Issikiopteryx rotundiconcava Fan & Li

Fan, Ximei & Li, Houhun, 2008, The genus Issikiopteryx (Lepidoptera: Lecithoceridae): Checklist and descriptions of new species, Zootaxa 1725, pp. 53-60 : 58-60

Issikiopteryx rotundiconcava Fan & Li , sp. nov.

( Figs. 1 c, 4a–c)

Type material. Holotype: ɗ, China: Mabian (28°51'N, 103°31'E), Sichuan Province, 1500 m, 23.vii.2004, coll. Yingdang Ren, genitalia slide No. ZYM06229. Paratypes: 1 Ψ, 1200 m, 22.vii.2004, other data same as for holotype; 3 Ψ, Baoxing County (30°22'N, 102°50'E), Sichuan Province, 1600 m, 2–3.viii.2004, coll. Yingdang Ren.

Diagnosis. This species can be recognized from other congeners by the juxta with caudal processes widely spaced and pointed, and the eighth sternite with asymmetrical caudal processes in the male genitalia; the posterior margin of lamella antevaginalis roundly concave at middle and bearing several teeth in the female genitalia.

Description. Adult ( Fig. 1 c): Wing expanse 13.0–14.0 mm. Head with vertex shiny pale grayish white, frons shiny white. Labial palpus pale yellow, slightly whitish on inside of second segment. Antenna yellowish gray, black on distal end. Thorax orange yellow. Tegula with basal half ferrugineous, distal half deep grayish brown. Forewing with termen straight; ground color yellow to orange yellow; costal margin brownish yellow; a small black dot at base anteriorly; a large, ovate silvery gray blotch situated at basal 1/3, surrounded by dark yellowish brown scales, its inside somewhat sinuate; distal half with longitudinal deep yellowish streaks extending respectively from below costal margin, along middle of cell and from posterior margin to near apex, forming a large blotch nearly occupying distal 1/3; another short streak below costal one extending from distal 1/4 to join the large blotch; cilia pale gray. Hindwing and cilia whitish yellow. Legs whitish yellow, hind tarsus black on distal end. Abdomen yellow on dorsal surface, white on ventral surface.

Male genitalia ( Fig. 4 a): Uncus lobe widened distally. Gnathos narrow and long, hooked distally. Valva with basal 2/3 somewhat triangular, wide at base, narrowed to 2/3; cucullus irregular oval, widened medially, rounded at apex, bearing numerous broad and short spines ventrally, ventral half armed with numerous short spines or teeth medially; costal bar almost straight, about 1/3 length of costa. Sacculus relatively narrow, longer than half length of valva. Juxta anteriorly rounded, narrow at base, widened to about 2/3, then suddenly shrunk and parallel-sided to posterior margin, with a pair of slender, widely spaced and pointed caudal processes. Aedeagus more or less thick at base, then slightly narrowed and nearly parallel-sided to near apex; with two lobes distally: dorsal lobe short and rounded, ventral one longer and slender; cornuti composed of about eleven strong, broad-based spines.

Eighth sternite ( Fig. 4 b): Caudal processes short and pointed; asymmetrical, one longer than the other.

Female genitalia ( Fig. 4 c): Papillae anales elongate oval. Apophyses posteriores about twice as long as apophyses anteriores, slightly expanded distally. Lamella antevaginalis broad, deeply concave at middle on posterior margin, with several caudal teeth. Antrum indistinct. Ductus bursae thick, heavily sclerotized except distal portion, with numerous small and large, densely arranged spines. Corpus bursae small, oval, shorter than half length of ductus bursae, spinulate inside; signum large, placed posteriorly, irregularly triangular, with a carina along anterior margin.

Distribution. China (Sichuan).

Etymology. The specific name is derived from the Latin prefix rotund- and the Latin word concavus, referring to the lamella antevaginalis roundly concave at middle on posterior margin.

Figures

FIGURE 1. Adults of Issikiopteryx spp. a, I. valvispinata Fan & Li, sp. nov.; b, I. obtusangula Fan & Li, sp. nov.; c, I. rotundiconcava Fan & Li, sp. nov.

FIGURE 4. Issikiopteryx rotundiconcava Fan & Li, sp. nov. a, male genitalia; b, male eighth sternite; c, female genitalia