Timandra adunca, 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 adunca sp. n. Figs 9, 27, 50, 67

Description.Head. Antennae bipectinate in basal four-fifths in male, filiform in female; pectination covered with ciliae, black on basal part; dorsal surface of shaft deep brown with base reddish-brown. Frons yellowish-brown to deep yellowish-brown with ventral side yellowish-white, protruding with a sharp protrusion. Labial palpi yellowish-brown, sometimes reaching to tip of frons. Vertex pale yellowish-brown. Thorax. Patagia brown. Tegulae and thorax pale yellowish-brown. Fore leg with reddish-brown scales on dorsal side. Hind tibia with two pairs of spurs in male. Forewing length: male 14-17 mm, female 15-16 mm. Apex of forewing acute, slightly protruding; outer margin nearly straight; hindwing with sharped apical angle; outer margin angled on vein M3. Wing colour pale yellowish-brown covered with brown spots, costa of forewing dark brown with red suffusion. Forewing with deep reddish-brown and nearly triangular discal spot; medial line reddish-brown, straight and narrow, arising from inner side of apex and extending to middle part of terminal margin; postmedial line grey and narrow, separating from medial line on vein M1, slightly curved; fringes reddish-brown with blackish-brown at tip. Hindwing with medial and postmedial lines straight and narrow, the former reddish-brown and the latter grey; fringes similar to those of forewing. Underside with dark brown speckles; postmedial line on hindwing more distinct than on upperside.

Male genitalia. Uncus raised. Socii present as a pair of narrow digitiform processes, beyond tip of uncus. Valvula with costa dilated at apex; arm between valvula and sacculus long and hook-like, extending beyond distal end of sacculus; sacculus very broad, rounded and densely covered with short setae terminally. Juxta long and narrow at terminal half. Saccus long and rounded at apex. Aedeagus slender and curved, without cornutus.

Female genitalia. Seventh sternite trapezoid and strongly sclerotized with weakly bifurcate posterior margin. Colliculum short and narrow. Ductus bursae membranous with a membranous appendix bursae on posterior part, about two-fifths length of corpus bursae. Corpus bursae elongate oval; signum consists of a triangular pouch directed towards anterior part, with a longitudinal ridge running from apex.

Diagnosis.

See T. correspondens .

Type material.

Holotype, ♂, CHINA: Yunnan (IZCAS): Ruili, Wanting forest park, 900 m, 29.IV.2011, coll. Yang Xiushuai and Wang Ke. Paratypes: Guangxi (IZCAS): 2♂, Longsheng, Baiyan, 1150 m, 20.VI.1963, coll. Wang Chunguang; 1♀, Mao’er Shan, Antangping, 1579 m, 17-18.VIII.2012, coll. Yang Chao; 1♀, Huanjiang, Yangmeiao, 1189 m, 18-22.VII.2015, coll. Jiang Nan. Guizhou (IZCAS): 3♂, Panxian, Hongguozhen, Pengjiakou, 2065 m, 6-8.VII.2016, coll. Ban Xiaoshuang. Yunnan (IZCAS): 1♂, Lushui, Pianma, 1980 m, 3-4.VII.2014, coll. Pan Xiaodan; 1♂, Gong Shan, Dulongjiang, 1505 m, 8-9.VII.2014, coll. Pan Xiaodan; 1♂, Lushui, Pianma, 2300 m, 30.V.1981, coll. Liao Subai; 1♂, Yingjiang, 1700 m, 16.IV.1980, coll. Li Hongxing; 1♀, Tengchong, Heinitang, 1930 m, 28-30.V.1992, coll. Xue Dayong; 1♂, Tengchong, Dahaoping, 2020 m, 5-7.VIII.2007, coll. Wu Chunguang; 1♂, Tengchong, Qushi, Daba, 1823-1873 m, 4-5.VIII.2013, coll. Liu Shuxian; 1♂, Tengchong Shidi, 1730 m, 3-5.VIII.2016, coll. Ban Xiaoshuang; 4♂2♀, Tengchong, Houqiao, 1620 m, 6-8.VIII.2016, coll. Ban Xiaoshuang; 3♂, Pingbian, Dawei Shan, 1500-2090 m, 18.VI.1956, 19-20.VII.2016, 4-8.VIII.2017, coll. Huang Keren et al.; 1♂1♀, Wenshan, Malipo, Tianshengqiao, 1105 m, 7, 15.XI.2003, coll. Lu Shengxian. Vietnam (IZCAS): 1♀, 23. XI– 2.XII.2012, coll. Chen Fuqiang.

Distribution.

China (Guangxi, Guizhou, Yunnan), Vietnam.

Etymology.

The species is named based on the Latin aduncus, which refers to the hook-like arm between the valvula and the sacculus in the male genitalia.