Fignya trigonum, Wu & Han, 2024

Wu, Jun & Han, Huilin, 2024, A taxonomic review of the genus Fignya Solovyev & Witt, 2009 (Lepidoptera, Limacodidae) with descriptions of three new species and one new combination, ZooKeys 1213, pp. 225-235 : 225-235

Fignya trigonum sp. nov.

Figs 2 , 9 , 10 , 20

Type material.

Holotype: China • ♂, Yunnan Province, Zhaotong City, Xiaocaoba Town, Yutang Village , 1864 m, 16. vii. 2023, RT Xu & MX Han leg., genit. prep. WuJ-1136-1 , in NEFU.

Paratypes: China • 2 ♂, same data as for holotype, genit. prep. WuJ-1111-1 , 1112-1, all in NEFU .

Diagnosis.

F. trigonum sp. nov. (Fig. 2 ) is closest to F. qiana sp. nov. (Fig. 1 ) both in appearance and male genitalia. The differences between the two have been listed in the diagnosis section of F. qiana sp. nov. The most significant difference in male genitalia from the other two species, F. melkaya (Fig. 11 ) and F. ravalba (Fig. 12 ), are that the new species has an obviously protruding inner side of the cucullus, a well developed thick and long horn-like cornutus at the base of the vesica, and a triangular sclerite. In contrast, the inner side of the cucullus in F. melkaya and F. ravalba is smooth, and the developed horn-shaped basal cornutus and triangular sclerite are absent.

Description.

Male. Adult. Forewing length 7.5–8.0 mm, wingspan 16.6–18.0 mm (N = 3). Antennae filiform, brown. Labial palpi upcurved, light brown. Head and thorax grayish-white with a tinge of brown; abdomen grayish-white to light brown, terminal with grayish-white to light brown scale tuft. Forewing grayish-brown with a series of serrated reddish-brown to dark brown, serrated transverse lines, among which the antemedial line distinct, dark brown, zigzag; medial and postmedial areas of forewing, and tornus brown to dark brown, with two large, white, oval spots with black scales around the edges and a series of indistinct small circular spots near tornus, and a small, indistinct, white dot located at the end of discal cell; postmedian line grayish-white, extending from c. 3 / 5 of the costal margin from the wing base to tornus; terminal area black, mixed with some brown and white scales. Fringe grayish-brown with a tinge of dark brown. Hindwings reddish-brown, with dark brown scales mixed in the costal and inner margin areas; fringe pale yellow.

Male genitalia. Uncus short, pointed apically. Gnathos flat, fish-tail-shaped, comb-like distally. Valva narrow and long, swollen at the base, parallel-sided in the middle; inner side of the cucullus slightly protruding; basal part of valva with a near-elliptical, sclerotized plate, which is densely covered with long bristles laterally; sacculus slightly swollen. Juxta flat, with a pair of slender, sclerotized lateral processes. Saccus long, broad at the base, gradually narrowing to the end, rounded terminally. Phallus tube-shaped, sclerotized at terminal part. Vesica with 3 diverticula, bearing 3 cornuti; basal diverticulum with a strongly sclerotized, slightly curved, long, large cornutus, and with a sclerotized triangular sclerite next to it; medial and apical diverticula each with one strongly sclerotized, nail-shaped cornutus.

Female genitalia. Unknown.

Phenology and habitat.

The type specimens were collected in July at an altitude of c. 1864 m. The collection site is located in a high mountainous area, surrounded by various types of broad-leaf trees. The ground cover consists of herbs and small shrubs (Fig. 17 ). The immature stages are still unknown.

Distribution.

China (Yunnan).

Etymology.

The new species name is derived from the Latin “ trigonum ”, meaning triangle, referring to a unique sclerotized triangular sclerite at the base of vesica.

Figures

Figures 1–6. Adults of Fignya spp. Depositories of the specimens 1–2, 4–6 in NEFU 3 in MWM / ZSM. Scale bars: 5 mm.

Figures 7–15. Male genitalia of Fignya spp. Depositories of the slides 7–10, 12–15 in NEFU 11 in MWM / ZSM. Scale bars: 1 mm, except unscaled Fig. 11.

Figures 16–20. Biotope and living habitus 16, 18–19 F. qiana sp. nov., the collecting site is Xingren City, Guizhou Province, China; 17, 20 F. trigonum sp. nov., the collecting site is Zhaotong City, Yunnan Province, China.