Westermannia pseudonobilis Qin & Han, 2025

Qin, Yue, Zhang, Chao & Han, Huilin, 2025, Descriptions of two new species associated with Westermannia nobilis Draudt, 1950 (Lepidoptera, Nolidae, Westermanniinae) from China, ZooKeys 1262, pp. 21-31 : 21-31

Westermannia pseudonobilis Qin & Han sp. nov.

Figs 1 , 2 , 9 , 12 , 15

Type material.

Holotype: • male, China, Yunnan, Weixi, Weideng Town, Xinhua Village , 29. VII. 2024, leg. Y. Y. Jin, genit. prep. QY- 34, NEFU . Paratypes: • 2 females, China, Yunnan, Weixi, Baijixun Town, Nuoge Village , 30. VII. 2024, leg. Y. Y. Jin, genit. prep. QY- 33 and 75, NEFU • 1 female, CHINA, Yunnan, Weixi, Baijixun Town, Haizan Village , 2. VIII. 2024, leg. Y. Y. Jin, genit. prep. QY- 35, NEFU .

Diagnosis.

This species is closely related to W. simianshana Qin, Zhang & Han , sp. nov. and W. nobilis Draudt but differs as follows: generally darker in overall colour; the outwardly arcuate median portion of the postmedial line on the forewing is more acute. In the male genitalia, the sclerotized plate at the base of the uncus is smaller and elliptical; the valva is broader, with minute denticles along the costa; the vesica bears a spiral band of cornuti extending from base to apex. In the female genitalia, the ductus bursae has a sclerotized binding ring at the base, overall sinuous but untwisted, and the corpus bursae is ellipsoidal and lacking an appendix bursae. Additionally, this species has currently only been recorded in Yunnan Province.

Description.

Adult (Figs 1 , 2 ). Wingspan 30.0–30.5 mm. Head mainly white. Antennae filiform, basal portion faintly whitish, remainder dark brown. Thorax with dorsum, tegula, and patagium khaki, densely pubescent. Abdomen greyish-white, apical portion greyish-brown, anal tuft khaki. Forewing silvery greyish-brown on costal, basal, and postmedian areas, gradually paler from inner margin to costal margin; median area and outer 1 / 3 dark brown; a longitudinal khaki band tinged with fuscous along inner margin, extending from base to tornal angle, upper margin straight; a 8 - shaped filiform and pale lines in the median line area, Cu veins pale; reniform spot dark brown, wedge-shaped, foam pale, radiating bright white at the rear; postmedial line white, slender, strongly excurved at M 3 - Cu 2; subterminal line represented by 4–5 faintly white-edged small spots near the costal margin; fringe dark brown, apically paler; terminal line and median line areas dark brown, other parts lighter. Hindwing predominantly greyish-white, outer margin 1 / 3 suffused with brown, females darker than males; venation distinct; fringe desert grey.

Male genitalia (Fig. 9 ). Uncus elongate, nail-shaped, acute apically, surrounded by brush of coarse setae, base covered with an oval sclerite. Tegumen narrowly lingulate, approximately twice the length of uncus. Vinculum narrow, V-shaped, saccus short, weakly developed. Juxta trumpet-shaped, weakly sclerotized. Valva broadly oblong, dorsal margin serrulate with minute teeth; cucullus rounded, scattered with distinct punctures; costa strip-shaped, basal 3 / 4 slightly raised, distal 1 / 4 with a prominent hill-shaped protrusion; sacculus relatively flat, basally slightly protruding outward, then weakly curved, densely covered with long hairs. Aedeagus cylindrical, slightly sigmoidally curved, basal 1 / 5 covered with granules; coecum swollen; carina moderately sclerotized. Vesica tubular, nearly equal in length to aedeagus, basal 2 / 3 similar in diameter to aedeagus, distal 1 / 3 gradually tapered and dorsally recurved; a helical band of cornuti originating from ventro-basal region, cornuti spine-like, heavily sclerotized, increasing in size and becoming sparser from base to apex.

Female genitalia (Fig. 12 ). Papillae anales broadly flattened, short, strip-shaped, densely setose apically. Apophysis anterior and posterior slender, subequal in length. Ostium bursae shallowly funnel-shaped. Ductus bursae sinuous, robust, chute-shaped in outline, moderately sclerotized at middle part, with a strongly sclerotized ring at base. Corpus bursae ellipsoidal, nearly equal in length to ductus bursae, surface wrinkled, bearing a pair of spiny-fusiform signa at ductus-corpus bursa junction.

Distribution.

China ( Yunnan).

Etymology.

The specific epithet of this species is derived from that of the similar species W. nobilis , and because of its morphology similar to that of the latter, it is named pseudo - (meaning “ false ”) + nobilis .

Figures

Figure 15. Distribution map and type localities of three Westermannia species in China.

Figures 1–8. Adults of Westermannia spp. (1, 3, 5, 7: male; 2, 4, 6, 8: female). 1, 2. W. pseudonobilis Qin & Han, sp. nov., coll. NEFU (1: holotype; 2: paratype); 3, 4. W. simianshana Qin, Zhang & Han, sp. nov., coll. NEFU (3: holotype 4: paratype); 5–8 W. nobilis Draudt, 1950, collected from Guangxi (5), Hunan (6), and Chongqing (7–8), China, coll. NEFU. Scale bar: 5 mm.

Figures 9–11. Male genitalia of Westermannia spp. (a: tegumen-vinculum; b: aedeagus). 9. W. pseudonobilis Qin & Han, sp. nov., genit. prep. QY- 34, coll. NEFU; 10. W. simianshana Qin, Zhang & Han, sp. nov., genit. prep. QY- 90 (a) and 36 (b), coll. NEFU; 11. W. nobilis Draudt, 1950 (with close-up of the processes on costa), genit. prep. QY- 50 (51 for close-up), coll. NEFU

Figures 12–14. Female genitalia of Westermannia spp. with close-up of the signa. 12. W. pseudonobilis Qin & Han, sp. nov., genit. prep. QY- 33 (75 for close-up), coll. NEFU; 13. W. simianshana Qin, Zhang & Han, sp. nov., genit. prep. QY- 91 (45 for close-up), coll. NEFU; 14. W. nobilis Draudt, 1950, genit. prep. QY- 52, coll. NEFU.