Timandra viminea, Cui, Le, Xue, Dayong & Jiang, Nan, 2019

Cui, Le, Xue, Dayong & Jiang, Nan, 2019, A review of Timandra Duponchel, 1829 from China, with description of seven new species (Lepidoptera, Geometridae), ZooKeys 829, pp. 43-74 : 43

Timandra viminea sp. n. Figs 14, 32, 42, 55, 70

Description.

Head. Antennae bipectinate to five-sixths in male and filiform in female; dorsal surface of shaft pale yellowish-brown, slightly speckled with brown scales. Frons blackish-brown, ventral side yellowish-white and with an obtuse protrusion on ventral margin (Fig. 42). Labial palpi yellowish-brown, not extending beyond frons. Vertex yellowish-white. Thorax. Patagia brown. Tegulae and thorax pale yellowish-brown. Hind tibia with two pairs of spurs in male. Forewing length: male and female 12-13 mm. Apex of forewing acute and outer margin nearly straight; hindwing with rounded apex and outer margin forming a small protrusion on vein M3. Wing colour yellowish-brown with brown spots. Forewing with discal spot blackish-brown, small, angled at middle; medial line reddish-brown, arising from apex; postmedial line grey and narrow, separating from medial line on vein R5; terminal line grey; fringes yellowish-brown, sometimes pinkish-red at apex. Hindwing with medial line reddish-brown and straight; postmedial line grey and narrow, protruding centrally; terminal line and fringes similar to those of forewing. Underside densely covered with brown speckles; postmedial line more distinct than that on upperside.

Male genitalia. Uncus broad at base, digitiform at terminal part. Socii narrow and rod-like, extending slightly beyond tip of uncus; inner margin of tegumen with a pair of acute processes centrally. Costa of valva with a digitiform and curved process centrally; a slender and curved arm present between valvula and sacculus; sacculi asymmetric, terminal part broad and narrow, covered with setae on left side, but narrow and digitiform on right side. Juxta broad near base, tapered towards terminal part. Saccus small and rounded at apex. Aedeagus slender, cornuti composed of two long sclerotized stripes.

Female genitalia. Seventh sternite narrow and sclerotized, slightly concave on posterior margin. Lamella postvaginalis sclerotized. Colliculum narrow. Ductus bursae shorter than corpus bursae, strongly sclerotized on posterior part; signum with a longitudinal sclerite inwards a slightly sclerotized plate, a pouch present on anterior part.

Diagnosis.

The new species can be identified by the combination of the following characters: the frons is blackish-brown with an obtuse protrusion on the ventral margin; in the male genitalia, a long digitiform and curved process is present at the middle of the costa; the sacculi are asymmetric, as the left side is much stouter than the right one; the cornuti are two long sclerotized stripes; the seventh sternite of the female is narrow and sclerotized, and slightly concave on the posterior margin; the posterior half of the ductus bursae is strongly sclerotized.

Type material.

Holotype, ♂, CHINA: Yunnan (IZCAS): Baoshan, Baihualing, 1520 m, 11-13.VIII.2007, coll. Xue Dayong. Paratypes: 3♂7♀, as same as holotype, coll. Wu Chunguang et al.; 3♂, Cang Shan, Puladi, 1298 m, 6-7.VII.2014, coll. Li Xinxin; 1♀, Baoshan, Bawan, 1040 m, 8-10.VIII.2007, coll. Xue Dayong.

Distribution.

China (Yunnan).

Etymology.

The species is named based on the Latin vimineus, which refers to the slender right sacculus in the male genitalia.