Sathytes tianquanus, Yin & Shen, 2020

Sathytes tianquanus View in CoL sp. nov.

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Fig. 12 View Fig

Differential diagnosis

The male of S. tianquanus sp. nov. is morphologically close to that of S. obliquus Shen & Yin, 2020 ( Zhejiang) and S. longitrabis ( Shaanxi) in the apophysis of antennomere 9 located at anterior half of the segment. It differs from S. obliquus by the much more transverse antennomere 9; and from S. longitrabis

by the larger body size ( 2.92 mm vs 2.21–2.42 mm), more elongate antennomere 11 and more transverse antennomere 9.

Etymology

The new species is named after Tianquan County, where the type locality of this species is situated.

Type material ( 5 specimens)

Holotype

CHINA • ♂; Sichuan, Tianquan ( XAEn), Er’lang Shan ( ĹḇƜ); 29°52′23″ N, 102°48′34″ E; alt. 2200–2300 m; 13 Jul. 2012; Z. Peng and Z.-W. Yin leg.; old pass; leaf litter, sifted; SNUC.

GoogleMaps

Paratypes

CHINA • 4 ♀♀; same collection data as for holotype; SNUC GoogleMaps .

Description

Male

MEASUREMENTS. AeL = 0.32 mm; AnL = 1.34 mm; AL = 0.79 mm; AW = 0.92 mm; TBL = 2.92 mm; EL = 0.89 mm; EW = 1.07 mm; HL = 0.61 mm; HW = 0.58 mm; LE = 0.19 mm; LT = 0.18 mm; PL = 0.63 mm; PW = 0.63 mm.

Body ( Fig. 12A View Fig ) reddish-brown, mouthparts and tarsi paler. Head slightly longer than wide. Each eye composed of about 22 facets; LE:LT = 1.1. Antennal clubs ( Fig. 12B View Fig ) formed by antennomeres 9–11; antennomere 9 ( Fig. 12C View Fig ) broadest at apical ¼, each with semi-membranous apophysis at apex of mesal expansion; antennomere 10 strongly transverse, obconical; antennomere 11 ( Fig. 12B View Fig ) about 1.6 times as long as wide, each with large basal protuberance bearing tuft of long apical setae at apex ( Fig. 12D View Fig ). Pronotum about as long as wide. Elytra moderately transverse. Abdomen widest at tergite 1 (IV) and narrowing apically. Aedeagus ( Fig. 12E View Fig ) slightly asymmetrical at apex.

Female

MEASUREMENTS.AnL= 1.20–1.21 mm; AL = 0.90–0.91 mm; AW = 0.89–0.90 mm; TBL = 2.81–2.85 mm; EL = 0.74–0.75 mm; EW = 0.96–0.97 mm; HL = 0.57–0.58 mm; HW = 0.53–0.54 mm; LE = 0.15 mm; LT = 0.16 mm; PL = 0.60–0.61 mm; PW = 0.60–0.61 mm.

Slightly smaller than male in size. Each eye composed of about 16 facets; LE: LT = 0.9. Antennal clubs lacking modifications.

Distribution

China: Sichuan.