Ypsolopha atrobrunnella 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 : 19-21

Ypsolopha atrobrunnella Ponomarenko et Sohn , sp. nov.

( Figs 1 , 6, 7 , 15, 15 a)

Type material. Holotype: 3, Russia, Primorskii krai, 14 km SW Slavyanka, Ryazanovka, 42°47'36" N 131°15'06"E, 4 ix. 1997 (Ponomarenko leg.), gen. slide Yps.-16 MP, IBSS; with red rectangular label written " Holotype / Ypsolopha atrobrunnella ". Paratypes: RUSSIA, Primorskii krai: 2Ƥ, Ussuriyskii district, Gornotaezhnoe, 43°41'42" N 132°09'24"E, 28, 30 viii. 1994 (Ponomarenko leg.), gen. slides Yps.-14 YuZ, Yps.-15 YuZ; 13, Ussuriysk vicinity, Far Eastern Station of Plant Protection, 27 vi. 1958 (Sytenko leg.), gen. slide Yps.-17 MP, IBSS; 13, Ussuriyskii district, Nikolsk, 9 vii. 1932, emerged from a larva on Pyrus sp. (Tokareva leg.), gen. slide 13568; 1Ƥ, Gornotaezhnoe, 25 vi. 1966, emerged from a larva on Crataegus maximowiczii Schneid. (Kuznetsov, Zabello leg.), gen. slides 13568, ZIN. CHINA: 1Ƥ, Heilongjiang Prov., Dailing, 24 vii. 1963 (JW Bai leg.), gen. slide IOZ- 0 9014, IZCAS.

Diagnosis. The male genitalia of the new species is similar to those of transpalaearctic Y. vittella (Linnaeus) and East Asian Y. parallela (Caradja) in the obovate valva with maximum width at 3/4, the wide setose anellus, and the nearly straight aedeagus with relatively large coecum. The female genitalia are similar to those of East Asian Y. tsugae Moriuti in the densely spinulose anterior part of ductus bursae, the oval shape of corpus bursae and the relatively wide, band-like signum. The genitalia are also similar to those of Y. parallela in the V-shaped ventral sclerotization of segment VIII. Ypsolopha atrobrunnella can be easily distinguished from all aforementioned congeners by the almost uniformly dark brown forewings with a violet luster, the uncus angularly convex on posterior margin in the male genitalia and the longer part of ductus bursae bearing minute inner spines in the female genitalia.

Description. Adult ( Fig. 1 ). Head. Vertex rough, with dark greyish-brown, elongated narrow scales, with lightgrey tips; frons more or less smooth, covered by dark brown dilated scales with violet luster. Antenna filiform; scape dark brown with light grey pecten; each segment of flagellum dark brown on basal half, white on distal half. Labial palpus porrect and antrorse, pointed terminally; third segment as long as second, pale grey dorsally and on inner side, dark brown outside and ventrally, dark brown apically; second segment, white dorsally, with a brown triangular tuft ventrally.

Thorax and abdomen. Tegula and mesonotum dark brown with violet luster. Foreleg with a part of femur and entire tibia dark brown dorsally, white ventrally; each tarsomere greyish brown basally. Midleg mainly white, with each tarsomere greyish brown basally. Hindleg orange white, with tarsomeres tinged with dark brown on basal 2/3; tibia with a tuft of strong, short, hair-like scales along lower margin; tibial spurs brownish. Forewing length 8.1–8.4 mm (n = 4), subtrapezoidal, with falcate, obtuse apex and sinuate termen, dark brown with violet luster; two semicircular shaded patches, each on basal 1/4 and in the middle of the dorsum; fringe dark brown. Hindwing dark brownish grey, paler to base; fringe dark grey. Abdomen dark brownish grey dorsally, dark grey ventrally.

Male genitalia ( Figs 6, 7 ). Uncus as wide as vinculum, angularly convex on posterior margin; socii 2.7 times longer than median plate of gnathos, almost straight, with parallel sides on basal 3/4, tapering to pointed apex and slightly curved outwardly at distal 1/4, long-setose. Gnathos with cup-shaped median plate, almost two times narrower than uncus width. Tegumen with a Y-shaped median sclerotization, cleaved in a pair of triangular lobes anteriorly deeper than mid-length of tegumen. Valva obovate, 2 times longer than maximum width, considerably narrowed to base, rounded distally; costa strong sclerotized, reaching 2/3 of valvar length; saccular area equal to costa in width, about 4/5 of valva length. Vinculum band-like, arched laterally, with stick-like saccus, equal to socii in length. Anellus setose and wider than basal part of valva. Aedeagus almost straight, with obliquely truncated apex; coecum 1/4 as long as whole aedeagus, wider than distal end of aedeagus; cornuti as two long spines, almost equal to half of aedeagus length, each curved beyond middle.

Female genitalia ( Figs 15, 15 a). Papilla analis semioval, slightly protruding dorsoterminally, setose; ovipositor telescopic, membrane between IX and VIII segments almost 4.6 times as long as segment VIII. Apophysis posterioris slender, almost reaching apex of papilla analis, thickened anteriorly, 4.1 times longer than apophysis anterioris; apophysis anterioris with Y-shaped base, its shorter and thinner branch strengthening anterior margin of segment VIII lateroventrally. Ventral V-shaped sclerotization of segment VIII with two lobes posteriorly, every separated almost to base and bearing long setae on the rounded apex. Ostium about 1/3 as wide as segment VII; antrum cone-shaped, separated from ductus bursae by lateral narrowing and ring-like sclerotization concave inward dorsally, ventral part of it as wide band and dorsal one with wedge-shaped prominence on anterior margin. Ductus bursae tubular, 2.3 times longer than corpus bursae, strengthened by broad band of dense, minute thorns on one side after distal 1/3, rest part of ductus with sparse, small thorns, except over short distance just after antrum; bulla seminalis smaller than corpus bursae, with ductus seminalis shorter than bulla seminalis, arising from at distal 1/16 of ductus bursae. Corpus bursae ovate, membranous; signum band-like, dilated posteriorly, scobinate, with two transverse ridges.

Distribution. Russia (south of Far East) and China (Northeast).

Host plants. Crataegus maximowiczii Schneid. , Pyrus sp. ( Rosaceae ).

Etymology. The specific name, atrobrunnella , is derived from two Latin roots atro - and brunne-, collectively meaning “dark brown”, and refers to the forewing coloration of the new species.

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.