Eudonia hexamera, Li, Weichun, Li, Houhun & Nuss, Matthias, 2012

Li, Weichun, Li, Houhun & Nuss, Matthias, 2012, Taxonomic revision of the genus Eudonia Billberg, 1820 from China (Lepidoptera: Crambidae: Scopariinae), Zootaxa 3273, pp. 1-27 : 13-14

13. Eudonia hexamera sp. n.

( Figs. 8, 20, 31)

Type material. Holotype: 3, China: Zezhawa, Jiuzhaigou (33 ° 17 ʹN, 103 ° 54 ʹE), Sichuan Province, 2400 m, 14.viii. 2002, leg. Shulian Hao (genitalia slide No. LWC08224 ). Paratypes: 5 3, 18 ƤƤ, same data as holotype except dated 14–16.viii. 2002 (genitalia slide Nos. LWC06259 , LWC06309 , LWC08054 ); 1 3, 2 ƤƤ, Heye, Jiuzhaigou, Sichuan Province, 2350 m, 18.vii. 2002, leg. Shulian Hao (genitalia slide No. LWC07472 ); 4 3, 31 ƤƤ, Rize, Jiuzhaigou, Sichuan Province, 2700 m, 9–13.vii. 2002, leg. Shulian Hao (genitalia slide Nos. LWC06253 , LWC06257 , LWC08005 , LWC08072 , LWC08162 , LWC08163 ); 1 Ƥ, Labahe, Tianquan (30 °06ʹN, 102 ° 46 ʹE), Sichuan Province, 1300 m, 29.vii. 2004, leg. Yingdang Ren (genitalia slide No. LWC06302 ). 1 3, 2 ƤƤ, Rize, Jiuzhaigou, Sichuan Province, 2700 m, 13.vii. 2002, leg. Shulian Hao ( BMNH).

Diagnosis. This species is similar to E. speideli ( Leraut, 1982) in the wing patterns and female genitalia. It can be distinguished by the valva with median part narrower than basal and apical parts, the ventral margin strongly concave at middle in the male genitalia; by the ductus bursae looped six times in the female genitalia. In E. speideli , the valva broadens from base towards apex, the ventral margin is nearly straight; the ductus bursae has ten to eleven loops.

Description. Adult ( Fig. 8): Forewing length 6.0–8.0 mm. Frons and vertex pale brown mixed with white. Labial palpus pale brown; first segment white ventrally at base. Maxillary palpus pale brown, white distally. Antenna with scapus pale brown dorsally, white ventrally; flagellomeres pale brown and white on dorsal surface, pale brown on ventral surface. Patagium pale brown. Thorax greyish. Tegula blackish brown, posterior margin with long white scales. Forewing covered with sparse blackish brown scales; antemedian line white, outcurved slightly; antemedian stigmata blackish brown: streaklike proximal discoidal stigma connected with antemedian line, ovate cubital stigma separated from antemedian line; distal discoidal stigma blackish brown, X-shaped, connected with blackish brown spot at costa; postmedian line white, acutely dentate towards distal discoidal stigma, obliquely incurved posteriorly, meeting costa and dorsum perpendicularly; subterminal line white, incurved medially, connected with postmedian line, together forming a large X-shaped pattern; fringe white, subbasal line pale brown. Hindwing and fringe white. Abdomen greyish.

Male genitalia ( Fig. 20): Uncus ovate, notched at middle on posterior margin. Gnathos slender, apex bluntly rounded. Valva broad basally; distal three fifths slightly narrower, almost parallel-sided to blunt apex; ventral margin concave slightly at middle; costa nearly straight. Juxta elongate oblong, narrowed posteriorly. Phallus curved medially, nearly as long as valva.

Female genitalia ( Fig. 31): Papilla anale ovate; about one third length of apophysis posterior. Tergite eight about half as long as apophysis anterior. Ostium bursae about three times as wide as colliculum. Antrum funnelshaped, covered with dense granules. Colliculum about one fourth length of ductus bursae. Ductus bursae with six loops. Corpus bursae rounded, covered with dense tiny spines; signum elliptic, placed at middle of corpus bursae; appendix bursae ovate, arising from anterior one fourth of corpus bursae.

Distribution. China (Sichuan).

Etymology. The specific name is derived from the Latin hexamerus = senary, in reference to the six loops of ductus bursae in the female genitalia.