Triomicrus damingensis 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 : 516

Triomicrus damingensis Shen and Yin , new species

( Fig. 6 )

Type material (1 ♂, 1 ♀). Holotype: China: ♂, labeled ‘ China: Zhejiang, Linan City, Daming Shan (大明山), 30°02’04’’N, 118°59’14’’E, mixed leaf litter, sifted, 860 m, 07.vii.2014, Jia-Yao Hu leg.’ ( SNUC). Paratypes: China: 1 ♀, same data as holotype ( SNUC).

Diagnosis. Antennomere XI with small, disc-like protuberance near base, moderately prominent. Head with median vertexal carina. Pronotum finely and sparsely punctate. Elytral subhumeral sulci long, reaching level of metacoxae. Profemora simple, protrochanters and protibiae lacking spur or spine, mesotibiae lacking denticle. Apical lamina of abdominal sternite VII short, with rounded apex. Aedeagus with internal sac bearing several sclerotized spines, lacking hairy sclerite.

Description. Male ( Fig. 6 A). Length 2.00 mm. Head longer than wide, HL 0.48 mm, HW 0.43 mm, with median vertexal carina; lateral portions of frons finely and sparsely punctate; each eye composed of about 34 facets. Antennomere XI ( Fig. 6 B–C) with small, disc-like protuberance near base, moderately prominent, diameter of protuberance about one-seventh of segmental length. Pronotum wider than long, PL 0.40 mm, PW 0.50 mm, with fine and sparse punctation. Profemora simple, protrochanters and protibiae lacking spur or spine, mesotibiae lacking denticle. Elytra wider than long, EL 0.65 mm, EW 0.83 mm, smooth; subhumeral sulci reaching level of metacoxae. Abdomen wider than long, AL 0.48 mm, AW 0.75 mm; abdominal tergite IV (first visible tergite) with discal carinae extending to three-fifths of tergal length; abdominal sternite VII modified ( Fig. 6 D), with apical lamina short, with round apex. Length of aedeagus ( Fig. 6 E) including parameres 0.29 mm, with internal sac bearing several sclerotized spines, lacking hairy sclerite.

Female. Similar to male; antennomere XI unmodified. Each eye composed of about 22 facets. Measurements: BL 1.94 mm, HL 0.47 mm, HW 0.38 mm, PL 0.38 mm, PW 0.45 mm, EL 0.68 mm, EW 0.80 mm, AL 0.43 mm, AW 0.73 mm.

Distribution. Eastern China: Zhejiang.

Etymology. This species is named after the type locality, Daming Mountain.

Figures

FIGURE 6. Diagnostic characters of Triomicrus damingensis, 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.