Stenus malickyi Puthz, 2008

Lv, Wei-Xiang, Zhao, Cai-Yun & Zhou, Hong-Zhang, 2018, Ta xonomic study on the Chinese Steninae (Coleoptera, Staphylinidae), with descriptions of three new species of the Genus Stenus Latreille, Zootaxa 4429 (2), pp. 247-268 : 264-267

7. Stenus malickyi Puthz, 2008

( Figs.13 & 14 )

Puthz, 2008: 183 (Type locality: Thailand: Doi Inthanon); Puthz, 2013b: 1343.

Type material. China: Yunnan: Lushu Contry, Luzhang town, YaoJiaping village (25°58'19.9'' N, 98°42'37. 9'' E), 1male, 1 female, 2468 m, 3–4.V.2015, Mei-Ying Lin leg. (IZ-CAS).

Redescription. BL: 7.3 mm, FL: 3.25 mm, HW: 0.96 mm, PL: 1.0 mm, PW: 0.73 mm, EL: 1.41 mm, EW: 1.35 mm, SPL: 1.13 mm.

Macropterous; body black with bright luster and white pubescence dense. Antennae, maxillary palpi and legs yellowish. Clypeus black, labrum dark brown with moderately densely pubescent; paraglossae oval.

Head distinctly narrower than elytra. Interocular area with two shallow and broad longitudinal furrows, median portion scarcely convex, not reaching the level of dorsal eye margins; punctures round, mostly well delimited, the diameter of large punctures is about as wide as the basal cross section of antennal segment II; interstices smooth, most larger than half the diameter of punctures. Antenna slender, when reflexed extending beyond the posterior margin of pronotum.

Pronotum distinctly longer than broad, broadest in posterior half; disk uneven, without distinct median longitudinal furrow; punctures round, mostly well delimited, slightly smaller than those on head; interstices distinctly reticulated, mostly larger than the diameter of punctures.

Elytra trapezoid, slightly longer than wide; shoulders prominent, posterior margin deeply emarginated; humeral impression and long sutural impression indistinct; punctures and interstices are similar to those of pronotum.

Legs slender, tarsomeres IV deeply bilobed.

Abdomen cylindrical, only tergites III with line-like paratergites, tergites IV–VI with rudimentary lateral border; tergite VII with distinct apical membranous fringe; punctures round to elliptic, punctures round, gradually becoming smaller and sparser posteriad; interstices smooth, interstices on tergite VII larger than punctures.

Male: sternite VIII ( Figs. 13 F & 14 B ) with a large and deep triangular emargination in posterior middle; sternite IX ( Figs. 13 G & 14 C ) with weak serrate at posterior margin; tergite IX & X ( Figs. 13 H & 14 D ) posterior margin truncate, but with a shallow emargination. Aedeagus ( Figs. 13 E & 14 A ) almost violin-shaped, very acutely pointed at apex; apical sclerotized area subtriangular. Endophallus with median bands relatively short, each band strongly sclerotized along lateral rim, weakly turning posterolaterally at apical part; expulsion clasps almost X-shaped, strongly sclerotized; copulatory tube very long, attenuate, almost straight, moderately thick at basal part. Parameres slightly longer than median lobe, each slightly broadened in apical part, with 20–24 long apical setae.

Female: sternite VIII ( Figs. 13 I & 14 E ) entire; Gonocoxite ( Figs. 13 J & 14 F ) with serrate apically on posterior margin; tergite IX & X ( Figs. 13 K & 14 G ) is similar to male; spermatheca undetected.

Distribution. China (Yunnan), Thailand.

Remarks. The species belongs to S. cylindricollis group; and it is new to China.

Figures

FIGURE 13. Stenus malickyi Puthz, 2008. A. habitus (dorsal view); B. forebody; C. elytra; D. abdomen; E. aedeagus; F. male sternite VIII; G. male sternite IX; H. male tergite IX & X; I. female sternite VIII; J. female tergite IX & X; K. gonocoxite. Scale bar =0.2 mm.

FIGURE 14. Stenus malickyi Puthz, 2008. A. aedeagus; B. male sternite VIII; C. male sternite IX; D. male tergite IX & X; E. female sternite VIII; F. female tergite IX & X; G. gonocoxite. Scale bar = 0.2 mm.