Ypsolopha triangula, 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: 50-51

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Ypsolopha triangula

sp. nov.

Ypsolopha triangula   sp. nov.

( Figs 47 View FIGURES 40 – 47 , 96 View FIGURES 92 – 97 , 147 View FIGURES 147 – 152 , 191 View FIGURES 188 – 193 )

Type material. Holotype: ♂, China, Mt. Fanjing (27 ° 55 ′ N, 108 ° 41 ′ E), Guizhou Province, 2100 m, 31.vii. 2001, coll. Houhun Li & Xinpu Wang, genitalia slide No. JQ07068. Paratype: 1 ♀, same data as for holotype.

Diagnosis. This species is characterized by having a triangular valva in the male genitalia ( Fig. 147 View FIGURES 147 – 152 ), which makes it distinct from its congeners. Ypsolopha triangula   is allied to Y. falcella   ([Denis et Schiffermüller]) and Y. ulingensis Yang   superficially, but differs from Y. falcella   in the forewing having a golden streak below the costa and the absence of the short strip at end of the cell ( Fig. 47 View FIGURES 40 – 47 ). The differences between Y. triangula   and Y. ulingensis   are discussed under the latter species.

Description. Adult ( Fig. 47 View FIGURES 40 – 47 ): Wing expanse 18.5 mm. Head white, golden around eyes. Antenna white, ringed with brown on each flagellomere. Labial palpus white, basal segment golden on dorsal side, second segment golden on outer side; tuft of second segment triangular, a little longer than labial palpus; third segment conspicuously shorter than second. Thorax white, with a pale yellow strip at middle. Tegula yellow. Forewing with CuA 1 and CuA 2 separated ( Fig. 96 View FIGURES 92 – 97 ), pale ocherous brown, with metallic luster, grayish brown along costa; golden streak from near base narrowed to costal 3 / 4 along below costa; fold ocherous brown medially, with a conspicuous black spot at 2 / 3; white streak extending from near base to 2 / 3 along below fold, meeting black spot at fold; pale grayish yellow mixed with brown between white streak and dorsum; cilia pale grayish yellow, golden brown at apex. Hindwing pale grayish brown; cilia grayish yellow. Legs brown mixed with white, white on inner side; hind tibia yellowish white, scattered with brown.

Male genitalia ( Fig. 147 View FIGURES 147 – 152 ): Uncus large, triangular. Socius slender, ending in point. Ventral plate of gnathos ovate. Valva triangular, truncate apically. Saccus 2 / 3 length of socius, rounded at apex. Anellus about 1 / 3 length of phallus. Phallus slender, 1.2 times length of valva, curved at middle; coecum 1 / 5 length of phallus; cornuti about 1 / 3 length of phallus, composed of two rows of microspines.

Female genitalia ( Fig. 191 View FIGURES 188 – 193 ): Intersegmental membrane between papilla analis and 8 th abdominal segment 1 / 2 length of abdomen. Apophyses posteriores about twice length of apophyses anteriores. Lamella postvaginalis trapezoid, concave in V shape on posterior 1 / 4 medially. Antrum short, parallel-sided. Ductus bursae nearly as long as corpus bursae, thickened before corpus bursae. Corpus bursae ovate; signum about 1 / 3 length of corpus bursae, ridged at anterior 1 / 3, narrowed posteriorly.

Distribution. China (Guizhou).

Etymology. The specific epithet is derived from the Latin triangulus, meaning triangular, referring to the triangular valva in the male genitalia.