Sathytes magnus Yin and Li, 2012

Yin, Zi-Wei, Li, Li-Zhen & Zhao, Mei-Jun, 2012, Taxonomic study on Sathytes Westwood (Coleoptera: Staphylinidae: Pselaphinae) from China. Part I, Journal of Natural History 46 (13 - 14), pp. 831-857 : 845-846

Sathytes magnus Yin and Li , sp. nov.

( Figures 2A , 3F , 4F , 7F , 8F )

Type material

Holotype. Male, labelled ‘ CHINA: Xizang A. R. / Motuo County / Hanmi / alt. 2200 m / 19 August 2005 / Liang TANG leg .’; Paratype: 1 female, same label data as holotype .

Description

Male. Body ( Figure 2A ) reddish brown, mouthparts and tarsi lighter; BL 3.36. Head ( Figure 3F ) about as long as wide, HL 0.65, HW 0.66. Vertexal foveae moderately developed, anterior edge of foveae located posterior to level of posterior margin of eyes; LE: LP = 1: 1. Eyes well-developed, prominent, each comprises about 25 facets. Antennae with scapes thick and large; pedicels larger than antennomeres III, III–VIII subequal in width, IX–XI ( Figure 4F ) strongly clubbed; semi-membranous apophysis on antennomere IX as in Figure 7F ; antennomere X much wider than long, XI with single blunt basal protuberance densely covered with tuft of long setae at apex.

Pronotum longer than wide, PL 0.75, PW 0.70. Elytra combined slightly wider than long, EL 0.99, EW 1.29. Abdomen slightly wider than long, AL 0.97, AW 1.08; tergite IV 2.4 times as long as next. Length of aedeagus ( Figure 8F ) 0.32.

Female. Similar to male in size: BL 3.61, HL 0.65, HW 0.65, PL 0.76, PW 0.74. Elytra combined wider than long, EL 0.94, EW 1.23, AL 1.26, AW 1.20. Eyes each comprises of about 15 facets.

Habitat and distribution

Sifted from the mixed leaf litter of a broad-leaved forest. Southwest China (Xizang).

Etymology

The specific name refers to the large size of the species.

Remarks

This new species is united with S. montanus , S. grandis and S. tangliangi described below by sharing relatively large size, an elongate head, body densely covered by fine setae and similar structure of male antennomere IX. Sathytes magnus and S. grandis are larger species, no less than 3.00 mm. They may be readily separated by larger size (3.36), antennomere XI being broader, elytra being much wider in contrast to abdomen, and less elongate aedeagus in S. magnus .

Figures

Figure 2. Dorsal habitus of Sathytes spp. (A) Sathytes magnus; (B) Sathytes tangliangi.

Figure 3. Head (left half) of Sathytes spp. (A) Sathytes cristatus; (B) Sathytes excertus; (C) Sathytes larinus; (D) Sathytes longitrabis; (E) Sathytes longwangshanus; (F) Sathytes magnus; (G) Sathytes paulus; (H) Sathytes perpusillus; (I) Sathytes rarus; (J) Sathytes sichuanicus; (K) Sathytes tangliangi; (L) Sathytes tibialis; (M) Sathytes usitatus; (N) Sathytes wuyishanus; (O) Sathytes yunnanicus. Scale bars 0.2 mm.

Figure 4. Antennomeres VIII–XI of Sathytes spp. (A) Sathytes cristatus; (B) Sathytes excertus; (C) Sathytes larinus; (D) Sathytes longitrabis; (E) Sathytes longwangshanus; (F) Sathytes magnus. Scale bars 0.2 mm.

Figure 7. Antennomere IX of Sathytes spp. (A) Sathytes cristatus; (B) Sathytes excertus; (C) Sathytes larinus; (D) Sathytes longitrabis; (E) Sathytes longwangshanus; (F) Sathytes magnus; (G) Sathytes paulus; (H) Sathytes perpusillus; (I) Sathytes rarus; (J) Sathytes sichuanicus; (K) Sathytes tangliangi; (L) Sathytes tibialis; (M) Sathytes usitatus; (N) Sathytes wuyishanus; (O) Sathytes yunnanicus. Scale bars 0.2 mm.

Figure 8. Details of Sathytes spp. (A–O) aedeagus; (P) protibia; (A) Sathytes cristatus; (B) Sathytes excertus; (C) Sathytes larinus; (D) Sathytes longitrabis; (E) Sathytes longwangshanus; (F) Sathytes magnus; (G) Sathytes paulus; (H) Sathytes perpusillus; (I) Sathytes rarus; (J) Sathytes sichuanicus; (K) Sathytes tangliangi; (L, P) Sathytes tibialis; (M) Sathytes usitatus; (N) Sathytes wuyishanus; (O) Sathytes yunnanicus. Scale bars 0.1 mm.