Gargela polyacantha Li, 2019

Yang, Jingbo, Jie, Lulan & Li, Weichun, 2019, Notes on the genus Gargela (Lepidoptera: Crambidae) ı with descriptions of two new species from China, Journal of Natural History 53 (33), pp. 2099-2104 : 2099-2104

Gargela polyacantha Li , sp. nov.

( Figures 1 – 2 and 5 – 6 )

Holotype

Male, CHINA: Yunnan Province, Xishuangbanna Dai Autonomous Prefecture , Mengla County (21°29´N, 101°33´N), 27 October 1979, coll. Yujian Lin, prep. gen. no. LW11018.

Paratypes

Three males, Three females, same data as the holotype, except date 26 – 27 October 1979, genital prep. no. LW11058; Four males, one female, CHINA: Guizhou Province, Mayanghe Nature Reserves (28°37 ′ N, 108°18 ′ E), ca. 700 m a.s.l., 26 August 2012, coll. Weichun Li , genital prep. no. LW11017 .

Diagnosis

This new species is similar to Gargela hainana Song, Chen & Wu, 2009 with the valva concave at distal part of ventral margin, the distal projection of costa exceeding the apex of valva in the male genitalia. But it can be distinguished by the dorsally convex costa, the juxta is oblong and the phallus with many tiny spine-like cornuti in the male genitalia ( Figure 5 ), and the basal half of ductus bursae covered with dense tiny spines in female genitalia ( Figure 6 ). In G. hainana , the male genitalia has a nearly straight costa, a V-shaped juxta and a row of cornuti ( Song et al. 2009, p. 47, figure 17), and the female genitalia without spines in the ductus bursae ( Song et al. 2009, p. 47, figure 28).

Description

Adult ( Figures 1–2 ). Forewing length 4.5 – 5.0 mm. Frons and vertex silvery white. Labial palpus distal tip exceeding vertex; silvery white, first and second segments pale brown dorsally. Maxillary palpus silvery white except first segment pale brown. Antenna scapus white mixed with brown; flagellomere silvery white on dorsal surface, pale brown on ventral surface. Patagium, thorax and tegula white. Forewing silvery white; medial line pale brown, convex at costal one-third; subterminal line pale brown mixed pale yellow, convex at costal one-third and bent inwards at dorsal two-fifths; marginal area suffused with three pale yellow longitudinal fasciae along veins and one blackish brown spot between M3 and Cu1; apex silvery white with blackish brown termen, with golden oblique stripe; cilia silvery white mixed with pale yellow. Hindwing white; cilia white. Abdomen pale brown, distally white.

Male genitalia ( Figure 5 ). Uncus curved downward, tapering to pointed apex. Gnathos curved upward slightly, distally pointed. Tegumen about three times as long as gnathos. Valva broad basally, narrowed towards blunt apex; distal one-third concave on ventral margin. Costa strongly sclerotised, dorsally convex at approximately middle, distal half tapering to strongly incurved spine-like projection, distal tip exceeding apex of valva. Juxta oblong, distally with two thumb-like projections. Phallus nearly as long as valva; cornuti composed of many small spines.

Female genitalia ( Figure 6 ). Papillae anales nearly as long as apophysis posterior. Tergite eight approximately half as long as apophysis anterior. Ductus bursae long and thin, basal half slightly sclerotised and covered with dense tiny spines. Corpus bursae ovate, with two thorn-like signa.

Distribution

China (Guizhou, Yunnan).

Etymology

The specific name is derived from the Latin polyacanthus = spinous, in reference to the species has many spine-like cornuti in the phallus and with dense spines in the ductus bursae.

Figures

Figures 1–4. Adults and heads of Gargela spp. 1–2. G. polyacantha Li, sp. nov.: 1. Adult, paratype, female; 2. Head in lateral view, paratype, male; 3–4. G. grandispinata Li, sp. nov.: 3. Adult, paratype, male; 4. Head in lateral view, paratype, male.

Figures 5–7. Genitalia of Gargela spp. 5–6. G. polyacantha Li, sp. nov.: 5. Holotype, male, genital prep. no. LW11018; 6. Paratype, female, genital prep. no. LW11058; 7. G. grandispinata Li, sp. nov., holotype, male, genital prep. no. LW19073. Scale bars: 0.5 mm.