Hybos inthanonensis PLANT 2013, sp. nov.

Hybos inthanonensis sp. nov.

(Figs 59–67, 228, 229, 253, 291)

Type material. HOLOTYPE ♂: THAILAND, Chiang Mai Province, Doi Inthanon National Park, Summit forest, 18°35.361'N, 98°29.157'E, 2500 m, 29.iv–6.v.2007, Malaise trap, Y. Areeluck, [T1856] (QSBG). PARATYPES: 1♂, 1♀, same data as holotype, 15–22.iv.2007, 29.iv.-6.v.2007; 3♂, 10♀, Summit marsh, 18°35.361'N, 98°29.157'E, 2500 m, 15–22.iv.2007, 22–29.iv.2007, 29.iv.-6.v.2007, 1–8.v.2007, 8–15.v.2007; 3♂. 1♀, Kew Maepan Trail, 18°33.162'N, 98°28.81'E, 2200 m, 15–22.iv.2007, 22–29.iv.2007, 8–15.v.2007 (QSBG and NMWC).

Additional material. 1♂, same data as holotype, 8–15.v.2007; 1♀, 18–19.iv.2007, pan trap (NMWC).

Etymology. Named after the type locality, Doi Inthanon.

Diagnosis. A black legged species with entirely pale setae on coxae and stylus micropilose on basal 0.8. The mid tibia has 1 dorsal and 1 ventral seta very long; the hind femur is slightly inflated in the male and slightly less so in the female. Distinguished from Hybos phahompokensis sp. nov., H. zhejiangensis Yang & Yang and H. shamshevi sp. nov. primarily by differences of male and female terminalia.

Description. Body length 4.0– 4.5 mm. Almost identical with Hybos phahompokensis sp. nov. in both sexes but with different terminalia. Male terminalia (Figs 59–65). Left surstylus (Figs 62–64) with inwardly curved, broad, distally flattened (but pointed in some views) dorsal process at the base of which is a short bulbous swelling. Right surstylus (Fig. 65) moderately long, slightly incurved, bluntly pointed; without internally directed pointed triangular process basally. Hypandrium (Fig. 60) rather elongate, narrowing apically with small elongate black triangular subapical processes; extreme apex strongly bent inwardly with minute, sharp, beak-like, apical process (Fig. 61). Female terminalia (Figs 66, 67). Tergite 8 with posterior margin deeply and smoothly concave. Sternite 8 elongate, 4 pairs of stout yellowish bristles directed downwards; short blunt process posteroventrally bearing numerous short, stout setae. Tergite 10 and sternite 10 very weakly sclerotized.

Comment. Hybos inthanonensis sp. nov. is very similar to H. zhejiangensis Yang & Yang, 1995, H. shamshevi sp. nov. and especially H. phahompokensis sp. nov. from which it can only be distinguished by morphology of the terminalia. Although the male terminalia exhibit remarkable similarities to those of H. phahompokensis sp. nov. the female terminalia have a very distinctive pv process on sternite 8. Hybos inthanonensis sp. nov. is recorded only from moist hill evergreen forest above 2,200 m on the mountain Doi Inthanon (Thanon Thongchai Range), northern Thailand (Fig. 253). Adults have been recorded in April and May (Fig. 291) corresponding with the start of the wet season.