Sathytes tianquanus, Yin & Shen, 2020

Yin, Zi-Wei & Shen, Qi, 2020, Fifteen new species of Sathytes Westwood from China (Coleoptera, Staphylinidae, Pselaphinae), with an updated checklist of world species, European Journal of Taxonomy 722, pp. 37-74 : 57-58

Sathytes tianquanus sp. nov.

urn:lsid:zoobank.org:act:3303B110-9BE0-49BE-B87D-6E22C868629F

Fig. 12

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.

Paratypes

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

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 ) 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 ) formed by antennomeres 9–11; antennomere 9 ( Fig. 12C ) broadest at apical ¼, each with semi-membranous apophysis at apex of mesal expansion; antennomere 10 strongly transverse, obconical; antennomere 11 ( Fig. 12B ) about 1.6 times as long as wide, each with large basal protuberance bearing tuft of long apical setae at apex ( Fig. 12D ). Pronotum about as long as wide. Elytra moderately transverse. Abdomen widest at tergite 1 (IV) and narrowing apically. Aedeagus ( Fig. 12E ) 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.

Figures

Fig. 12. Sathytes tianquanus sp. nov., ♂. A. Dorsal habitus. B. Antennal club. C. Antennomere 9. D. Modification of antennomere 11, enlarged. E. Aedeagus, ventral view. Scale bars: A = 0.5 mm; B = 0.2 mm; C, E = 0.1 mm; D = 0.05 mm.