Psychomyia shuni Peng & Sun sp. nov.

Fig. 1A-D

Type materials.

Holotype: China • 1♂; Hunan Province, Shaoyang City, Xinning County, Shunhuangshan National Forest Park; 26°23.78'N, 111°00.47'E; alt. 750 m; 22-viii-2020; light trap; W. Cao leg.; NJAU Tricho-20200822-0001. Paratypes: China • 1♂; same data as holotype; NJAU Tricho-20200822-0002 • 1♂; Hunan Province, Shaoyang City, Chengbu County, Yaorenping hydropower station; 26°14.95'N, 110°30.26'E; alt. 900 m; 24-v-2021; light trap; L. Peng leg.; NJAU Tricho-20210524-0001.

Diagnosis.

This species is unique among Psychomyia in that the coxopodites and the harpagones are completely fused and together form an S or Z shape in ventral view.

Description.

Male. Length of each forewing 3.6-3.8 mm (n = 3); holotype 3.7 mm. Specimens in alcohol with compound eyes black; body brown dorsally and light yellow ventrally. Forewings with forks II-V present, hind wings with forks II, III, and V present. Genitalia. Sternum IX nearly trapezoidal with anterior margin concave in ventral view (Fig. 1A); rounded, semicircular in lateral view (Fig. 1C). Tergite IX produced from dorsoposterior margin of sternum IX, membranous, somewhat bowl-shaped with apical margin sinuate and partially hidden under two superior appendages in dorsal view (Fig. 1B), tongue-shaped in lateral view (Fig. 1C). Superior appendages in dorsal view wide and long, each with larger mesobasal lobe and smaller subapical lobe both directed mesad and with apex truncate (Fig. 1B), twisted and clavate, each with inner side having cluster of spines subapically in ventral view (Fig. 1D); subrectangular in lateral view, each with blunt basodorsal process, angled posterodorsad at 2/3 length to truncate apex (Fig. 1C). Phallobase slender, basally directed anterad and evenly recurved posterad in lateral view (Fig. 1C). Phallotheca tubular, basally directed anterad, evenly recurved dorsad, caudad at midlength, and posteroventrad distally; apically depressed and trifurcate, acute mesally and with pair of long, subapical processes projecting caudad, then recurved dorsad and diverging anterolaterad (Fig. 1A-C). Inferior appendages in ventral view sigmoid (Fig. 1A), in lateral view strongly C-shaped (Fig. 1C); coxopodites elongate-rectangular in lateral view, heavily setose, and fused with slender harpago (Fig. 1C).

Etymology.

Latin noun in genitive singular. The new species is named after Shun, a leader of tribal alliances in ancient China, who is considered an important founder of the Chinese civilization. Moreover, the holotype and one of the paratypes were collected at Mt Shun-huang, the mountain named after Shun.

Distribution.

China (Hunan).