Sathytes chengzhifeii, 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 : 44-45

Sathytes chengzhifeii sp. nov.

urn:lsid:zoobank.org:act:3DA68CF9-8416-4B33-A31B-C583A45AEC52

Fig. 4

Differential diagnosis

The male of S. chengzhifeii sp. nov. is most similar to that of S. huapingensis sp. nov. from Guangxi, China and S. larifuga Shen & Yin, 2019 from Sabah, Borneo, with which it shares the unique, subtriangular basal protuberance of antennomere 11. The new species can be separated from the former by the larger body size (2.69–2.81 mm vs 2.49 mm) and the more basal and more distal positions of the protuberance and apophysis of antennomeres 11 and 9, respectively; and from the latter by the relatively much smaller eyes in relation to the head, more elongate antennomeres 9 and 11, and more distal position of the apophysis of antennomere 9.

Etymology

The new species is named after Zhi-Fei Cheng, one of the collectors of the new species.

Type material (5 specimens)

Holotype

CHINA • ♂; Yunnan, Dehongmang (ṞẌĖm), Yingjiang County (Ŋữn), Tongbiguan Town (Ŕae ẅđ); 24°36′38.78″ N, 97°39′49.35″ E; alt. 1382 m; 18 Jul. 2019; Chen and Shen. leg.; mixed leaf litter, sifted; SNUC.

Paratypes

CHINA • 1 ♂, 2 ♀♀; same collection data as for holotype; SNUC • 1 ♂; same collection data as for holotype; near Mangna Road (Ėďŵǿ); 24°36′59.75″ N, 97°44′30.89″ E; alt. 1550 m, 29 Jul. 2019; SNUC .

Description

Male

MEASUREMENTS. AeL = 0.25 mm; AnL = 1.25–1.29 mm; AL = 0.73–0.78 mm; AW = 0.86–0.89 mm; TBL = 2.69–2.81 mm; EL = 0.81–0.84 mm; EW = 0.98–1.02 mm; HL = 0.57–0.59 mm; HW = 0.55– 0.57 mm; LE = 0.21 mm; LT = 0.11 mm; PL = 0.58–0.60 mm; PW = 0.57–0.58 mm.

Body ( Fig. 4A ) reddish-brown, mouthparts and tarsi paler. Head approximately as long as wide. Each eye composed of about 20 facets; LE: LT = 1.9. Antennal clubs ( Fig. 4B ) formed by antennomeres 9–11; antennomere 9 ( Fig. 4C ) slightly elongate, each with long semi-membranous apophysis at basal ¼ of mesal margin; antennomere 10 strongly transverse, obconical; antennomere 11 ( Fig. 4B ) about 1.8 times as long as wide, each with single subtriangular and blunt basal protuberance covered with short tuft of setae at apex ( Fig. 4D ). Pronotum about as long as wide. Elytra strongly transverse. Abdomen widest at tergite 1 (IV) and narrowing apically. Aedeagus ( Fig. 4E ) flattened, slightly elongate, and slightly asymmetrical at apex.

Female

MEASUREMENTS. AnL = 1.27 mm; AL = 0.86 mm; AW = 0.95 mm; TBL = 3.0 mm; EL = 0.83 mm; EW = 1.05 mm; HL = 0.62 mm; HW = 0.60 mm; LE = 0.17 mm; LT = 0.16 mm; PL = 0.69 mm; PW = 0.65 mm.

Similar to male in size. Each eye composed of about 14 facets; LE:LT = 1.6. Antennal clubs lacking modifications.

Distribution

China: Yunnan.

Figures

Fig. 4. Sathytes chengzhifeii 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.