Ancylosis plumbatella ( Ragonot, 1888 )

Ancylosis plumbatella ( Ragonot, 1888) View in CoL

( Figs 10 View FIGURES 5–10 , 15 View FIGURES 11–15 , 19 View FIGURES 16–19 )

Heterographis plumbatella Ragonot, 1888: 29 . TL: Achal-Tekke, Turkmenistan.

Ancylosis plumbatella ( Ragonot, 1888) View in CoL , Roesler 1973: 383.

Material examined. 3♂ 2♀, CHINA, Ningxia: Shapotou, Zhongwei , 1200−1391 m, 26, 29.VI.2021, 23.VII.2023, 13.VII.2024, leg. H Sun, ZL Tao, ZW Han & SY Tang, gen. slide Nos. GLZ24279 ♀, GLZ24280 ♂, GLZ24316 ♀, GLZ24356 ♂, GLZ24355 ♂.

Diagnosis. Ancylosis plumbatella is similar to A. gracilella ( Ragonot, 1887) . It can be distinguished by the more distinct broad arch-shaped antemedial line and the thin straight postmedial line of the forewing. The male genitalia of A. plumbatella are characterized by the cylindrical gnathos about 1/2 length of the uncus, the valva parallel-sided after the sacculus and the U-shaped vinculum rounded on the anterior margin. In A. gracilella , the beak-shaped gnathos is about 1/3 length of the uncus, the valva is broadened after the sacculus and the V-shaped vinculum is pointed on the anterior margin. The female genitalia of A. plumbatella are characterized by the triangular papillae anales rounded at apex, and the thin elliptical corpus bursae with numerous small cone-shaped spines. In A. gracilella , the triangular papillae anales are pointed at apex, and the corpus bursae is thin at posterior 1/3, broadened in anterior 2/3, and has larger cone-shaped spines. We have also discussed the differences between this species and A. byuni sp. nov. above.

Redescription. Adult ( Fig. 10 View FIGURES 5–10 ). Wingspan 17.5−23.5 mm.

Head. Vertex rounded, with pale yellow smooth scales, frons rounded. Antenna with scape pale yellow, 1.5 times as long as wide, flagellum with dorsal surface alternated with brown and white, ventral surface with cilia about equal length of diameter of flagellum in male, with white short cilia in female. Labial palpus pale yellow, stout, upturned and protruded over the head, segment II twice as long as segment III, segment III straight.

Thorax. Mesonotum, patagia, tegulae yellowish brown. Forewing elongate, 3 times as long as wide, with a widened white costal band mixed dark brown, about 1/3 width of forewing; antemedial line white, wide arched, inner side yellowish brown mixed with dark brown; postmedial line white, thin, edged with yellowish brown band on outer side, edged with dark brown line on inner side; discal cell yellowish brown mixed dark brown, two dark brown discal spots separated; terminal line dark brown; fringe pale yellow. Hindwing grayish yellow, terminal line dark brown, fringe long and pale yellow. Legs dark brown mixed with white on outer surface, white on inner surface.

Abdomen. Brown.

Male genitalia ( Fig. 15 View FIGURES 11–15 ). Uncus triangular, twice as long as basal wide, apex rounded. Gnathos thin and curved, about 1/2 length of uncus. Valva 4 times as long as wide, rounded at apex; with a small hamp under the costa; costa band-shaped, about 1/4 width of valva, reaching tip of costal margin of valva; sacculus banded, about 1/2 length of valva. Juxta U-shaped, length and width nearly equal. Vinculum U-shaped, 1.2 times as long as wide, anterior margin rounded. Eighth sternum with arc-shaped anterior margin thickened medially. Aedeagus tubular, widened basally, thinner distally.

Female genitalia (fig. 19). Papillae anales triangular, 1.3 times as wide as long with concave apex. Eighth tergum sub-quadrate, 1.2 times as long as wide, anterior margin convex, posterior margin straight. Apophyses anteriores and posteriores equal in length.Antrum small, funnel-shaped. Ductus bursae slender membranous, shorter than corpus bursae. Corpus bursae elliptical, thin at anterior and posterior 1/4, and anterior thin portion wrinkled, cone-shaped spines gathered at medial broader portion of corpus bursae.

Distribution: China ( Ningxia). Afghanistan, Arabia.

Note. This species is newly recorded from China and the male of this species is described for the first time.