Megalinus hunanensis Bordoni, 2013

Megalinus hunanensis Bordoni, 2013 View in CoL

(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 GoogleMaps .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.