Ypsolopha tesselatidorsata Ponomarenko et Zinchenko

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 : 25-26

Ypsolopha tesselatidorsata Ponomarenko et Zinchenko , sp. nov.

( Figs 4 , 13, 14 , 18, 18 a)

Type material. Holotype: 3, Russia, Primorskii krai, 42 km SW Ussuriysk, Krounovka river, 43°37'18" N 131°29'56" E, 194 m above sea level, 1–2 vii. 2002 (Ponomarenko leg.), gen. slide Yps.- 20 MP, IBSS; with red rectangular label written " Holotype / Ypsolopha tesselatidorsata ". Paratypes: Russia, Primorskii krai: 13, same data as holotype, gen. slide Yps.-21 MP; 1Ƥ, same locality and collector, 12 viii. 1999; 1Ƥ, 18 km N Arsen'ev, Lukinka river, 44°21'08" N 133°19'37" E, 17 viii. 1998, gen. slide Yps.-19 YuZ; 1Ƥ, 7 km S Nikolo-Lvovskoe, 43°49'22" N 131°22'29" E, 27 vii. 2003 (Ponomarenko leg.), IBSS.

Diagnosis. The species is superficially similar to the North American Y. querciella (Busck) in the forewing with a zigzag line on dorsum. The colour of the dorsal line is dark grayish brown with violet luster in Y. tesselatidorsata , whereas yellowish olive-brown in Y. querciella . The male genitalia of the new species are similar to those of Y. falcella ([Denis & Schiffermüller]) and Y. yasudai Moriuti , specifically by the presence of a relatively large knob on the costa of valva, the uncus with convex posterior margin, rounded median plate of gnathos, and short saccus. However, Y. tesselatidorsata differs from two last mentioned species in the golden ground colour of forewings with scattered yellowish-brown scales and dark brown pattern of forewing, its dorsal half with violet luster. Also the new species can be distinguished by the narrower valva in the male genitalia, and cone-shaped antrum and large band-shaped signum with two ridges in the female genitalia.

Description. Adult ( Fig. 4 ). Head. Vertex rough, with piliform pale yellow scales; frons more or less smooth, pale yellow. Antenna filiform, longer than a half of forewing; scape paler yellow than vertex and frons; each flagellomere concolorous to scape on basal half, greyish-brown on distal half. Labial palpus elongated and curved upward, pointed terminally; first segment yellowish-white; second segment as long as third, with triangular tuft of dense scales longer distally, mainly brownish-yellow on outside except narrow distal whitish strip, and pale yellow on dorsal margin and on inner side; third segment brownish yellow, paler on inner surface.

Thorax. Tegula and mesonotum greyish brown, posterior margin of both darker with violet luster. Fore-, mid- and hindlegs concolorous, pale yellow; only tarsi slightly darker, every segment with whitish distal 1/4 and dark brown spinules ventrally. Forewing length 6.8–7.8 mm (n = 5); wing narrower basally, costal margin convex, termen oblique, groundcolour golden, dispersed with yellowish brown; dark brown spots with violet luster forming zigzag line more distinct in males, largest spots are staggered ones on dorsal half of wing: along anal fold, beyond the cell, on inner angle of wing and at middle of dorsal margin; two small costal spots are on the middle and about 3/4 of forewing length; fringe brownish yellow. Hindwing dark grey, darker in distal half; fringe light grey.

Male genitalia ( Figs 13, 14 ). Uncus rhomboid with convex posterior margin; socii almost straight, pointed apically, 3.5 times longer than median plate of gnathos, with long setae. Gnathos with rounded median plate, three times narrower than uncus. Tegumen with two U-shaped lobes on the anterior margin, cut between them reaches half of tegumen length. Valva strongly narrowed towards the base and round distally, two times longer than maximum width, with relatively large knob at 3/4 of total valva length; costa narrow, reaching to 3/4 of dorsal margin; saccular area very narrow, drawing along ventral margin. Vinculum triangular; saccus 4.3 times shorter than aedeagus, slightly dilated apically. Anellus setose and wider than base of valva. Aedeagus relatively narrow, almost straight; coecum 1/5 as long as whole aedeagus; cornuti as two needles, with common basal plate, longer than half of aedeagus.

Female genitalia ( Figs 18, 18 a). Papilla analis triangular, slightly protruding dorsoterminally; ovipositor moderate in length, telescopic, membrane between segments IX and VIII 3.6 times as long as segment VIII. Apophysis posterioris slender, slightly thickening anteriorly, short of apex of papilla analis, four times longer than apophysis anterioris; apophysis anterioris Y-shaped basally, anterior branch passes into anterior margin of sternite VIII, strengthening it lateroventrally. Ventral part of segment VIII with dilated distally sclerotization, anterior margin of the latter roundly hollowed, posterior margin with slit-like incision and two long-setose lobes extended outwardly. Ostium bursae wide; antrum cone-shaped, separated from ductus bursae by ring-like sclerotization concave inward dorsally, ventral part of it as relatively wide band, and dorsal part goblet-shaped. Ductus bursae almost equal with corpus bursae in length, dilated towards corpus bursae, with minute thorns in distal half of ductus and larger ones on one side of its proximal half, only anterior 1/5 of ductus lacking the thorns; bulla seminalis slightly shorter than corpus bursae, with relatively short ductus seminalis. Corpus bursae ovate; signum longer then half length of corpus bursae, as a wide band narrowed in middle and dilated anteriorly, scobinate, with two transverse ridges.

Distribution. Russia (Far East: Priimorskii krai).

Etymology. The specific name tesselatidorsata is derived from the Latin tesselatus (checkered) and dorsum (back), in concordance with the pattern of the forewing dorsal half.

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 18 – 19. Female genitalia of Ypsolopha spp.: 18 – 18 a, Y. tesselatidorsata sp. nov., paratype, Russia; 19, Y. lutisplendida sp. nov., holotype, China. 18 – 19, general view; 18 a, ventral sclerotization of segment VIII.