Sathytes maoershanus, 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 : 50-51

Sathytes maoershanus sp. nov.

urn:lsid:zoobank.org:act:6BDDF95B-909A-466C-BD0E-95F78C7FE400

Fig. 8

Differential diagnosis

The male of the new species shares with S. larinus Yin & Li, 2012 from Zhejiang and Fujian a similar form of the antennal modification, but can be clearly separated by the slightly more transverse pronotum and much larger body size (2.96–3.07 vs 2.17 mm).

Etymology

The new species is named after Maoershan Nature Reserve, where the type locality of this species is situated.

Type material (27 specimens)

Holotype

CHINA • ♂; Guangxi, Xing’an County, Maoer shan; 25°52′27″ N, 110°24′44″ E; alt. 1940 m; 29 Jul. 2014; Peng, Song, Yu and Yan leg.; beech forest, mixed leaf litter, humus, sifted; SNUC.

Paratypes

CHINA • 5 ♂♂, 7 ♀♀; same collection data as for holotype; SNUC • 2 ♂♂, 4 ♀♀; same collection data as for holotype; 25°52′31″ N, 110°24′54″ E; alt. 1950–2000 m; 23 Jul. 2012; Hu and Song leg.; mixed litter, sifted; SNUC • 3 ♂♂, 3 ♀♀; same collection data as for holotype; 25°53′20″ N, 110°25′53″ E; alt. 2000–2100 m; 22 Jul. 2012; Hu and Song leg.; mixed litter, sifted; SNUC • 2 ♀♀; same collection data as for holotype; 25°54′52″ N, 110°27′14″ E; alt. 1550–1750 m; 24 Jul. 2012; Hu and Song leg.; mixed litter, sifted; SNUC .

Description

Male

MEASUREMENTS. AeL = 0.32 mm; AnL = 1.39–1.52 mm; AL = 0.77–0.81 mm; AW = 0.90–0.95 mm; TBL = 2.96–3.07 mm; EL = 0.95–0.98 mm; EW = 1.09–1.11 mm; HL = 0.61–0.62 mm; HW = 0.59– 0.60 mm; LE = 0.18 mm; LT = 0.19 mm; PL = 0.63–0.66 mm; PW = 0.60–0.62 mm.

Body ( Fig. 8A ) reddish-brown, mouthparts and tarsi paler. Head approximately as long as wide. Each eye composed of about 20 facets; LE:LT = 0.9. Antennal clubs ( Fig. 8B ) formed by antennomeres 9–11; antennomere 9 ( Fig. 8C ) each with semi-membranous apophysis at middle of mesal surface; antennomere 10 strongly transverse, obconical; antennomere 11 ( Fig. 8B ) about 1.7 times as long as wide, each with large apically truncate protuberance bearing tuft of long apical setae at base ( Fig. 8D ). Pronotum slightly longer than broad. Elytra transverse. Abdomen widest at tergite 1 (IV) and narrowing apically. Aedeagus ( Fig. 8E ) slightly constricted near middle, almost symmetrical.

Female

MEASUREMENTS.AnL= 1.26–1.29 mm; AL = 0.86–0.94 mm; AW = 1.05–1.08 mm; TBL = 3.01–3.14 mm; EL = 0.87–0.89 mm; EW = 1.11–1.12 mm; HL = 0.61–0.63 mm; HW = 0.59–0.60 mm; LE = 0.17 mm; LT = 0.19 mm; PL = 0.67–0.68 mm; PW = 0.64–0.66 mm.

Similar to male in size. Each eye composed of about 12 facets; LE:LT = 0.9. Antennal clubs lacking modifications.

Distribution

China: Guangxi.

Figures

Fig. 8. Sathytes maoershanus 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.