Anchocerus wenxuani Lin & Hu, 2021

Lin, Xiao-Bin & Hu, Jia-Yao, 2021, New species and records of Anchocerus Fauvel in China (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 5032 (2), pp. 290-294 : 291-293

Anchocerus wenxuani Lin & Hu , sp. n.

( Figs. 1–11 )

Type material. Holotype: CHINA: male, ‘China: Guangxi Prov., Xing’an County, Maoer Mt., nr. Hongjunting , 25°54’15.28’’N, 110°28’03.66’’E, 1400–1500 m, 7.v.2021, Yin, Zhang, Pan & Shen leg.’ ( SNUC) . Paratypes: CHINA: 2 females, same data as holotype ; 1 female, same data, except ‘ 25°54’05.08’’N, 110°28’13.51’’E, 1360 m’ ; 1 male, same data, except ‘ Jiuniutang , 25°58’24’’N, 110°21’32’’E, 1150 m, 31.vii.2014, X.-B. Song & Z. Peng leg. ’; 1 female, same data, except ‘ 25°53’7’’N, 110°29’14’’E, beech forest, mixed leaf litter, humus, sifted, 1143 m, 31.vii.2014, Peng, Song, Yu & Yan leg. ’; 1 male, same data, except ‘ Jinxiu County, Dayao Mt. , 7 km, 24°09’07’’N, 110°12’29’’E, 1300 m, 16.vii.2014, Peng, Song, Yu & Yan leg.’ ( SNUC) .

Description. BL: 10.9–13.5 mm, FL: 4.7–5.1 mm.

Body ( Fig. 1 ) dark brown; mouth parts, tarsus and apical margin of abdominal tergites reddish brown.

Head ( Figs 2, 3 ) shorter than wide (HL/HW=0.85–0.87), slightly dilated behind eyes. Temples 1.66–1.77 times as long as eyes. Dorsal macrosetae (one side only): one near antennal base; one medially between eyes; one postero-medially, closer to neck constriction than to posterior margin of eye; one medially near neck constriction; two laterally on temple, of which one near posterior margin of eye, one near neck constriction. Surface with dense and fine non-setiferous punctation, lacking microsculpture. Antennae with segment 1 about as long as three following segments combined, segment 2 distinctly longer than segment 3, segments 4–8 longer than wide, becoming vaguely shorter, segment 9 about as long as wide, segment 10 slightly wider than long, last segment short, about as long as wide.

Pronotum ( Figs 2, 3 ) shorter than wide (PL/PW=0.83–0.88), longer (PL/HL=1.33–1.41) and wider (PW/ HW=1.36–1.40) than head; with punctation slightly finer than those on head, lacking microsculpture. Dorsal macrosetae (one side only): One medial and two lateral.

Elytra ( Figs 2, 3 ) with dense and coarse punctation and brown setae, lacking microsculpture, shorter than wide (EL/EW=0.79–0.84), slightly longer (EL/PL=1.00–1.05) and wider (EW/PW=1.06–1.10) than pronotum. Wings well developed. Scutellum with punctation and setae similar to those on elytra.

Abdomen ( Fig. 1 ) with coarse punctation except for median part of tergite II; tergite VII with whitish apical seam; all tergites with dense and very fine transverse microsculpture.

Legs densely covered with brown setae, all tibiae with lateral spines.

Male. Sternite IX ( Fig. 4 ) long and slender, with numerous long setae at apical portion; tergite X ( Fig. 5 ) gradually narrowing apically, with several long setae situated at apical and lateral margins. Aedeagus ( Figs 6–9 ): median lobe slightly constricted near middle, with wide apex in ventral view; paramere ( Figs 8, 9 ) gradually narrowed apicad, distinctly shorter than median lobe, with bunch of three or four apical setae and numerous closely set sensory peg setae, forming a continuous transverse group.

Female. Tergite X ( Fig. 10 ) with several long setae situated at apical and lateral margins.

Distribution. The species is known from Guangxi, southern China.

Remarks. The new species is very similar to A. shibatai Smetana, 1995 , but can be separated by the slightly truncate apex of median lobe of aedeagus in ventral view (in A. shibatai , with round apex), and by the sensory peg setae of paramere forming a continuous transverse group (in A. shibatai , forming two separate groups).

Etymology. The species is named in honor of Wen-Xuan Zhang, who collected some of the type specimens.

Figures

FIGURES 1–3. A. wenxuani 1. habitus; 2. forebody in dorsal view; 3. forebody in sublateral view. Scale bars: 1 mm

FIGURES 4–10. A. wenxuani (4–8, 10: specimen from Maoer Mt., 9: specimen from Dayao Mt.) 4—male sternite IX; 5—male tergite X; 6—aedeagus, in ventral view; 7—aedeagus, in lateral view; 8, 9—paramere in ventral view; 10—female tergite X. Scale bars: 4–7 = 0.5 mm, 8, 9 = 0.2 mm.

FIGURE 11. Map showing the distribution of Anchocerus in China A—A. shibatai; B—A. schuelkei; C—A. giganteus; D—A. smetanai; E—A. pengzhongi; F—A. yunnanensis; G—A. yini; H—A. wenxuani.