Straneostichus rotundatus ( Yu, 1992 )

Chen, Jia-Heng, Shi, Hong-Liang & Liang, Hong-Bin, 2022, Taxonomic notes on the Chinese endemic genus Straneostichus Sciaky, 1994 (Coleoptera: Carabidae: Pterostichini), with descriptions of three new species, Zootaxa 5182 (3), pp. 247-264 : 263-264

Straneostichus rotundatus ( Yu, 1992)

Chinese vernacular name: Bmḃ步ffl

( Figure 27 )

Aristochroa rotundata Yu 1992: 471 (type locality: Zhongdian, Yunnan); Xie & Yu 1993: 176.

Straneostichus rotundatus ( Yu, 1992) , Sciaky & Wrase, 1997: 1110.

Type material. The holotype male ( IZAS), “ Yunnan, Zhongdian, Hongshan , 4300 m ” / “ 1981.VIII.10. Wang Shuyong lgt.” / “ Aristochroa rotundata sp. nov. det. Yu Peiyu ” / “ holotype ”; 1 male paratype ( IZAS) , “ Yunnan, Zhongdian, Hongshan , 4300 m ” / “ 1981.VIII.10, Zhang Xuezhong lgt.” / “ paratype ” .

Non-type material. 6 males ( IZAS), “ Yunnan, Shangri-La (Zhongdian County), Hongshan pass, alpine meadow, 4307 m, N28.1411, E99.9078, under rock, 2018.VIII.7, Yan WF et al. lgt.” ; 3 males and 9 females ( IZAS), “ Yunnan, Shangri-La County, Hongshan pass, rhododendron shrub, 4468 m, N28.1474, E99.9037, pitfall trap, 2018. VIII.9, Yu SP et al. lgt.” .

Supplemental characters of male genitalia. Median lobe of aedeagus slender, MW / ML = 0.12–0.16; in lateral view, basal portion slightly expanded, apex gradually attenuate and bent downwards, the apical lamella not thickened; in dorsal view, the apical lamella quite longer than maximum width, strongly bent leftward, right margin slightly sinuate, apex rounded-truncated and a little widened; endophallic piece present on ventral surface of apical orifice, narrow and just weakly chitinized., invisible in dorsal or lateral view.

Remarks. This is a peculiar species in Straneostichu s because of its Aristochroa -like appearance. In our examined material, only five specimens have the dorsal color vivid metallic green or coppery ( Fig. 27B ), while the rest are completely or nearly black ( Fig. 27A ).

Distribution. This species was only known from Hongshan in Shangri-La City (Zhongdian County).

Figures

FIGURE 27. Straneostichus rotundatus (Yu, 1992).A‒B. dorsal habitus, male (Hongshan, Yunnan); C. dorsal habitus, holotype; D‒F. median lobe of aedeagus: right lateral (D), ventral (E) and dorsal (F) view. Scale: 5.0 mm for A‒C; 0.5 mm for D‒F.