Sathytes nujiangensis, 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 : 51-53

Sathytes nujiangensis sp. nov.

urn:lsid:zoobank.org:act:2E5BC920-834F-42DC-9FB4-99550406183F

Fig. 9

Differential diagnosis

The male of S. nujiangensis sp. nov. is morphologically similar to that of S. transversus sp. nov. ( China: Xizang), S. valentulus sp. nov. ( China: Guangxi) and S. usitatus Yin & Li, 2012 ( China: Yunnan) in the presence of a single basal protuberance of antennomere 11, and the markedly transverse antennomere 9 (when widths are fully visible). It can be separated from S. transversus sp. nov. by the much smaller body size (2.17 mm vs 2.61–2.72 mm) and less protuberant mesal margin of antennomere 9; from S. valentulus sp. nov. by the thinner antennomere 11 each with a relatively longer basal protuberance, and more transverse antennomere 9; and from S. usitatus by the more oblique anterior margin of antennomere 9 and the more medial positions of the apophyses on these antennomeres.

Etymology

The new species is named after Nu Jiang, where the type locality of this species is situated.

Type material (1 specimen)

Holotype

CHINA • ♂; Yunnan, Gongshan Dulong Nu Autonomous Co. (ĤƜẘAERȃRoḿn), Qiutan Vil. (DZḀLj), Langwang Temple (ÑḢử); 28°04′24.60″ N, 98°34′45.73″ E; alt. 1510 m; 28 Jul. 2015; Wen-Xuan Bi leg.; SNUC.

Description

Male

MEASUREMENTS. AeL = 0.24 mm; AnL = 1.12 mm; AL = 0.53 mm; AW = 0.67 mm; TBL = 2.17 mm; EL = 0.65 mm; EW = 0.77 mm; HL = 0.48 mm; HW = 0.46 mm; LE = 0.16 mm; LT = 0.13 mm; PL = 0.51 mm; PW = 0.49 mm.

Body ( Fig. 9A ) reddish-brown, mouthparts and tarsi paler. Head slightly longer than wide. Each eye composed of about 20 facets; LE:LT = 1.2. Antennal clubs ( Fig. 9B ) formed by antennomeres 9–11; antennomere 9 ( Fig. 9C ) strongly transverse, broadest at apical ¼, each with semi-membranous apophysis at apex of expansion, and at approximately apical ¼ of mesal margin; antennomere 10 strongly transverse, obconical; antennomere 11 ( Fig. 9B ) about 1.5 times as long as wide, each with single apically truncate basal protuberance bearing tuft of long setae at the apex. ( Fig. 9D ). Pronotum slightly longer than broad. Elytra moderately transverse. Abdomen widest at tergite 1 (IV) and narrowing apically. Aedeagus ( Fig. 9E ) slightly elongate, slightly constricted at middle and almost symmetrical.

Female

Unknown.

Distribution

China: Yunnan.

Figures

Fig. 9. Sathytes nujiangensis 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.