Megalinus hunanensis Bordoni, 2013

ZHOU, YU-LINGZI, BORDONI, ARNALDO & ZHOU, HONG-ZHANG, 2013, Taxonomy of the genus Megalinus Mulsant & Rey (Coleoptera: Staphylinidae, Xantholinini) and seven new species from China, Zootaxa 3727 (1), pp. 1-66 : 39-41

Megalinus hunanensis Bordoni, 2013

(Fig. 12A–E; Fig. 12-1A–H)

Bordoni, 2013: 280 ( Megalinus ; Type locality: China, Hunan, Wulingyuashan , 40 km NW Zhanzhajie, 800 m, 22–25.VI.1997) .

Type material: male, with labels as follows: “ PARATYPUS, Megalinus , hunanensis sp. n., BORDONI det. 2013” / “‘ CHINA, Hunan Prov. ’, ‘ Wulingyuanshan , 40km’, NW of Zhanzhajie, 800 m, 22-25.vi.1997 ” ( CB) .

Addtional material: CHINA: Guizhou: one male, one female, Zunyi City: Kuangkuoshui (E 107.18, N 38.29), 746 m, 06. VI .2010, Liu Wangang collected ( IZ-CAS) .

Male. Abdominal segment VIII entirely covered with setiferous punctures, except a narrow medial longitudinal impunctate band; posterior margins of tergite VIII slightly arcuate backwards (Fig.12-1A), that of sternite VIII subtruncated (Fig. 12-1B). Tergite IX symmetrical, connected mediobasally. Sternite IX symmetrical, with acuminate base and broadly emarginated posterior margin (Fig. 12-1C). Tergite X symmetrical, nearly semicircle, base portion narrow and arcuate, posterior margin concaved (Fig. 12-1D), in situ broadly exposed between tergite IX. Median lobe of aedeagus subelliptical and large sized (Fig. 12-1E, F), basal piece without transparent, membranous medial-longitudinal band (Fig. 12D), anterior portion broad, tapered apically, 0.23 mm; basal bulb 1.05 mm long. Parameres symmetrical, short, slightly longer than 1/3 of basal bulb length. Internal sac broad and coiled several times, anterior portion bearing coarser, darker spines; apical portion with paired rows of fine spines; other parts extensively bearing scales and smaller spines (Fig. 12D, E; Fig. 12-1E, F).

Female. Posterior margin of sternite VIII (Fig. 12-1G) slightly sharpened backwards. Genital segment medium sized (Fig. 8-1H), 0.60 mm long, sternite with slightly bisinuate base; supplementary sclerites symmetrical, subtriangular, and medium sized of 0.20 mm long, overlapped most part of basal margin of genital sternite.

Distribution. China (Hunan).

Remarks. This species could be distinguished from its congeners by: 1) elytra brown, except surface along suture and apical 1/5 distinctly paler (Fig. 12C); 2) frontal region wrinkled (Fig. 12A); 3) antennomere II distinctly longer than III; 4) pronotum not distinctly widened anteriad, lateral margins subparalleled, anterior angles not protruding; 5) admedian row of pronotum consisting of 6–7 punctures; lateral row, curvedly arranged, of 5–8 punctures (Fig. 12B); 6) with punctures arranged in 5–6 rows on each elytron; deflexed portion of each elytron with 5–6 rows of punctures; 7) male tergite X semicircle, with narrow, arcuate base, posterior margin distinctly concaved; 8) median lobe slightly tapered apically; 9) internal sac broad and overlapped, spines near apex more darker.

segments, ventral view. Scale bars 0.30 mm.