Ypsolopha occultatella Ponomarenko, 2020

Ponomarenko, M. G., 2020, New species of the genus Ypsolopha Latreille, 1796 (Lepidoptera: Ypsolophidae) from the south of the Russian Far East, Far Eastern Entomologist 421, pp. 14-26 : 20-24

Ypsolopha occultatella Ponomarenko , sp. n.

http://zoobank.org/NomenclaturalActs/ 7013C45B-3343-4778-B704-4D7EF849C04E

Figs 2 , 6–10

TYPE MATERIAL. Holotype: ♂, Russia: Khabarovskii krai, Vaninskii distr., Lidoga-

Vanino track, 62 km W Vanino, 49°03'14" N, 139°25'05" E, 680 m above sea level, 30.07.

2019, gen. slide 139 MP (Ponomarenko leg.). Paratypes: 9 ♂, 3 ♀, same locality, date and sentatives of ypsolophid species collector, gen. slides 141 (m), 140 (f), 142 (f) MP ; 3 ♂, same locality and collector, 9.08 .

2020; Primorskii krai: 3 ♂, 2 ♀, Dalnegorskii distr., 15 km NW Dalnegorsk, 3 km NE

Taiga vill., 18.07.2000, gen slides 143–145 (m), 146-147 (f) MP; Chuguevskii distr., “Zov

Tigra ” Nat. Park, 1 ♀ , 24,5 km SE Yasnoe vill., 16.07.2010, gen slide 148 (m) MP, 1 ♂, 3 ♀ ,

16 km SE Yasnoe vill., “Pobedinskaya polyana”, 2.08.2012 (Ponomarenko leg.).

– Y. blandella . Scale bar 0.1 mm.

DIAGNOSIS. The new species is similar in pattern of forewing with Y. yasudai ( Fig. 3 )

and Y. falcella ( Fig. 4 ), but can be distinguished by dark greyish-brown costal part of forewing from the first and greyish-yellow dorsal part and smaller longitudinal dark spot at near

1/3 of wing length from the second. In the genitalia a new species is similar to Y. yasudai , but most easy it differs by length and width of coecum in the male genitalia. The coecum is about 1/4 of total aedeagus length and narrow like middle part of aedeagus tube (Fig. 11). In the female genitalia a new species distinguishable by slightly diverging sclerotized bands in ventral part of VIII segment. Y. yasudai has the aedeagus with coecum is about 1/6 of its total length and thicker than middle part of aedeagus tube in the male genitalia and almost parallel sclerotized band in ventral part of VIII segment in the female genitalia.

Adult ( Fig. 2 ). Head mainly white on the frons and vertex, with greyish-brown scales around eyes. Antenna with white scapus and pedicellus, flagellum with dark ring on the each segment distally. Basal segment and short third one in labial palpus white; the second segment with large tuft, 2 times as long as head length, greyish-brown laterally and white on inner side and upper margin. Thorax white anteriorly ang light-yellow posteriorly. Tegula greyishbrown. Legs light-grey with scattered dark scales, tarsi darker. Forewing length 8.5-9.5 mm

(n = 12), subtrapezoidal, with apex produced and falcate, and sinuate termen. In venation of tegumen and vinculum, ventral view; 7 – valvae, ventral view; 8 - aedeagus, lateral view. 9,

10 – female genitalia: 9 – ventral view, 10 – sternal part of VIII segment. 11 – comparison of relative length of coecum and aedeagus in Y. yasudai (upper) and Y. occultatella sp. n.

(lower). Scale bar for male and female genitalia 0.5 mm.

the forewing R 4 and R 5 are stalked, Cu 1 and Cu 2 are short–stalked from the angle. Costal part of forewing from costa to the fold dark greyish-brown, with yellow longitudinal basal spot and light-yellow small sport beyond 2/3 of wing length; white narrow indistinct line just below fold from the base to before the middle; the dark, almost black longitudinal sport at near 1/3 of forewing length; dorsal part of forewing greyish-yellow; dark-brown scales scattered along the wing. The apex of forewing with dark almost black scales. Fringe brown along the distal part of costa and termen, the basal scales along the latter light brown. Hindwing grey, with light-grey fringe. In venation of the hindwing M 2 and M 3 are remote. Abdomen brownish grey dorsally, with light brown scales terminally.

Male genitalia ( Figs 6–8 ). Uncus as rectangular plate, its width 2.5 times larger its length, with posterior margin angularly convex; socii 1.5 times longer than saccus, almost straight, with parallel sides on basal 2/3, tapering to pointed apex and slightly curved outwardly at distal 1/3. Gnathos with cup-shaped median plate, almost 2.5 times narrower than uncus width. Tegumen with a U-shaped median excision on anterior margin deeper than mid-length of tegumen, lateral lobes rounded anteriorly. Valva obovate, 2 times longer than maximal width, considerably narrowed to base, rounded distally; costa strong sclerotized,

reaching 2/3 of valvar length. Vinculum band-like, arched laterally, with saccus dilated to the apex. Aedeagus slightly curved beyond the middle, with coecum 1/4 as long as whole aedeagus, almost equal to middle part of aedeagus in width; cornuti as four long spines,

about 1/3 of aedeagus length.

Female genitalia ( Figs 9, 10 ). Papilla analis slightly sclerotized; ovipositor telescopic,

membrane between IX and VIII segments more than 4 times as long as VIII segment. Apophysis posterioris slender, reaching apex of papilla analis, thickened anteriorly, 4.2 times longer than apophysis anterioris; apophysis anterioris with Y–shaped base, it’s shorter and thinner branch strengthens anterior margin of VIII segment lateroventrally. Ventral sclerotization of VIII segment with two slightly diverging sclerotized bands, every with rounded lobe posteriorly, and bearing long setae on the apex. Ostium near posterior margin of VII segment; antrum cone-shaped, separated from ductus bursae by lateral narrowing and ring-

like sclerotization concave inward dorsally. Ductus bursae tubular, slightly longer than corpus bursae, dilated towards the corpus bursae; bulla seminalis much smaller than corpus bursae, with ductus seminalis shorter than bulla seminalis, arising from sclerotization of the ductus bursae. Corpus bursae with anterior inflation, membranous; signum at posterior 1/3 of corpus bursae, triangular anteriorly, with transverse ridge, and elongated into narrow band to the place where from ductus bursae arising.

DISTRIBUTION. Russia (south part of Far East).

ETYMOLOGY. The species name, occultatella , is derived from Latin occultatum, mea-

ning “hidden” and refers to the described cryptic new species.

Figures

Figs 2–5. Ypsolopha spp., adults. 2 – Y. occultatella sp. n., 3 – Y. yasudai, 4 – Y. falcella, 5

Figs 6–10. Ypsolopha occultatella sp. n., genitalia. 6–8 – male genitalia: 6 – uncus,