Sathytes australis, 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 : 41-42

Sathytes australis sp. nov.

urn:lsid:zoobank.org:act:074C636B-E7FE-4032-9E2B-781DB0DDA329

Fig. 2

Differential diagnosis

The male of S. australis sp. nov. shares with S. similis Shen & Yin, 2020 ( China: Zhejiang, Jiangxi) the similar body size and structure of the antennal clubs. These two species can be separated only by the following subtle differences: in S. australis sp. nov., the eyes are slightly larger, the dorsal margin of antennomere 11 is more convex, the upper (subbasal) protuberance of antennomere 11 is smaller, antennomere 9 in full view (when full widths are visible) is slightly more transverse and the apex of the aedeagus is narrower, and by their different distributions.

Etymology

The specific name indicates the distribution of the new species in southern China.

Type material (4 specimens)

Holotype

CHINA • ♂; Guangxi, Guilin City (OEWm), Xing’an County (ĽȐn), Maoer shan ( ṜḤƜ); 25°51′28″ N, 110°29′04″ E; alt. 450–650 m; 25 Jul. 2012; Hu and Song leg.; mixed leaf litter, sifted; SNUC.

Paratypes

CHINA • 1 ♂; same collection data as for holotype; 25°53′15″ N, 110°25′47″ E; alt. 2030 m; 30 Jul. 2014; Peng, Song, Yu and Yan leg.; beech forest, mixed leaf litter, humus, sifted; SNUC • 1 ♂; same collection data as for holotype; Gaozhai (ÁḃLj); 10 Aug. 2006; Jian-Hua Huang leg.; SNUC • 1 ♂; Guangdong Province, Ruyuan Hsien (Ēdzn), Nanling N. R. (wẃon'ẉợṵ), Walkway ; 24°55′57″ N, 113°00′18″ E; alt. 1220 m; 28 Apr. 2015; Peng and Zhou leg.; mixed forest, leaf litter, wood, sifted; SNUC .

Description

Male

MEASUREMENTS. AeL = 0.22 mm; AnL = 0.95–1.08 mm; AL = 0.56–0.60 mm; AW = 0.71–0.74 mm; TBL = 2.07–2.18 mm; EL = 0.67–0.68 mm; EW = 0.78–0.79 mm; HL = 0.37–0.40 mm; HW = 0.46– 0.47 mm; LE = 0.16 mm; LT = 0.09 mm; PL = 0.47–0.50 mm; PW = 0.47–0.49 mm.

Body ( Fig. 2A ) dark reddish-brown, mouthparts and tarsi paler. Head much wider than long. Each eye composed of about 20 facets; LE:LT = 1.8. Antennal clubs ( Fig. 2B ) formed by antennomeres 9–11; antennomere 9 ( Fig. 2C ) slightly transverse, inner margin moderately expanded mesally, with single semi-membranous apophysis at apex of expansion; antennomere 10 strongly transverse, obconical; antennomere 11 ( Fig. 2B ) about 1.8 times as long as wide, each with two basal protuberances, more apical one short, rounded at apex, more basal one covered with two tufts of setae at apex ( Fig. 2D ). Pronotum about as long as wide. Elytra strongly transverse. Abdomen widest at tergite 1 (IV) and narrowing apically. Aedeagus ( Fig. 2E ) slightly asymmetrical at apex.

Female

Unknown.

Distribution

China: Guangdong, Guangxi.

Figures

Fig. 2. Sathytes australis sp. nov., ♂ (population of Maoershan). 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.