Chrysoteuchia rotundiprojecta 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 : 34-36

Chrysoteuchia rotundiprojecta Li & Li , sp. n.

( Figs. 3 , 7 )

Type material. Holotype ɗ, China: Dangchuan Forestry Center (34°22΄N, 106°09΄E), Tianshui, Gansu Province, 1342 m, 28.vii.2006, leg. Xinpu Wang and Xiangfeng Shi, genitalia slide No. LWC07019. Paratype: 1 ɗ, same data as holotype.

Diagnosis. This species resembles C. porcelanella (Motschulsky, 1861) in the wing pattern, but can be easily distinguished from C. porcelanella by having the uncus expanded to a rounded protuberance dorsobasally, the blunt-tipped costa dentate along distal two thirds on dorsal margin, the sacculus with distal prong not reaching costa, and the anterior margin of the saccus concave. While C. porcelanella possesses the following character states: the uncus not expanding to a protuberance dorso-basally, the spine-tipped costa smooth dorsally, the sacculus with long distal prong reaching beyond costa, and the anterior margin of the saccus convex.

Description. Adult ( Fig. 3 ): Forewing length 7.0–8.0 mm. Frons and vertex white. Labial palpus with first and second segments greyish white except pure white at base of first segment; third segment white mixed with brown except pure white dorsally. Maxillary palpus pale brown, white distally. Antenna greyish white on dorsal surface, dark brown ciliated with white on ventral surface. Patagium greyish brown except white medially. Tegula greyish brown, white posteriorly. Thorax white, mixed with greyish brown on dorsal surface. Forewing with ground colour white, sparsely suffused with pale brown to black scales; two median fasciae pale brown in anterior three fourths, black in posterior one fourth, angled outwards at anterior one third, incurved near dorsum; double subterminal fasciae black in anterior one third, pale brown in posterior two thirds, incurved near costa, outcurved medially, dentate inwards near dorsum; terminal fascia black, with seven evenly spaced black spots; cilia shiny, dark brown, with greyish white basal line. Hindwing and cilia yellowish white. Foreleg dark brown except femur white; mid- and hindlegs white, tibiae dark brown on outer side, tarsi with pale brown rings.

Male genitalia ( Fig. 7 ): Uncus long and thin, with rounded protuberance dorso-basally; apex pointed, hooked downwards. Gnathos about three fifths length of uncus, blunt apically. Tegumen nearly as long as uncus. Valva with distal one third narrowed towards bluntly rounded apex; costa long and narrow, strongly sclerotized, concave slightly at base, dentate dorsally along distal two thirds, tapering to blunt tip, reaching two thirds of valva. Sacculus developed; basal half long and narrow; distal half gradually broadened; distal prong curved outward, reaching two thirds of valva from dorsum. Pseudosaccus thumb-shaped. Saccus broad, concave at middle on anterior margin. Juxta ovate. Phallus long and thin, nearly as long as valva, slightly curved medially, with long and thin apical thorn; cornutus absent.

Female: Unknown.

Distribution. China (Gansu).

Etymology. The specific name is derived from the Latin prefix rotund- = round, and the Latin projectus = protuberant, in reference to the uncus with a unique rounded dorso-basal protuberance in the male genitalia.

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).