Neostatherotis spinosa Ma & Yu, 2024

Ma, Shuang, Hu, Zhurong, Dong, Ruiqin, Zhang, Bingyi & Yu, Haili, 2024, The checklist of the tribe Olethreutini (Lepidoptera: Tortricidae) of Qinghai-Tibet Plateau, Zootaxa 5541 (4), pp. 455-484 : 469-471

45. Neostatherotis spinosa Ma & Yu , sp. nov.

( Figs. 5 , 6 )

Type material. Holotype: ♂, [ CHINA] Tibet: 80K (29.66°N, 95.49°E), Zhamu Highway , Motuo County, 2076 m, 7.VIII.2018, leg. Mujie Qi and Xiaofei Yang, genitalia slide no. FWX18150 . Paratypes: 6♂, same data as holotype except alt. 2059–2076 m, 28.VII–7.VIII.2018 .

Diagnosis. Up to now, there are seven species known in the genus of Neostatherotis , which are distributed in East Asia and Southeast Asia ( Oku 1974; Kuznetzov 2001; Razowski 2009; Luo et al. 2015). This new species is externally similar to N. angustata Luo, Fei & Yu, 2015 from Nanling Mountains in South China, but can be distinguished by the following male genital features: tegumen broadened terminally and with a rounded top, valva with a spined neck, and cucullus longer than sacculus. While in N. angustata , the tegumen is uniform in width and straight distally, the neck of valva is nearly naked, and the cucullus is approximately equal to sacculus in length. The male genitalia of this new species is also similar to those of N. psilata Luo, Fei & Yu, 2015 from Nanling Mountains in South China and N. pallidtornus Razowski, 2009 from Vietnam, but can be easily distinguished by the uncus longer than socius, narrow neck of the valva, and a small, ventral prominence on the sacculus. In the latter two species, the uncus is shorter than the socius, the neck of the valva is more than 4/5 of the cucullus in width, and the sacculus has no ventral prominence.

Description. Adult ( Fig. 5A ). Forewing length 22.0–23.0 mm. Head ( Fig. 5B ): Frons tawny; vertex roughly scaled, tawny suffused with fuscous posteriorly.Antenna reaching midlength of forewing, tawny dusted with fuscous dorsally. Labial palpus ascending, pale tawny; median segment not expanded, terminal segment small, rounded.

Thorax: tawny brown mixed with darkend fuscous medially and posteriorly; posterior crest distinct. Hind tibia ( Fig. 5C ) in the male slightly enlarged, with one white hair pencil at base. Forewing oblong, nearly rectangular, costa with basal half slightly curved, distal half nearly straight, apex blunt, termen oblique; upperside ground color yellowish creamy, suffused with ocherous, markings blackish fuscous dusted densely with ocherous, mottled, with indistinct edges; costal strigulae white, basal four pairs distinct, leaden striae from them scattered on basal half of the wing, distal five pairs of costal strigulae narrow, dull white, leaden striae from them distinct, forming waved lines; basal fascia narrow, extending to base of dorsum; subbasal fascia indistinct, indicated by a laying V-shaped stripe, extending from costa and protruding at midlength of lower edge of cell, reaching base of dorsum; costal strigulae three and four broad, extending obliquely to distal part of the cell, forming a striking white blotch, lower part slightly narrowed, inserted with a short blackish fuscous line below distal part of the upper edge of the cell; median fascia an oblique band, extending from midlength of costa to end of dorsum, concaved at distal part of the cell, interfered by leaden striae from costal strigulae five and six on lower angle of cell; these striae protruding at upper angle of the cell and divided into two parts below base of M 2, the inner part reaching dorsum between 1/2 and 3/4 length, the outer part reaching tornus; postmedian fascia oblique, extending tornus, densely suffused with ochreous below costa and before tornus, proximal edge concaved at base of R 5 and 4/5 length of CuA 1, protruding to 1/4 length of M 2 and nearly meeting with median fascia, fringed with white terminal edge protruding to 2/3 length of R 4 and then slightly waved; sriae from distal three pairs of costal strigulae extending to the parts of termen between M 1 and M 2 and between M 3 and CuA 1, respectively; preterminal fascia a narrow curved stripe, pale fuscous, extending to termen on M 2; terminal fascia a narrow stripe, extending along termen to M 1; cilia fuscous mixed with ocherous; underside deep fuscous, costal strigulae pale fuscous suffused with yellow, pale yellow suffused with pale fuscous under the white blotch. Hindwing upperside fuscous, white on area of forewing overlap; cilia pale fuscous with fuscous baseline; underside pale fuscous.

Abdomen: Male genitalia ( Fig. 6 ) with tegumen high, slightly broadened posteriorly, rounded terminally. Uncus elongate triangular, sparsely spined. Socius a drooping lobe, elongate-ovate, shorter than uncus, densely hairy. Gnathos narrow band, weakly sclerotized. Valva slender; basal excavation drop-shaped; most of sacculus densely with short spines, an inconspicuous small blade-like projecting triangular process on middle of ventral edge; neck distinct, narrow, with short spines; cucullus densely spined, broadened, orange slice-like, nearly two times neck in width. Phallus short, tapered, moderate in width, sharp apically, without cornuti. Female unknown.

Etymology. The specific name is derived from the Latin spinosus (= spine), and refers to the feature of the valva in the male genitalia.

Figures

FIGURE 5. Adult of Neostatherotis spinosa sp. nov. A. Wing pattern; B. Head (holotype); C. Hind tibia of the male (holotype). (scale bars: 2 mm).

FIGURE 6. Male genitalia of Neostatherotis spinosa sp. nov. (holotype, slide no. YWX18277). (scale bars: 1 mm).