Nola lancangensis Yu & Hu, 2024

Yu, Yong & Hu, Yan-Qing, 2024, Four new species and two new records of Nola Leach, 1815 from China (Lepidoptera: Nolidae: Nolinae), Zootaxa 5477 (4), pp. 494-500 : 495-497

Nola lancangensis Yu & Hu sp. nov.

( Figs. 6–10 )

Type material. Holotype: male, Lancang county, 1384 m, Puer , Yunnan Prov., 23.vii.2023, leg. Yanqing Hu & Yong Yu. Paratypes: 5 males & 2 females, Puer , 1436 m, Yunnan Prov., 21.vii.2023, leg. Yanqing Hu & Yong Yu ; 3 males & 4 females, with the same data as the holotype .

Diagnosis. The new species belongs to the Nola astigma Hampson, 1894 species-group. Externally, the new species closely resembles Nola chienmingfui László, Ronkay & Ronkay, 2014 when compared with two other species of the group ( Nola astigma Hampson, 1894 and Nola fabiani László, Ronkay & Ronkay, 2014 ). However, there are distinct diagnostic differences that can be observed as follows. In the forewings, the new species has a uniform ground color and a straight postmedial line between vein R 5 and vein M 3, while N. chienmingfui has a distinct median fascia and a protruding postmedial line between vein R 5 and vein M 3. In the male genitalia, the new species has a small apex of the dorsal arm of valva, a thick and slightly S-shaped harpe, a small and approximately rounded sacculus, a cornutus on the vesica and the aedeagus without spine, while N. chienmingfui has a remarkably big and expanded apex of the dorsal arm of valva, a thin and gradually curved harpe, a long spine on the aedeagus and a vesica without cornuti. In the female genitalia, the new species has a rounded ductus bursae in the middle and a big and rounded corpus bursae with two signa, while N. chienmingfui has a cylindrical ductus bursae and a small and rounded corpus bursae with a signum.

Description. Adult ( Figs. 6, 9 ). Wingspan 13–14 mm. Head grayish white; antenna brown, bipectinate in the male, filiform in the female; labial palpus short, stretched forward, mostly covered with gray scales. Thorax covered with gray scales, collar covered with grayish brown scales.Abdomen brown. Forewing ground color grayish brown, the costal margin brown from the wing base to the antemedial line; the basal line undistinguished; the antemedial line black, thick, arc-shaped, formed a brown patch at outside before the cell; the medial line undistinguished; the postmedial line black, double line, thin, formed a brown patch at costal margin; the subterminal line pale blackish brown, wavy; the terminal line brown; cilia grayish black. Hindwing grayish brown; discal spot gray.

Male genitalia ( Figs. 7, 8 ). Uncus degenerated; tegumen thin and long; valva bilobate at the base, the dorsal arm almost as long as the ventral arm; the dorsal arm sclerotized at the costal margin, rounded at the apex; the ventral arm sclerotized at the ventral margin with a tiny spine at the apex; harpe sabre-shaped, apically pointed and slightly protruding; sacculus small, approximately rounded; saccus U-shaped. Aedeagus curved at the coecum; vesica with a cornutus, slender and spiraling.

Female genitalia ( Fig. 10 ). Papillae anales small; apophyses posteriores thin, longer than apophyses anteriores; ostium rounded; ductus bursae rounded in the middle, with a sclerotized band at the posterior part; corpus bursae rounded, with two signa, spiniform at one and banded at the other one.

Distribution. China (Prov. Yunnan).

Etymology. The species name is derived from the name of the type-locality, the Lancang county, Prov. Yunnan.

Figures

FIGURES. 1–10. Nola spp., adult habitus and genitalia. 1–5. Nola lufengensis sp. nov. 1. Male habitus (holotype); 2, 3. Male genitalia (holotype); 4. Female habitus (paratype); 5. Female genitalia (paratype). 6–10. Nola lancangensis sp. nov. 6. Male habitus (holotype); 7, 8. Male genitalia (holotype); 9. Female habitus (paratype); 10. Female genitalia (paratype).