Chrysoteuchia nonifasciaria Li & Li

Li, Houhun & Li, Weichun, 2010, Four new species of the genus Chrysoteuchia Hübner (Lepidoptera: Crambidae: Crambinae) from China, Zootaxa 2485, pp. 33-46 : 36-38

Chrysoteuchia nonifasciaria Li & Li , sp. n.

( Figs. 4 , 8 , 11 )

Type material. Holotype ɗ, China: Laka (29°40΄N, 88°39΄E), Mêdog, Xizang (Tibet) Autonomous Region, 3300 m, 8.viii.2003, leg. Xinpu Wang and Huaijun Xue, genitalia slide No. LWC08443. Paratype: 1 Ψ, same data as holotype.

Diagnosis. This species resembles C. gonoxes ( Bleszynski, 1962) in the wing pattern and genitalia. It can be distinguished from C. gonoxes by the absence of the subterminal fascia on the forewing; the costa bearing an ovate basal protuberance, and the straight apical spine of phallus in the male genitalia; the lamella postvaginalis with two small triangular protuberances at middle on posterior margin, and the corpus bursae with a signum in the female genitalia. While in C. gonoxes , the subterminal fascia is present; the costa bears a triangular basal protuberance, and the apical spine of phallus bends towards base of the phallus; the lamella postvaginalis bears a rounded protuberance at middle on posterior margin, and the corpus bursae has two signa.

Description. Adult ( Fig. 4 ): Forewing length 12.0–13.0 mm. Frons white, mixed with pale yellow in posterior half. Labial palpus with inner side and dorsal surface white; outer side and ventral surface pale yellow except first segment white at base. Maxillary palpus pale yellow except white distally. Antenna blackish brown, ciliated with white ventrally. Patagium pale yellow except white medially. Tegula pale brown except yellowish white posteriorly. Thorax pale yellow on dorsal surface, white on ventral surface. Forewing ground colour white, densely covered with pale yellow scales, suffused with black scales along dorsum; medial area in female with longitudinal black stripes at anterior one third from costa and posterior one third from dorsum respectively, the latter shorter; white stripe situated outside of anterior stripe; stripes in male inconspicuous; termen with seven evenly spaced black spots; cilia with yellowish white basal line, followed by pale brown; distal two thirds pale yellow. Hindwing yellowish white, sparsely suffused with pale brown scales in anterior half from costa; cilia yellowish white. Legs white on inner side, pale yellow on outer side, black at apices of tibiae.

Male genitalia ( Fig. 8 ): Uncus long and thin, curved downward slightly, blunt at apex. Gnathos three fourths length of uncus, nearly straight, pointed apically. Tegumen about twice as long as gnathos. Valva with basal three fourths nearly parallel sided, distal one fourth narrowed gradually to rounded apex; costa with irregularly ovate protuberance in basal one third, inner side of protuberance situated small thumblike process, distal half of protuberance with longitudinal sclerotized pleat in middle. Sacculus narrow basally, broadened gradually to apex; distal prong large triangular, reaching upward to 3/5 of costa. Pseudosaccus small, thumbshaped. Saccus broad, concave at middle anteriorly. Juxta ovate. Phallus long and thin, nearly straight, slightly shorter than valva, with short and thick, straight apical spine; cornutus absent.

Female genitalia ( Fig. 11 ): Tergite VIII coalescent with antrum. Lamella postvaginalis developed, slightly broader than antrum, medially with sclerotized ovate plate, with two small triangular protuberances posteromedially, with long spine posterolaterally. Antrum strongly sclerotized, about one and half times as thick as median part of ductus bursae, armed with sclerotized longitudinal pleats, with transverse and waved pleat anteriorly. Ductus bursae straight, membranous; ductus seminalis arising from posterior third of ductus bursae. Corpus bursae ovate; signum small and rounded, placed medially.

Distribution. China (Xizang).

Etymology. The specific name is derived from the Latin prefix non- = without, and the Latin fasciarius = zonary, in reference to the absence of fascia in the forewing.

Figures

FIGURES 3 – 6. Adults of Chrysoteuchia spp. 3. C. rotundiprojecta sp. n., holotype, male; 4. C. nonifasciaria sp. n., paratype, female; 5. C. furva sp. n., holotype, male; 6. C. shafferi sp. n, holotype, male.

FIGURES 7 – 10. Male genitalia of Chrysoteuchia spp. 7. C. rotundiprojecta sp. n., holotype, genitalia slide No. LWC 07019; 8. C. nonifasciaria sp. n., holotype, genitalia slide No. LWC 08443; 9. C. furva sp. n., holotype, genitalia slide No. LWC 08450; 10. C. shafferi sp. n., holotype, genitalia slide No. LWC 08447 (scales: 0.5 mm).

FIGURES 11 – 13. Female genitalia of Chrysoteuchia spp. 11. C. nonifasciaria sp. n., paratype, genitalia slide No. LWC 08396; 12. C. furva sp. n., paratype, genitalia slide No. L 93005; 13. C. shafferi sp. n., paratype, genitalia slide No. L 93021 (scales: 0.5 mm).