Triomicrus abhorridus Shen and Yin

Shen, Jia-Wei, Yin, Zi-Wei & Li, Li-Zhen, 2015, Triomicrus Sharp of Eastern China (Coleoptera: Staphylinidae: Pselaphinae), Zootaxa 4007 (4), pp. 509-528 : 510-511

Triomicrus abhorridus Shen and Yin , new species

( Fig. 1 )

Type material (3 ♂♂). Holotype: China: ♂, labeled ‘ China: S. Zhejiang, Lishui City, Fengyang Shan N. R. (凤阳 山), forest nr. Datianping (大田坪), 27°54’33’’-55’18’’N, 119°10’20’’-17’’E, mixed litter, moss, sifted, 1170–1300 m, 6.x.2013, Feng, Peng, Yu, Yin leg.’ ( SNUC). Paratypes: China: 1 ♂, labeled ‘ China: S. Zhejiang, Lishui City, Fengyang Shan N. R., forest nr. Lv’ye Hotel (绿野山庄), 27°53’59’’N, 119°09’41’’E, coniferous, bamboo, litter, sifted, 1170 m, 08.x.2013, Z. Peng, Y.-M. YU, Z.-W. Yin leg.’ ( SNUC); 1 ♂, labeled ‘ China: S. Zhejiang, Lishui City, Fengyang Shan N. R., pass to Huangmaojian (黄茅尖), 27°53’22’’-32’’N, 119°10’25’’-11’12’’E, mixed litter, under bank, sifted, 1500–1900 m, 05.x.2013, Peng, Yu, Feng leg.’ ( SNUC).

Diagnosis. Antennomere XI with small, disc-like protuberance near base, moderately prominent. Head with median vertexal carina. Pronotum densely and coarsely punctate. Elytral subhumeral sulci extending from foveae to level of metacoxae. Profemora simple, protrochanters and protibiae lacking spur or spine, mesotibiae lacking denticle. Abdominal sternite VII modified (apical margin of the lamina partially broken off). Aedeagus with right paramere curved mesally, internal sac bearing several sclerotized spines and a densely hairy sclerite.

Description. Male ( Fig. 1 A). Length 2.01–2.17 mm. Head slightly longer than wide, HL 0.45–0.49 mm, HW 0.43–0.45 mm, with median vertexal carina; lateral portions of frons sparsely punctate; each eye composed of about 34 facets. Antennomere XI ( Fig. 1 B–C) with small, disc-like protuberance near base, moderately prominent, diameter of protuberance about one-eighth of segmental length. Pronotum wider than long, PL 0.40–0.43 mm, PW 0.49–0.50 mm, entirely covered with dense and coarse punctation. Profemora simple, protrochanters and protibiae lacking spur or spine, mesotibiae lacking denticle. Elytra wider than long, EL 0.70–0.75 mm, EW 0.80–0.82 mm, finely punctate; subhumeral sulci extending from foveae to level of metacoxae. Abdomen wider than long, AL 0.45–0.50 mm, AW 0.73–0.75 mm; abdominal tergite IV (first visible tergite) with discal carinae extending to three-fourths of tergal length; abdominal sternite VII modified ( Fig. 1 D; apical margin of lamina partially broken off). Length of aedeagus ( Fig. 1 E) including parameres 0.31 mm, with right paramere curved mesally, internal sac bearing several sclerotized spines and densely hairy sclerite.

Female. Unknown.

Distribution. Eastern China: Zhejiang.

Etymology. The specific epithet ‘ abhorridus ’ means ‘rough, unsightly’, referring to the coarsely punctate pronotal disc.

Figures

FIGURE 1. Diagnostic characters of Triomicrus abhorridus, male. A. Habitus. B. Antennal club, in dorsal view. C. Same, in lateral view. D. Abdominal sternites VII – VIII. E. Aedeagus, in dorsal view. Scale bars: A = 0.5 mm; B, C = 0.2 mm; D, E = 0.1 mm.