Anotylus corrugifrons Wang & Zhou, 2020

Wang, Lin-Fei & Zhou, Hong-Zhang, 2020, Taxonomy of Anotylus nitidifrons group (Coleoptera: Staphylinidae: Oxytelinae) and five new species from China, Zootaxa 4861 (1), pp. 23-42 : 28-30

2. Anotylus corrugifrons Wang & Zhou , sp. nov.

(Fig. 2)

Type locality: CHINA, Guangxi, Napo, Baihe .

Type material examined. Holotype: male, CHINA, Guangxi, Napo, Baihe , 400 m, 8. IV. 1998. coll. Haisheng Zhou ( IZ-CAS) ; Paratypes: CHINA: Guangxi: 4 males, 3 females, Napo, Baihe , 400 m, 8. IV. 1998. coll. Haisheng Zhou ( IZ-CAS) ; 3 females, Napo, Baihe , 420 m, 6. IV. 1998. coll. Haisheng Zhou ( IZ-CAS) .

Measurement. BL= 3.40–4.0 mm; FBL= 1.77–1.80 mm; HL= 0.41–0.50 mm; HWE= 0.69–0.82 mm; HWT= 0.61–0.85 mm; EL= 0.19–0.25 mm; TL= 0.17–0.38 mm; ETR= 0.65–1.17; PNL= 0.50–0.52 mm; PNW= 0.69–0.82 mm; PNR = 0.61–0.76; ABDW= 0.79–0.82 mm.

Description. Body yellow-brown, head and elytra dark, shining.

Male: Head (Fig. 2–1C) near rectangular, slightly narrow than pronotum. Disc depressed, smooth and without puncture, convex and deeply furrowed at base, with deep sulcus in middle and depression on each side. Clypeus convex, glabrous, anterior margin slightly curved forward. Epistomal suture with lateral portions running backward to level of anterior margin of eyes. Front of head bordered by fine ridge. Post-ocular furrow marked, reaching base of head. Temples dilated, with big punctures, about 1.5 times as long as eyes. Eyes big. Occipital furrow complete and curved forward. Antenna filiform, articles VI-X with basal ridges.

Pronotum (Fig. 2–1C) trapezoidal, broadest at near 1/2, convex in middle, with little punctures and furrows. Mid-longitudinal sulcus straight and deep, with two shallower and poorly defined paramedial sulci and two paralateral depressions close to lateral margins. Posterior angles well marked. Sides running continuously and weakly constricted at posterior 1/4. Elytra with punctures and longitudinal furrows. Abdomen without puncture.

Sternite VII (Fig. 2–1E) with posterior margin slightly emarginate and carrying long setae laterally, with two small tubercles in middle; Sternite VIII (Fig. 2–1F) with posterior margin broadly bi-emariginate and carrying long setae laterally, obtused angulate in middle, slightly beyond lateral angles posteriorly.

Aedeagus (Figs 2–1H–J, 2–2A–C) oval, inflated at base and shortly narrowing to apex; apical orifice large and ventral orifice crescentic. Parameres (Figs 2–1K, 2–2I) arm-like, closely situated, broad and flat at apex 1/2 carrying two rows of setae; with large seta at middle of ventral edge on each piece.

Female. Head (Fig. 2–1D) narrower than pronotum (Fig. 2–1D), with big punctures. Temples not dilated, about 0.7 times as long as eyes. Sternite VII (Fig. 2–2G) with posterior margin almost straight and unmodified. Sternite VIII (Figs 2–2H) with posterior margin produced, broadly and obtusely triangular. Spermatheca (Figs 2–1L, 2–2J) with base bulb-like, with apical part clavate and slightly curved.

Distribution: China (Guangxi).

Etymology. The specific epithet derived from two Latin words, corrugis and frons, to indicate the wrinkled front of the head.

Differential diagnosis. This new species can be distinguished by the following characters: head glabrous, post-ocular furrow reach to base; pronotum with posterior angles well marked; paramere broad and flat at apex 1/2 carrying two rows of setae; structure and relative position of internal sac selerites (Fig. 2–2C–D).