Sathytes shihongliangi, Shen & Yin, 2019

Shen, Qi & Yin, Zi-Wei, 2019, Four new species of Sathytes Westwood (Coleoptera: Staphylinidae: Pselaphinae) from the island of Borneo, Zootaxa 4629 (2), pp. 188-194 : 192-193

Sathytes shihongliangi sp. nov.

( Fig. 4 )

Type material. Holotype: EAST MALAYSIA: ♂, ‘ Borneo: Sabah, Keningau District, Jungle Girl Camp , N5.4430, E116.4512, 1182 m, Shi H.L., Liu Y. lgt., light trap, Ins. Zoo., CAS. 2016. IV.27 ’ ( IZCAS) . Paratypes: EAST MA- LAYSIA: 2 ♂♂, same label data as holotype, except for ‘2016. IV.26 ’ ( IZCAS, SNUC).

Diagnostic description. Male. Body ( Fig. 4A ) dark reddish-brown, mouthparts and legs paler. Body length 2.35–2.54 mm. Head slightly wider than long, length from anterior margin of clypeus to base 0.48–0.49 mm, width across eyes 0.52–0.53 mm. Each eye composed of about 30 facets. Length of eyes (0.24 mm) / length tempora (0.09 mm) approximately 2.7:1. Length of antennae 1.22–1.29 mm; club ( Fig. 4B ) formed by antennomeres 9–11; antennomere 9 ( Fig. 4C ) sub-quadrate, semi-membranous apophysis at basal third on mesal surface; antennomere 10 transverse, obconical; antennomere ( Fig. 4B, 4D ) approximately 1.8 times as long as wide, with one distinct subbasal projection. Pronotum about as long as broad, length along midline 0.52–0.56 mm, maximum width 0.51–0.53 mm. Elytra transverse, length along suture 0.81–0.83 mm, maximum width 1.00 mm. Abdomen widest at tergite 1 ( IV), and narrowing apically; mid-length of dorsally exposed part 0.58–0.66 mm, maximum width 0.86-0.87 mm. Length of aedeagus ( Fig. 4E ) 0.22 mm; median lobe almost symmetric, slightly narrowing from base toward apex.

Female. Unknown.

Comparative notes. Sathytes shihongliangi is morphologically very similar to S. punctiger Westwood from Sarawak, and may be separated from it only by the relatively more elongate antennomeres 9 and 11, and the aedeagal form, as well as the more basal position of the apophysis of antennomere 9.

Distribution. East Malaysia: Sabah.

Etymology. The new species is named after Hong-Liang Shi, who was one of the collectors of the new species.

Figures

FIGURE 4. Sathytes shihongliangi, male. A. Dorsal habitus. B. Antennal club. C. Antennomere 9. D. Modification of antennomere 11, enlarged. E. Aedeagus, ventral. Scale bars: 0.5 mm in A; 0.2 mm in B; 0.1 mm in C, E; 0.02 mm in D.