Timandra distorta, 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 distorta sp. n. Figs 4, 22, 39, 45

Description.

Head. Antennae bipectinate in basal four-fifths in male, dorsal surface of shaft yellowish-brown, sometimes coverded with brown scales, pectination covered with ciliae, basally black. Frons yellowish-brown with ventral side yellowish-white, slightly protruding (Fig. 39). Labial palpi yellowish-brown, reaching to tip of frons. Vertex pale yellowish-brown. Thorax. Patagia yellowish-brown. Tegulae and thorax pale yellowish-brown. Hind tibia with two pairs of spurs in male. Forewing length: male 12-15 mm. Forewing with apex pointed, slightly protruding; costa curved on terminal part; outer margin slightly protruding below vein M3. Apical angle of hindwing rounded, outer margin protruding on vein M3. Wing colour pale yellowish-brown, covered with blackish-brown spots especially on costal area of forewing. Forewing with discal spot reddish-brown and small; medial line reddish-brown, straight and narrow, arising from apex and extending to middle part of terminal margin; postmedial line overlapping with medial line near apex, separating from it on vein R5, slightly convex between veins M3 and CuA1; terminal line reddish-brown and very narrow. Fringes yellowish-brown, mixed with reddish-brown terminally. Hindwing with medial line reddish-brown, straight, narrow; postmedial line protruding between veins M3 and CuA1; terminal line and fringes similar to those of forewing. Underside densely covered with dark brown speckles; discal spot of forewing and postmedial lines of both wings darker than those of upperside.

Male genitalia. Uncus small and stout, rounded at apex. Socii thin and flat, curved, covered with small spurs on surface, extending beyond tip of uncus; a short and triangular process present at base of outer margin of both socii. Costa with a ridge at approximately one-third from apex; valvula forming a narrow digitiform process both at apex of costa and on ventral margin, apical part of valvula between two processes membranous; sacculus short and stout, acute at tip. Juxta long, narrowing in terminal part. Aedeagus with basal half narrow; vesica partly sclerotized and crinkled.

Female genitalia. Unknown.

Diagnosis.

The most discriminating character between T. apicirosea and T. distorta is the shape of the socii of the male genitalia. For more comparisons, see T. apicirosea above.

Type material.

Holotype, ♂, CHINA: Tibet (IZCAS): 1♂, Mêdog, Yarang, 1091 m, 20-23.VIII.2006, coll. Lang Songyun. Paratype: Tibet (IZCAS): 1♂, Bomi, 2750 m, 26.VIII.1982, coll. Han Yinheng.

Distribution.

China (Tibet).

Etymology.

The species is named referring to the Latin distortus, which refers to the curved socii in the male genitalia.