Cochylis triangula, Sun & Li, 2013

Sun, Yinghui & Li, Houhun, 2013, Cochylis Treitschke in China: one new species and five new records (Lepidoptera, Tortricidae, Cochylini), ZooKeys 258, pp. 85-96 : 92-94

Cochylis triangula sp. n. Figs 6 , 11 , 16

Type material.

CHINA: Holotype ♂, Guizhou Province: Guocun Village, Daozhen County (28°53'N, 107°36'E), 1300 m, 21.viii.2004, leg. Yunli Xiao, genitalia slide No. SYH10220.

Paratypes: 1 ♀, same data as for holotype. Yunnan Province: 2 ♂♂, Xiaoheishan, Longling County (24°35'N, 98°41'E), 2300 m, 10.viii.2005, leg. Yingdang Ren.

Description.

Adult ( Fig. 6 ) with wingspan 15.5-17.0 mm. Vertex and frons pale yellowish white. Antenna yellowish brown, mixed with brownish black scales. Labial palpus slender, about 1.5 times length of eye’s diameter, yellowish brown on outer surface, yellowish white on inner surface. Thorax and tegula pale yellowish white, tegula with a brownish black spot at base. Forewing with costal margin straight, apex protruded, termen oblique. Ground color pale yellowish white; costal margin mixed with small brownish black spots on basal half, with brownish black spots at base and at basal 1/4, with a short and thin stripe at distal 1/6; basal patch occupying basal 1/4 of forewing, consisting of thin grayish black stripes; median fascia from middle of costal margin extending obliquely to middle of dorsum, grayish black with sparse ochreous yellow, anterior 1/4 oblique outward, somewhat narrow, anterior 1/4 to 1/2 disappeared, posterior half somewhat broad, oblique inward; subapical fascia a brownish black stripe along termen, mixed with ochreous yellow scales; tornus with a large brownish black patch; dorsum with small brownish black spots; cilia pale brown. Hindwing and cilia grayish white. Fore- and midlegs brownish black, with yellowish white rings; hindleg yellowish white. Abdomen grayish brown.

Male genitalia

( Fig. 11 ). Socius about 2/3 length of median process of transtilla. Valva short and broad, outer margin slightly convex, dorsal corner slightly pointed, with a spine-shaped process at basal 1/3 near outer margin; costa concave; transtilla broad, gradually narrowed from base to middle, median process about 1/3 length of transtilla. Sacculus heavily sclerotized, almost same length as costa, dorsal margin straight, ventral margin protruded subtriangularly, apex pointed and hook-shaped; vinculum slender, connected with membrane ventrally. Juxta nearly semicircular, anterior margin rounded, posterior margin straight. Phallus about two times length of costa, basal 3/5 stout, distal 2/5 thick thorn-shaped; cornutus a cluster short thin spines, about 2/5 length of phallus.

Female genitalia

( Fig. 16 ). Papilla analis somewhat small, about 1/2 length of apophysis posterioris. Apophysis anterioris slightly shorter than apophysis posterioris. Sterigma weakly sclerotized, weakly defined. Seventh sternum forming a special membranous pocket, surrounding antrum. Antrum heavily sclerotized, nearly rectangular, with a heavily sclerotized vertical band at middle. Ductus bursae short and broad, about 1/2 length of antrum, weakly sclerotized, with vertical wrinkles. Corpus bursae oval.

Diagnosis.

This species is similar to Cochylis posterana hyrcana , but Cochylis triangula sp. n. can be distinguished by the sacculus with ventral margin protruded triangularly, and the cornutus being a cluster of short and thin spines in the male genitalia; the nearly rectangular antrum with a heavily sclerotized vertical band at middle in the female genitalia. In Cochylis posterana hyrcana , the ventral margin of the sacculus is straight, and the cornutus consists of a bundle of more than ten thin spines in the male genitalia; the antrum is composed of two rounded plates close to each other and the absence of the sclerotized vertical band at middle in the female genitalia.

Distribution.

China (Guizhou, Yunnan).

Etymology.

The specific name is the feminine form of the Latin adjective triangulus, meaning triangular, referring to the triangular sacculus.

Figures

Figures 1 - 6. Adults of Cochylis spp. 1 Cochylis atricapitana (Stephens), female (Buerjin, Xinjiang) 2 Cochylis discerta Razowski, female (Sunan, Gansu) 3 Cochylis dubitana (Huebner), male (Tahe, Heilongjiang) 4 Cochylis faustana (Kennel), male (Beitun, Xinjiang) 5 Cochylis posterana hyrcana (Toll), male (Tacheng, Xinjiang) 6 Cochylis triangula sp. n., holotype, male (Daozhen, Guizhou). (scales = 2.5 mm).

Figures 7 - 10. Male genitalia of Cochylis spp. 7 Cochylis discerta Razowski, slide No. SYH 11644 8 Cochylis dubitana (Huebner), slide No. SYH 10244 9 Cochylis faustana (Kennel), slide No. SYH 11447 10 Cochylis posterana hyrcana (Toll), slide No. SYH 11434 11 Cochylis triangula sp. n., paratype, slide No. SYH 10200. (scales: 0.5 mm).

Figures 12 - 16. Female genitalia of Cochylis spp. 12 Cochylis atricapitana (Stephens), slide No. SYH 11456 13 Cochylis discerta Razowski, slide No. SYH 11573 14 Cochylis faustana (Kennel), slide No. SYH 10228 15 Cochylis posterana hyrcana (Toll), slide No. SYH 11445 16 Cochylis triangula sp. n., paratype, slide No. SYH 11700. (scales: 0.5 mm).