Euhyponomeutoides Gaj, 1954

Genus Euhyponomeutoides Gaj, 1954 View in CoL

Euhyponomeutoides Gaj, 1954: 11 View in CoL .

Type species: Euhyponomeutoides albithoracellus Gaj, 1954 , by original designation.

DISTRIBUTION. Europe, Russia (European part, south of West Siberia, Zabaikalskii Krai, Far East), Transcaucasia, China ( Sichuan, Jiangxi), South Korea, Japan ( Hokkaido, Honshu, Kyushu), N India ( Himachal Pradesh, former East Punjab) and North America ( Canada, USA) ( Moriuti, 1977; Park, 1983; Sohn et al., 2010; Hirowatari, 2013; Lewis & Sohn, 2015; Ponomarenko, 2016; Landry & Pohl, 2018; Ponomarenko & Sinev, 2024).

REMARKS. Currently the eight species belong to this genus, including a new species (Lewis & Sohn, 2015). Five species are distributed in Palearctic region and three of them inhabit the Russian Far East: E. albithoracellus Gaj , E. trachydelta (Meyrick) and E. kangauziensis sp. n.

Euhyponomeutoides kangauziensis Tarasova et Ponomarenko , sp. n. https://zoobank.org/NomenclaturalActs/ 1889527E-421F-4936-8B49-EF9840BBD30A

Figs 1, 2 View Figs 1–5 , 6–10 View Figs 6–10 .

TYPE MATERIAL. Holotype – ♀, Russia: Primorskii Krai , Shkotovskii distr., 6 km SW of Anisimovka vill., 43°07'28" N, 132°47'42" E, h = 480 m, 15.V 2018, M.G. Ponomarenko leg. (GS 341 AT, BC FSCB). GoogleMaps

DIAGNOSIS. The new species differs from congeners by strongly expanded ventral arms of apophyses anteriores into rounded in shape and concave sclerites fused medially; angular setaceous lobes of the postvaginal plate; position of ostium slightly caudal of posterior margin of segment 7 and wide ductus bursae with granulated inner surface in the female genitalia.

DESCRIPTION. Adult female ( Figs 1, 2 View Figs 1–5 ). Wingspan 18 mm, forewing length 8.5 mm. Head covered with raised yellowish-beige scales. Labial palpus slightly curved up in proximal part and directed forward in distal part; first segment 2 times shorter than second segment, second and third segments almost equal in length; first and second segments beige, third segment beige on inner side and at apex, its basal 2/3 with scuttered dark-brown scales on outer and upper sides ( Fig. 2 View Figs 1–5 ). Antennal scape brownish grey on the upper side and light beige on underside, flagellum brownish grey and 4/5 of wing length. Thorax beige, tegula grey at basal 2/3 and light beige distally. Forewing narrow, elongated, with stretched and pointed apex; yellowish beige, with brownish costal edge at the basal 1/3, dark dot near outer margin at about 3/5 wing length and with three indistinct longitudinal lines of ochre colour and extend along the costal edge, in the middle and in anal fold of wing; fringe concolorous with forewing ( Fig. 1 View Figs 1–5 ). Hindwing grey, with concolorous fridge. Legs yellowish beige.

Second abdominal sternite with a W–shaped deepening of unknown function. Apodemes well-developed, almost 6 times shorter than second sternite, venulae almost reach posterior edge of sternite and curved medially in distal 1/8 ( Fig. 10 View Figs 6–10 ).

Female genitalia ( Figs 6–9 View Figs 6–10 ). Ovipositor relatively short, membrane between 9th and 8th abdominal segments approximately equal to length of papillae anales. Posterior margin of segment 8 with deep notch, which extending beyond middle of segment. Apophysis posterioris 2.4 times longer than not bifurcated part of apophysis anterioris. Ventral arms of both apophyses anteriores expanded in sternal area into rounded concave sclerites, which fused medially forming transverse sternal sclerotisation covered with microtrichia ( Figs 6, 8 View Figs 6–10 , 11 View Figs 11, 12 ). The posterior margin of the sternal sclerotisation with deep notch. Two angular lobes with long setae placed caudally of transverse sclerotisation. Ostium large and rounded, its diameter equal with that of each rounded concave sclerite. Antrum short, semi-sclerotised and fused with anterior margin of sternal sclerotisation by posterior margin of dorsal side; its posterior part with microtrichia on inner surface. Two longitudinal semi-sclerotised folds extend forward along sides of antrum, right one of which considerably larger and with two strands reaching the ductus bursae ( Fig. 7 View Figs 6–10 ). Ductus bursae with narrowing between short antrum and rest part; gradually widened towards corpus bursae; in distal part twice as wide as antrum; with granulated inner surface for excepting short part before place of ductus seminalis arising ( Fig. 9 View Figs 6–10 ). Base of ductus seminalis and caudal left part of corpus bursae also with granulated inner surface. Corpus bursae indistinctly separated from ductus bursae, about 8,5 times longer than ductus bursae, membranous, without signum.

Male. Unknown.

MORPHOLOGICAL NOTES. In appearance, E. kangauziensis sp. n. is similar to the European E. ribesiella (de Joannis, 1900) and East Asian E. namikoae Moriuti, 1977 by monochromatic groundcolour and pattern of forewings with dark costal margin basally and single dot near outer margin approximately at 3/5 of wing length. Generally, the new species and E. namikoae are similar by morphology of female genitalia, but have different position and shape of genital structures. In new species the posterior margin of rounded concave sclerites formed by expanded ventral arms of anterior apophyses with deep notch medially and their position distaller than posterior margin of antrum dorsal side ( Fig. 11 View Figs 11, 12 ). In the E. namikoae the posterior margin of the same sclerotisation placed anterad the posterior margin of antrum dorsal side ( Fig. 12 View Figs 11, 12 ). The distal lobes of postvaginal plate small and angular in new species, their posterior edge not exceed the middle of segment 8. The distal lobes of postvaginal plate stretched caudally in E. namikoae and their apices placed at the level of 3/4 of 8th segment.

REMARKS. Within the framework of used terminology for genital structures in Lepidoptera , described transverse sternal sclerotisation in the female genitalia, formed by expanded ventral arms of anterior apophyses in sternal region of segment 8, should be considered as postvaginal plate ( lamella postvaginalis). This transverse sclerotisation is a characteristic feature of this genus. As for the lobes of the postvaginal plate bearing long setae, that is similar with female genitalia of other yponomeutoid species.

HOST PLANT. Unknown.

DISTRIBUTION. Russia (south of Far East: Primorskii Krai).

ETYMOLOGY. The name of the new species is derived from old name of the settlement Kangauz [Anisimovka], where a type specimen was collected.