Chrysoteuchia shafferi 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 : 39-40

Chrysoteuchia shafferi Li & Li , sp. n.

( Figs. 6 , 10 , 13 )

Type material. Holotype ɗ, China: Pingheliang, Ningshan (33°11́N, 108°12́E), Shaanxi Province, 2100– 2400 m, 10.vi.1987, leg. Houhun Li, genitalia slide No. LWC08447. Paratypes: 1 ɗ, 1 Ψ, same data as holotype.

Diagnosis. This species resembles C. lolotiella ( Caradja, 1927) in the wing pattern, but its genitalia are conspicuously different from those of the latter species. In the new species, the costa lacks the protuberance, the sacculus has a strong distal prong far exceeding costa and the phallus does not have a cornutus in the male genitalia; the lamella postvaginalis is developed and the signum is peanut-shaped in the female genitalia. Whereas the costa of C. lolotiella bears a distinct protuberance, the sacculus lacks the distal prong, and the phallus bears many small spinelike cornuti; the lamella vaginalis is absent and the signum is rounded. It is also very similar to C. furva Li & Li , sp. n. in the wing pattern, but can be distinguished easily by the genitalia.

Description. Adult ( Fig. 6 ): Forewing length 8.5–9.5 mm. Frons, vertex, labial palpus and maxillary palpus black. Antenna black, ciliated with white ventrally. Patagium, tegula and thorax blackish brown. Forewing blackish brown, with three black spots in medial area: first one set near upper corner of cell, second one at middle of fold, third one at middle of dorsum; subterminal fascia represented by seven black spots evenly distributed from distal 1/4 near costa to distal 1/4 of dorsum, anterior three oblique outwards, posterior four oblique inwards; cilia blackish brown. Hindwing black, cilia with basal one third blackish brown, distal two thirds white. Legs black. Abdomen with anterior half black, posterior half yellow.

Male genitalia ( Fig. 10 ). Uncus long and thin, curved down slightly, pointed apically. Gnathos about three fourths length of uncus, upcurved slightly, tapering to pointed tip. Tegumen about twice as long as gnathos. Valva wider in basal two thirds, narrowed to bluntly rounded apex in distal one third; costa long and narrow, concave slightly at base. Sacculus long and narrow, ventrally convex; strong distal prong reaching upward and far exceeding costa. Pseudosaccus thumb-shaped. Saccus broad, concave at middle on anterior margin. Juxta broad V-shaped. Phallus slightly shorter than valva, basally thick, gradually produced to long and thin apical spine; apical spine with small triangular prong; cornutus absent.

Female genitalia ( Fig. 13 ). Tergite VIII slightly longer than apophysis posterioris. Lamella postvaginalis broad and short, slightly broader than antrum, convex at middle on posterior margin, wrapped with dense tiny spines posterolaterally. Antrum strongly sclerotized, gradually thickened towards ostium bursae. Ductus bursae long and thin, membranous; ductus seminalis arising from posterior one fifth of ductus bursae. Corpus bursae ovate; signum peanut-shaped, placed at posterior one third.

Distribution. China (Shaanxi).

Etymology. This species is named in honour of the late Michael Shaffer, who contributed profoundly to the research of Pyraloidea for more than 50 years in the Natural History Museum (BMNH), London.

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).