Ypsolopha minuta, Jin, Qing, Wang, Shuxia & Li, Houhun, 2013

Jin, Qing, Wang, Shuxia & Li, Houhun, 2013, Review of the genus Ypsolopha Latreille, 1796 from China (Lepidoptera: Ypsolophidae), Zootaxa 3705 (1), pp. 1-91: 32

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Ypsolopha minuta

sp. nov.

Ypsolopha minuta   sp. nov.

( Figs 26 View FIGURES 26 – 32 , 76 View FIGURES 75 – 79 , 126 View FIGURES 123 – 128 , 173 View FIGURES 170 – 175 )

Type material. Holotype: ♂, China, Mt. Xinglong, Yuzhong County (35 ° 53 ′ N, 104 °06′ E), Gansu Province, 2178 m, 20.viii. 2007, coll. Feng Yang & Hanguang Gao, genitalia slide No. JQ07284. Paratypes: 8 ♀♀, 19−20.viii. 2007, coll. Houhun Li, other same data as for holotype; 4 ♂♂, 5 ♀♀, 2120 m, 29−31.vii. 1993, coll. Houhun Li, same locality as for holotype.

Diagnosis. This species can be distinguished from its congeners by the forewing having a longitudinal pale streak along middle of the cell, and the male cornuti composed of two large spines.

Description. Adult ( Fig. 26 View FIGURES 26 – 32 ): Wing expanse 14.0−15.5 mm. Vertex rough, white to grayish brown; face white, mixed with grayish brown, grayish brown to dark brown around eyes. Antenna dark gray mixed with white on scape, white ringed with dark brown on each flagellomere. Labial palpus pale grayish brown to dark brown, mixed with white, basal segment and dorsal surface of second segment white; tuft of second segment triangular, conspicuously shorter than labial palpus; third segment much longer than second. Thorax ocherous, with white to pale yellowish brown streak along both margins. Tegula ocherous. Forewing pale yellowish brown to deep ocherous brown, sprinkled with grayish brown yellowish white-tipped scales along basal 1 / 4 of costa, on median 1 / 3 below costa, between end of cell and termen on anterior half, and along fold; longitudinal pale streak along middle of cell, yellow on basal 3 / 4, white on distal 1 / 4; numerous dark brown dots placed along upper margin of cell on distal 3 / 4, much fewer in some individuals; dorsum grayish white at base, with a gray trapeziform patch at 1 / 3; cilia concolorous with wing. Hindwing and cilia gray to dark brown. Fore- and midlegs gray mixed with white, white mixed with gray on ventral surface; hindleg grayish white, sprinkled with pale grayish brown dorsally, dark brown on tarsus. Abdomen grayish brown tinged with white.

Male genitalia ( Fig. 126 View FIGURES 123 – 128 ): Uncus degenerate. Socius stout, pointed apically. Ventral plate of gnathos rounded. Valva narrow at base, broadened gradually to rounded apex. Saccus about 1.5 times length of socius, rounded at apex. Anellus about 3 / 10 length of phallus, sparsely spinous. Phallus about twice length of valva, slightly curved near base; coecum about 1 / 9 length of phallus, inception of ductus ejacuiatorius near base of phallus; cornuti about 1 / 2 length of phallus, composed of two large spines.

Female genitalia ( Fig. 173 View FIGURES 170 – 175 ): Intersegmental membrane between papilla analis and 8 th abdominal segment 1 / 3 length of abdomen. Apophyses posteriores about 1.7 times length of apophyses anteriores. Lamella postvaginalis a sclerotized trapeziform plate, posterior 1 / 3 concave in U shape at middle. Antrum nearly cup-shaped. Ductus bursae 2−3 times length of corpus bursae, thickened in anterior 1 / 3, granulous between inception of ductus seminalis and corpus bursae. Corpus bursae rounded; signum about 1 / 2 length of corpus bursae, ridged at anterior 1 / 4 and posterior 1 / 6 respectively.

Distribution. China (Gansu).

Etymology. The specific epithet is derived from the Latin minutus, meaning small, referring to the relatively smaller wing expanse within the genus.

Remarks. This species varies in the venation of the forewing, viz., R 4 and R 5 are stalked ( Fig. 76 View FIGURES 75 – 79 a) in most individuals, and R 3 is stalked with R 4 + 5 ( Fig. 76 View FIGURES 75 – 79 b) in some individuals. In despite of the distinct variation, the structures of the male and female genitalia are steady.