotype in Fig. 26 ). It seems rather common in the Yulongshan area in north Yunnan, since I have seen several specimens collected in different moments by different expeditions.

Description. Habitus as in Fig. 10 . The combination of characters allowing to distinguish this species are: length 10.1–12.3 mm; integuments metallic green; 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 well-developed and convex; pronotum anteriorly wide, then markedly constricted and sinuate towards the base; basal angles almost square; 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. 37 ). Ratios: El/Pl = 2.16; Ew/Pw = 1.47; El/Ew = 1.46.

Distribution. Yunnan, Yulongshan mountain range.

Material examined: Prov. Yunnan bor., Heishui env.: 2 ♂ ♀ ( CS) ; NW Yunnan, N of Lijang, Jade Dragon Mt. , 10 ♂ ♀ ( CS) ; Yunnan, Yulongshan mts. , 27.10N 100.13E, 3500–4000 m: 1 ♀ ( CS) .

Figures

FIGURES 25–28. Historical types; habitus of: (25) S. deuvei HT (7.5 mm); (26) S. collucens HT (10.4 mm); (27) S. chinensis HT (8.1 mm); (28) S. stefani HT (10.8 mm).

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.