Triomicrus punctifrons Löbl, Kurbatov and Nomura

Shen, Jia-Wei & Yin, Zi-Wei, 2016, The genus Triomicrus Sharp from central and southwestern China (Coleoptera: Staphylinidae: Pselaphinae), and a revised key to the Chinese species, Zootaxa 4097 (3), pp. 369-380 : 376-377

Triomicrus punctifrons Löbl, Kurbatov and Nomura

( Figs 7–9 )

Triomicrus punctifrons Löbl, Kurbatov and Nomura, 1998: 76 .

Type material examined. Paratype (in MHNG, Fig. 9): ♂, three printed labels: ‘ China: Sichuan, Wolong Natur. Res., 500 m, litter, 16.v.94, leg. Kurbatov / Triomicrus punctifrons sp. n. Kurbatov & Löbl / Paratype (yellow)’.

Other material examined. (10 ♂♂, 11 ♀♀, all in SNUC). 1 ♂, 1 ♀, labeled ‘ China: Chongqing City, Chengkou County (城 口县), East Daba Shan (大巴山)， lower Huang'an-Gou (黄 安沟), 31°51’23’’N, 109°07’17’’E, 2039 m, 22. iv.2008, Hao Huang & Wang Xu leg.’; 1 ♂, labeled ‘ China: Sichuan Prov., Bazhong City, Nanjiang Coun. (南江县), Micang Shan (米仓山), Daba (大坝), 32°39’83’’N, 107°01’79’’E, 1798 m, 27.iv.2008, Hao Huang & Wang Xu leg.’; 5 ♂♂, 6 ♀♀, labeled ‘ China: Shaanxi, Nanzheng County (南 郑县), Liping Forest Park (黎平), 32°50’20’’N, 106°36’18’’E, 1400–1600 m, mixed leaf litter, sifted, 15.vii.2012, Y.H. Pan leg.’; 2 ♂♂, 2 ♀♀, labeled ‘ China: Sichuan, Dujiangyan City, Qingcheng Shan (青城山), Baiyun Temple (白 云寺), 30°56’56’’N, 103°28’28’’E, mixed leaf litter, sifted, 1650 m, 27.vii.2009, Yin, Peng & Dai leg.’; 1 ♂, 2 ♀♀, labeled ‘ China: Sichuan, Dujiangyan City, Qingcheng Shan, Cuiying Lake (翠映湖), 30°55’53’’N, 103°28’15’’E, mixed leaf litter, sifted, 1300 m, 31.vii.2009, Yin, Peng & Dai leg.’.

Remarks. Males of this species can be easily separated from those of all other congeners by a combination of the following characters: antennomeres XI enlarged, with a protuberance near the base ( Fig. 7 B, 7C); protibiae with small apical protuberance; mesotibiae with small apical spur; abdominal sternite VII with apical lamina ( Fig. 7 F) transverse, pointed at apex of lateral margin. This species was described from Wolong Nature Reserve, and here we record it also from eastern Daba Shan, Micang Shan, Liping Forest Park and Qingcheng Shan. Illustrations of the sternite VII ( Figs 7 F, 8A–C) and the aedeagus ( Figs 7 G, 8D–F) found for each population are provided here.

Distribution. Southwest China: Chongqing and Sichuan, Northwestern China: Shaanxi. (new provincial record).

Figures

FIGURE 7. Diagnostic characters of male Triomicrus punctifrons. A. Habitus. B. Antennal club, in dorsal view. C. Same, in lateral view. D. Protibia in lateral view. E. Mesotibia in lateral view. F. Abdominal sternites VII – VIII. G. Aedeagus, in dorsal view. Scale bars: A = 0.5 mm; B, C = 0.2 mm; D – G = 0.1 mm.

FIGURE 8. Diagnostic characters of male Triomicrus punctifrons from various localities. A. Abdominal sternites VII – VIII (population from Liping Forest Park). B. Same (population from Micang Shan). C. Same (population from Qingcheng Shan). D. Aedeagus, in dorsal view (population from Liping Forest Park). E. Same (population from Micang Shan). F. Same (population from Qingcheng Shan). Scale bars: A – F = 0.1 mm.