Ypsolopha acerella Ponomarenko, Sohn 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 : 21-24

Ypsolopha acerella Ponomarenko, Sohn et Zinchenko , sp. nov.

( Figs 2 , 8–10 , 16, 16 a)

Type material. Holotype: 3, Russia, Primorskii krai, Pogranichnii district, 3 km W Barabash-Levada, 44°44'55" N 131°23'03" E, 230 m above sea level, 26 vi. 2003 (Ponomarenko leg.), gen. slide Yps.-22 MP, IBSS; with red rectangular label written " Holotype / Ypsolopha acerella ". Paratypes: RUSSIA, Primorskii krai: 33, 4Ƥ, Ussuriyskii district, Gornotaezhnoe, 5 vii. 1995 (Beljaev leg.), gen. slide Yps.-26 (3) MP; 2–26 vii. 1994; 3Ƥ, same locality, 11 vi. 1990, emerged from a larva on Acer ginnala Maxim. ; 13, 1Ƥ, Shkotovskii district, Anisimovka, 43°10'15" N 132°46'03"E, 250 m above sea level, 25 vii. 1998, gen. slide Yps.-18 YuZ (Ƥ); 33, 1Ƥ, 42 km SW Ussuriysk, Krounovka river, 43°37'18" N 131°29'56" E, 194 m above sea level, 1–2 vii. 2002, gen. slide Yps.-27 (3) MP; 1Ƥ, Ussuriyskii district, 4 km S Nikolo-Lvovskoe vil., 43°50'20" N 131°22'05" E, 164 m above sea level, 2–4 vii. 2003 (Ponomarenko leg.), IBSS; 23, 1Ƥ, Ussuriysk, 6–7 vii. 1959 (Falkovich leg.), gen. slide 14130 (Ƥ); 13, Shkotovskii district, Anisimovka, 3 vii. 1963, gen. slide 14130, ZIN. KOREA: 13, Gyonggi Province, Dongducheon, Mt. Soyosan, 30 v. 1995 (SS Kim leg.), BMNH; 23, 1Ƥ, Gyonggi Province, Is. Ganghwado, Mt. Manisan, 37°37'05"N 126°26'07" E, 18.vi.1994 (JC Sohn leg.), gen. slide SJC-523 (Ƥ), 524 (3), CBNU; 13, Gangwon Province, Wonju, Mt. Chiagsan, 15 vii. 1992 (BR Kim leg.), BMNH; 1Ƥ, Gangwon Province, Chuncheon, Gangchon, Gugog-pogpo, 37°47'28"N 127°37'05"E, 19 v. 1999 (JC Sohn leg.), emerged from a larva on Acer ginnala Maxim. , CBNU; 13, same locality, 3 vi. 1999 (JC Sohn leg.), emerged from a pupa found in leaf litters, CBNU; 13, same locality, 11 v. 2001 (JC Sohn leg.), emerged from a larva on Acer ginnala Maxim. ; 13 Province, Chuncheon, Mt. Gubongsan, 37°47'06"N 127°36'53"E, 5 vi. 2002 (JC Sohn leg.), CBNU; 1Ƥ, Gangwon Province, Chuncheon, Bongmyongri, 37°45'06" N 127°48'40"E, 9 vi. 2003 (JC Sohn leg.), BMNH.

Diagnosis. In external appearance the new species is very similar to Y. chazariella ( Mann) which widely occurs in wester and eastern Europe, Russia (Northwest of European part, Middle and Low Volga Region, North Caucasus, South Ural) and Transcaucasia ( Agassiz & Friese 1996; Sinev 2008). It is also similar in forewing pattern to Y. acerivora Shernijasova , described from Tajikistan. Ypsolopha acerella differs from Y. chazariella in the lack of strong costal strigulation on the forewing, and the anteriorly directed coecum equal 1/4 of aedeagus length in the male genitalia. Ypsolopha acerella is easy distinguishable from Y. acerivora by the wider forewings and much longer cornuti slightly shorter than half of the aedeagus. The male genitalia of the new species are closest to the East Asian Y. yasudai Moriuti in the wide obovate valva with a costal knob, but differs from the latter by the position of the knob on the costa beyond 3/4 of total valva length, the long coecum in the male genitalia, and the long ventral sclerotization of segment VIII and signum with two ridges in the female genitalia.

Description. Adult ( Fig. 2 ). Head. Vertex rough, with piliform grey scales, paler at the base and top; frons more or less smooth, pale grey. Antenna filiform, longer than forewing half; scape grey, with elongated, whitetipped scales; each flagellomere narrowly dark brown or almost black basally, widely white distally. Labial palpus curved upward, pointed terminally; all segments covered by tri-coloured scales, each light-grey in basal part, darkbrown at the middle and white at the tip; second segment as long as third, with more or less quadrangle motley tuft, paler on the inner surface and dorsally; third segment concolorous with second except paler along dorsal margin.

Thorax. Tegula and mesonotum with dark grey scales paler at tip. Fore-, mid- and hindlegs with femur almost entirely white; remainder of legs dark grey with evenly diffused dark-brown and white scales; tarsi slightly darker, each segment with whitish 1/4 distally, and dark brown spinules ventrally. Forewing length 7.8–8.3 mm (n = 9), narrower to base, termen oblique, grey peppered with dark-brown; dorsal half suffused with pale grey; two distinct dark brown streaks at basal 1/4 and near the middle of the dorsum; two oblique parallel stripes extended from the dorsal streaks, both often indistinct; a small, dark brown dot at the apex; fringe grey, with scattered brown scales. Hindwing dark grey, darker in distal half; fringe dark grey basally and pale grey distally.

Male genitalia ( Figs 8–10 ). Uncus with wedge-shaped prominence on posterior margin; socii almost straigth, three times longer than median plate of gnathos, with long setae. Gnathos with elongated median plate, 2.2 times narrower than uncus. Tegumen with two U-shaped anterior lobes and large triangular cut between them that exceeds half of tegumen length. Valva obovate, 2.2 times longer than maximum width, strongly narrowed towards the base, round distally and with large knob on costa beyond 3/4 of valva length; costa narrow, does not reach apex of valva; saccular area very narrow, indistinct beyond the 1/2 of valva length. Vinculum small, narrow band-like; saccus elongate, 2.9 times shorter than aedeagus, slightly dilated in anterior half. Anellus setose, almost as wide as valva base. Aedeagus relatively narrow, straight; coecum long, 2.4 times shorter than total length of aedeagus; cornuti as two spines arising from narrow long basal plate, slightly shorter than half of aedeagus length.

Female genitalia ( Figs 16, 16 a). Papilla analis semioval, slightly protruding dorsoterminally, setose; ovipositor long, telescopic, membrane between IX and VIII segments 6.2 times as long as segment VIII. Apophysis posterioris slender, slightly broadened anteriorly, slightly short of papilla analis apex, 4.2 times longer than apophysis anterioris; apophysis anterioris Y-shaped basally, anterior branch of every apophysis anterioris passes into anterior margin of segment VIII, strengthening it lateroventrally. Ventral part of segment VIII with long bandlike sclerotization and two small, round, setose lobes on posterior margin. Ostium bursae large; antrum coneshaped, separated from ductus bursae by ring-like sclerotization concave inward dorsally, ventral part of which as narrow band and dorsal one goblet-shaped. Ductus bursae 1.2 times shorter than corpus bursae, tubular, membranous; bulla seminalis two times shorter than ductus bursae, with long ductus seminalis. Corpus bursae obovate; signum band-like, narrowed at the middle, scobinate, with two transverse ridges.

Distribution. Russia (Far East: Primorskii krai) and Korea.

Host plant. Acer ginnala (Sapindaceae) .

Etymology. The specific name is derived from the generic name of the host plant, Acer .

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.