Trechus xiei, Deuve, 1992

Belousov, I. A. & Kabak, I. I., 2021, Three new species of the genus Trechus Clairville, 1806 from Sichuan (Coleoptera: Carabidae: Trechini), Russian Entomological Journal 30 (4), pp. 401-421 : 402

The xiei -species group

The group includes species from northern and central Sichuan. It can be characterized by the following set of character states: medium to small body size, habitus robust and convex, color pale testaceous to brownish, occasionally with blackish elytra; eyes medium to rather small, pronotum with base clearly oblique on sides and small hind angles. The most important diagnostic feature of the group is the structure of the male genitalia: the median lobe small to medium, with a short comma-like endophallus armature pointed apically. The group is named after Trechus xiei Deuve, 1992 from Wolong (“col de Balangshan”), Sichuan [ Deuve, 1992], the first described member of the group. Species of the group occur mostly in the upper forest belt, often near timber-line, rarely — in the lower alpine zone, but, to date, no species appears to be exclusive for high altitude alpine meadows.