Sathytes rarus 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 : 848-849

Sathytes rarus Yin and Li , sp. nov.

( Figures 3I , 5C , 6G , 7I , 8I )

Type material

Holotype. Male, labelled ‘ CHINA: Yunnan Prov. / Gongshan County / Qiqi , alt. 1980 m / Jian-Qing ZHU leg.’.

Description

Male. Body reddish brown, mouthparts and tarsi lighter; BL 1.54. Head ( Figure 3I ) wider than long, HL 0.30, HW 0.37. Vertexal foveae indistinct, posterior edge of foveae located slightly anterior to level of posterior margin of eyes; LE: LP = 1.86: 1. Eyes well-developed, prominent, each comprises about 20 facets. Antennae with scapes thick and large; pedicels larger than antennomeres III, III–IV subequal in width, V–VI subequal in width, slightly wider than IV, VII–VIII subequal in width, slightly wider than VI, IX–XI ( Figure 5C ) strongly clubbed; semi-membranous apophysis on antennomere IX as in Figure 7I ; antennomere X much wider than long, XI ( Figure 6G ) with two truncate basal protuberances, the more basal one covered with tufts of specialized apical setae.

Pronotum as long as wide, PL 0.37, PW 0.37. Elytra combined wider than long, EL 0.45, EW 0.60. Abdomen wider than long, AL 0.42, AW 0.55; tergite IV 2.3 times as long as next. Length of aedeagus ( Figure 8I ) 0.15.

Female. Unknown.

Habitat and distribution

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

Etymology

The specific name indicates that the new species is uncommon.

Remarks

The new species is placed near a number of species centred on S. rufus (see remarks under S. longwangshanus and S. paulus ). Sathytes rarus can be readily separated by the antennomere IX with distinctive long apophysis located anterior to the middle.

Figures

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 6. Details of Sathytes spp. (A–C) antennomeres VIII–XI; (D–J) antennomere IX, enlarged; (A) Sathytes usitatus; (B) Sathytes wuyishanus; (C) Sathytes yunnanicus; (D) Sathytes cristatus; (E) Sathytes paulus; (F) Sathytes perpusillus; (G) Sathytes rarus; (H) Sathytes tibialis; (I) Sathytes wuyishanus; (J) Sathytes yunnanicus. Scale bars: A–C 0.2 mm; D–J 0.05 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.