Sathytes tangliangi 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 : 850

Sathytes tangliangi Yin and Li , sp. nov.

( Figures 2B , 3K , 5E , 7K , 8K )

Type material

Holotype. Male, labelled ‘ CHINA: Yunnan Prov. / Gongshan County / Qiqi , alt. 1900 m / 2 July 2010 / Liang TANG leg .’; Paratype: 1 female, same label data as holotype type .

Description

Male. Body ( Figure 2B ) yellowish reddish brown, mouthparts and tarsi lighter; BL 2.80. Head ( Figure 3K ) longer than wide, HL 0.55, HW 0.51. Vertexal foveae indistinct, anterior edge of foveae located slightly anterior to level of posterior margin of eyes; LE: LP = 1.16: 1. Eyes moderately developed, prominent, each comprises about 20 facets. Antennae with scapes thick and large; pedicels larger than antennomeres III, III–V subequal in width, VI–VIII subequal in width, slightly narrower than V, IX–XI ( Figure 5E ) strongly clubbed; semi-membranous apophysis on antennomere IX as in Figure 7K ; antennomere X slightly wider than long; XI with single truncate basal protuberance sparsely covered with long apical setae.

Pronotum longer than wide, PL 0.63, PW 0.58. Elytra combined wider than long, EL 0.86, EW 1.02. Abdomen wider than long, AL 0.76, AW 0.89; tergite IV 3.4 times as long as next. Length of aedeagus ( Figure 8K ) 0.17.

Female. Similar to male in size: BL 2.91, HL 0.56, HW 0.52, PL 0.62, PW 0.59. Elytra combined wider than long, EL 0.77, EW 0.98, AL 0.89, AW 0.96. Eyes each comprises about 12 facets.

Habitat and distribution

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

Etymology

The species name is dedicated to Liang Tang, in recognition of his efforts in collecting the type material.

Remarks

The new species and S. montanus are smaller species within the group of species near S. grandis (see remarks under S. magnus ), with body size ranging from 2.55 to 2.80 mm. They can be readily separated by the larger body size, the apophysis of antennomere IX located in posterior half, the basal protuberance of antennomere XI abruptly truncate apically, and aedeagus less rounded in S. tangliangi .

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 5. Antennomeres VIII–XI of Sathytes spp. (A) Sathytes paulus; (B) Sathytes perpusillus; (C) Sathytes rarus; (D) Sathytes sichuanicus; (E) Sathytes tangliangi; (F) Sathytes tibialis. 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.