Ypsolopha yangi Ponomarenko et Sohn

Ponomarenko, Margarita G., Sohn, Jae-Cheon, Zinchenko, Yuliya N. & Wu, Chun-Sheng, 2011, Five new East-Asian species of the genus Ypsolopha Latreille (Lepidoptera: Ypsolophidae), Zootaxa 2760, pp. 18-28 : 24-25

Ypsolopha yangi Ponomarenko et Sohn , sp. nov.

( Figs 3 , 11, 12 , 17, 17 a)

Type material. Holotype: 3, China, Beijing, Mt. Baihuashan, 2 vii. 1972, IZCAS, with red rectangular label written " Holotype / Ypsolopha yangi ". Paratypes: CHINA: 13, same locality and date as holotype; 6Ƥ, same locality, 2–4 viii. 1972; 63, 1Ƥ, same locality, 6 vii. 1973, gen. slide IOZ-09018 (3); 1Ƥ, same locality, 16 vii. 1973; 33, same locality, 21 vii. 1973; 13, 3Ƥ, same locality, 23 viii. 1973, gen. slide IOZ-09019 (Ƥ); 1Ƥ, Sichuan Prov., Wanxian, 27 ix. 1994, IZCAS. RUSSIA, Primorskii krai: 23, 5Ƥ, 42 km SW Ussuriysk, Krounovka river, 43°37'18" N 131°29'56" E, 194 m above sea level, 3 vi, 1–2 vii. 2002, gen. slide Yps.-28 (3) MP; 23, 1Ƥ, 5 km E Nikolo-Lvovskoe village, 43°52'16" N 131°25'14" E, 174 m above sea level, 3– 4 vii, 15–16 viii. 2002, 13, 7 km S Nikolo-Lvovskoe, 43°49'22" N 131°22'29" E, 27 vii. 2003; 113, 12Ƥ, 4 km N Monakino, 43°47'65" N 131°26'38" E, 23 iv. 2003, gen. slide Yps.-23 (3) MP, Yps.-25 (3) YuZ, gen. slide Yps.-24 (Ƥ) YuZ; 13, Oktyabrskii district, Orlikha river, 48 km NW Ussuriysk, 43°56'37" N 131°25'13" E, 200 m above sea level, 31 vii. 2005 (Ponomarenko leg.), IBSS.

Diagnosis. The new species is superficially similar to Y. chazariella ( Mann) and Y. acerella , another new species described in this paper, but its black longitudinal streaks along the forewing veins are lacking in the latter two species. The new species is similar to the transpalaearctic Y. leuconotella (Snellen) in genitalia, specifically in the relatively wide socii with maximal width at 1/4 of uncus base, the obovate shape of the valva, the tegumen not deeply cleaved into a pair of U-shaped anterior lobes, the cornuti as two spinulate bands in the male; and in the anteriorly slightly dilated ductus bursae and relatively large signum located in distal half of corpus bursae in the female. The new species can be easy distinguished from the aforementioned species by the arched aedeagus with a shorter coecum in the male genitalia, and by the basally narrowed ventral sclerotization of segment VIII with two distinct distal lobes in the female genitalia.

Description. Adult ( Fig. 3 ). Head. Vertex rough, with piliform, brownish grey, white-tipped scales; frons more or less smooth, brownish grey. Antenna filiform, longer than forewing half; scape greyish brown except whitish distal margin; each flagellomere white on basal 2/3, dark brown on distal 1/3. Labial palpus elongated and curved upward, pointed terminally; third segment as long as second, mainly brownish grey, pale grey dorsally; second segment pale grey dorsally, with trapezoidal tuft of greyish brown, white-tipped scales longer and less dense distally.

Thorax and abdomen. Tegula dark greyish brown, each scale with white top; mesonotum dark brown with four longitudinal, pale grey streaks, two submedially and two submarginally. Fore- and midlegs dark greyish brown dorsally and pale grey, speckled with dark brown ventrally; each tarsomere with a whitish, narrow ring distally. Hindleg from coxa to middle of tibia yellowish-white, tibia tinged with dark grey after middle, with brownish spurs and tuft of spine-like scales along lower margin and distal end; tarsi dark greyish brown, each segment white distally. Forewing length 7–9 mm (n = 29), with nearly constant width throughout, apex round, termen oblique, dark greyish brown; costa with three black spots, each subbasally, medially, and postmedially; thin, dark brown streaks along veins; dorsal area white, divided medially by a black transverse streak; dorsum with broad, dark brown, transverse band, two times waved along interior margin; fringe dark grey. Hindwing narrowly rounded apically, brownish grey, paler to base; fringe brownish grey. Abdomen dark grey intermixed with dark brown dorsally, orange white speckled with dark brown ventrally.

Male genitalia ( Figs 11, 12 ). Uncus rectangular, with straight posterior margin; socii sinuate, slightly dilated at the middle, 2.2 times longer than median plate of gnathos, with long setae. Gnathos with elongated median plate, 1.6 times narrower than uncus. Tegumen cleaved in a pair of U-shaped lobes anteriorly not deeper than 1/3 of tegumen. Valva obovate, 2.4 times longer than maximum width, slightly narrowed to base; costa narrow, as long as dorsal margin of valva; saccular area very narrow, indistinct beyond the 3/4 of valvar length. Vinculum small, triangular; saccus long, 2.4 times shorter than aedeagus, with triangular base and slightly dilated in anterior 1/3 part. Anellus setose, almost same width as base of valva. Aedeagus relatively narrow, arched; coecum 1/9 as long as whole aedeagus; cornuti as two spinulate bands, longer than half of aedeagus, each with a short needle distally.

Female genitalia ( Figs 17, 17 a). Papilla analis conical, slightly protruded dorsoterminally, setose; ovipositor moderate in length, telescopic, membrane between segments IX and VIII 3.8 times as long as segment VIII. Apophysis posterioris slender, slightly thickened anteriorly, almost reaching apex of papilla analis, three times longer than apophysis anterioris; apophysis anterioris Y-shaped basally, anterior branch arched band-like, continuing to anterior margin of sternite VIII. Ventral part of segment VIII with V-shaped sclerotization, each lobe separated in posterior third only, extended lateroposteriorly, with long setae. Ostium bursae about 2.5 times narrower than segment VII; antrum cone-shaped, separated from ductus bursae by ring-like sclerotization concave inward dorsally; that ring-like sclerotization as narrow band ventrally and conically dilated dorsally. Ductus bursae tubular, slightly dilated towards corpus bursae; bulla seminalis smaller than corpus bursae, with short ductus seminalis. Corpus bursae ovate; a band-like signum medially constricted to form two rhomboid scobinate plates each with a transverse ridge.

Distribution. Russia (Far East: Primorskii krai) and China (North and Southwest).

Etymology. This species is named in honor of Dr. Ji-Kun Yang, a Chinese lepidopterist, for his contribution to the knowledge of the Lepidopteran fauna of Northeastern China.

Figures

FIGURES 1 – 5. Adults of Ypsolopha spp.: 1, Y. atrobrunnella sp. nov., holotype, Russia; 2, Y. acerella sp. nov., holotype, Russia; 3, Y. yangi sp. nov., paratype, Russia; 4, Y. tesselatidorsata sp. nov., holotype, Russia; 5, Y. lutisplendida sp. nov., holotype, China.

FIGURES 6 – 14. Male genitalia of Ypsolopha spp.: 6 – 7, Y. atrobrunnella sp. nov., holotype, Russia; 8 – 10, Y. acerella sp. nov., holotype, Russia; 11 – 12, Y. yangi sp. nov., paratype, Russia; 13 – 14, Y. tesselatidorsata sp. nov., holotype, Russia. 6, 8, 11, 13, ventral view; 7, 9, 12, 14, aedeagus; 10, endophallus.

FIGURES 15 – 17. Female genitalia of Ypsolopha spp.: 15 – 15 a, Y. atrobrunnella sp. nov., paratype, Russia; 16 – 16 a, Y. acerella sp. nov., paratype, Russia; 17 – 17 a, Y. yangi sp. nov., paratype, Russia. 15, 16, 17, general view; 15 a, 16 a, 17 a, ventral sclerotization of segment VIII.