Dictyotenguna choui Song & Liang, 2012

For the relationship and diagnosis of Dictyotenguna see in Song and Liang (2012).

Oriental region.

CHINA: 1 ♂, Sichuan, Guangyuan, Micangshan, 21 August 2007, coll. Yubo Zhang. 1 ♂, Sichuan, Mianyang, Qianfoshan, 840 m, 13 August 2007, coll. Yubo Zhang.

China (Fujian, Guangxi and Sichuan).

♂, BL: 14.6 mm HL: 1.8 mm HW: 1.7 mm FWL: 11.5 mm. ♀, BL: 17.3 mm HL: 2.0 HW: 1.8 mm FWL: 14.1 mm.

Body green. Carinae and veins of wings dark green. Frons between lateral intermediate carinae orange red. Rostrum blackish at extreme apex. Femora with a black marking at apex.

Head (Figs 1, 2, 6) relatively short, shorter than pronotum and mesonotum combined, the ratio of length about 0.6:1. Vertex (Figs 1, 2, 4, 6, 8) relatively narrow, two times as wide as long between eyes, media carina conspicuous and strongly, lateral margins carinate sub-parallel at base, slightly sinuate in front of eyes, then gradually narrowing to arrowhead at apex. Frons (Figs 3, 7) nearly rectangle, length 2.5 times long than wide, lateral carinae reaching to the back of eyes. Pronotum (Figs 1–2, 6) distinctly shorter than mesonotum medially, with ratio about 0.2:1, disc broad with median carina distinct, lateral carina very faint. Mesonotum (Figs 1–2, 6) with median longitudinal carina diatinct, not reach to the apex, lateral carinae curverging at the front. Forewings (Figs 5, 9) with Sc+R, M and Cu all branched apically, stigma distinct, with 4 cells. Legs moderately elongate.

Male genitalia. Pygofer (Figs 11–13) with a large process on posterior margin, and the process with lots of setae; anterior margin relatively straight. Anal tube (Figs 11, 13) large and broad, apex U-shaped in dorsal view. Parameres (Figs 11, 12) large in lateral view, posterior margin with a dorsally directed black-tipped process, and with a ventrally directed process near sub-middle on outer upper edge. Aedeagus (Fig. 14) with a pair of processes extended dorsally. Phallobase (Figs 14–16) basally sclerotized and pigmented, with apical membranous lobes: dorsal apical lobes slender and connected (Fig. 15); ventral lobes composed of two parts: one pairs large on apex, the other one small and the base produced near middle part (Fig. 16).

Female genitalia. Anal tube (Fig. 18) round and large in dorsal view, with ratio of length to width at middle about 1:1. First valvulae (Fig. 19) sclerotized with 6 teeth of different sized in lateral view; second valvulae (Fig. 20) triangular, symmetrical in ventral view, connected at base and separated from 1/4 base; third valvulae (Fig. 21) with 2 sclerotized lobes, lateral lobe with 5 long spines at apex, and one of the five separate from others.

Holotype ♂, China: Guangxi, Huaping, 900 m, 31 July 2007, coll. Pei Zhang. Paratype, 1 ♀, same data as holotype.

This new species is derived from the Greek word “angusta”, indicating that the apical lobes of phallobase slender.

China (Guangxi).

This species is similar to Dictyotenguna choui Song & Liang, but can be distinguished from the latter by aedeagus with a pair of processes extended anteriorly (Fig. 15) in dorsal view (processes extended to left and right sides in D.Choui), and pygofer with anterior margin quite straight(Fig. 11) in later view(anterior margin angular in D.Choui).