Eudonia rectilineata, 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 : 7-8

2. Eudonia rectilineata sp. n.

( Figs. 3 , 15 , 26 )

Type material. China: Holotype: 3, Suyukou, Helanshan (38°30ʹN, 106°06ʹE), Ningxia Huizu Autonomous Region, 2000 m, 4.viii.2006, leg. Feng Yang et al. (genitalia slide No. LWC08058). Paratypes: 1 3, 4 ƤƤ, same data as holotype except dated 9–17.viii.2006 (genitalia slide Nos. LWC07462, LWC07503, LWC08232); 1 3, 1 Ƥ, same data as holotype except dated 10.viii.2005, leg. Xinpu Wang et al.; 1 Ƥ, Xiabingpan (38°48ʹN, 105°52ʹE), Shuimogou, Helanshan, Inner Mongolia Autonomous Region, 1850 m, 4.viii.2010, leg. Hongxia Liu and Zhiwei Zhang; 3 3, 2 ƤƤ, Manhanshan, Liangcheng (40°32ʹN, 112°29ʹE), Inner Mongolia Autonomous Region, 1300–1450 m, 8–10.viii.2002, leg. Dandan Zhang and Zhiqiang Li (genitalia slide Nos. LWC06270, LWC08013); 22 3, 22 ƤƤ, Dahua, Huangyuan (36°43ʹN, 101°17ʹE), Qinghai Province, 11–25.viii.1995, leg. Lanfang Zhu (genitalia slide Nos. LWC06268, LWC06269, LWC08012, LWC08244, DYL00746); 3 3, 10 ƤƤ, Xinglongshan, Yuzhong (35°53ʹN, 104°06ʹE), Gansu Province, 2210– 2130 m, 30.vii–2. viii.1993, leg. Houhun Li (genitalia slide Nos. LWC06258, LWC08018, LWC08057, LWC08242); 1 3, 5 ƤƤ, Yuzhong, Xinglongshan, Gansu Province, 2178 m, 19–21.viii.2007, leg. Feng Yang and Hanguang Gao (genitalia slide Nos. LWC08231, LWC08243); 1 3, 4 ƤƤ, Martyr Cemetery, Sunan (38°50ʹN, 99°36ʹE), Gansu Province, 2250 m, 16.viii.2007, leg. Feng Yang and Hanguan Gao (genitalia slide Nos. LWC07500, LWC07501, LWC08060, LWC08230); 1 Ƥ, Kangding (30°04ʹN, 101°57ʹE), Sichuan Province, 2400 m, 8.vii.2001, leg. Houhun Li and Xinpu Wang (genitalia slide No. LWC06160); 8 ƤƤ, Rize, Jiuzhaigou (33°17ʹN, 103°54ʹE), Sichuan Province, 2700 m, 9–13.vii.2002, leg. Shulian Hao (genitalia slide Nos. LWC06254, LWC08006, LWC08007, LWC08222, LWC08229); 1 3, 1 Ƥ, Zezhawa, Jiuzhaigou, Sichuan Province, 2400 m, 14–16.viii.2002, leg. Shulian Hao (genitalia slide Nos. LWC06260, LWC08218). 1 3, Dahua, Huangyuan, Qinghai Province, 16.viii.1995, leg. Lanfang Zhu; 1 Ƥ, Martyr Cemetery, Sunan, Gansu Province, 2251 m, 16.viii.2007, leg. Feng Yang and Hanguan Gao ( BMNH).

Diagnosis. This species is similar to E. mercurella ( Linnaeus, 1758) in the male genitalia, but can be distinguished by the posterior two thirds of postmedian line straight in the forewing; by the colliculum about one third length of the ductus bursae, and the ductus bursae looped at anterior one third in female genitalia. In E. mercurella , the postmedian line is concave conspicuously at about posterior one third; the colliculum is about half length of the ductus bursae, and the ductus bursae has two loops before colliculum. This species also resembles E. singulannulata sp. n. in the male genitalia, but can be disparted by the forewing pattern and female genitalia. The differences between the two species are stated under E. singulannulata sp. n.

Description. Adult ( Fig. 3 ): Forewing length 7.0–9.5 mm. Frons pale brown. Vertex white mixed with pale brown. Labial palpus blackish brown, white on dorsal surface; first segment white basally on ventral surface. Maxillary palpus blackish 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 and thorax pale brown. Tegula blackish brown, posterior margin with long white scales, some scales pale brown-tipped. Forewing sparsely suffused with pale brown to blackish brown scales, basally with blackish brown stripe; antemedian line white, anterior two thirds oblique outwards, then oblique inwards; antemedian stigmata blackish brown, streaklike, connected with antemedian line; distal discoidal stigma blackish brown, 8-shaped, connected with blackish brown spot at costa; postmedian line white, meeting costa perpendicularly, unconspicuously bending towards distal discoidal stigma, posterior two thirds straight, posterior one fifth with small dentation outwards, meeting dorsum by acute angle; subterminal line white, incurved medially, forming an X-shaped pattern together with postmedian line; fringe yellowish white, subbasal line pale brown, tip mixed with pale brown. Hindwing white to pale brown; fringe yellowish white, subbasal line pale brown. Abdomen pale brown, lined with yellowish white on posterior margin of each segment.

Male genitalia ( Fig. 15 ): Uncus ovate, notched at middle on posterior margin. Gnathos slender, blunt apically. Valva narrowed near base, then broadened slightly to rounded apex, ventral margin concave medially; costa concave near base. Juxta with basal half rounded, narrowed towards blunt apex. Phallus curved medially, slightly shorter than valva.

Female genitalia ( Fig. 26 ): Papilla anale nearly rectangular, notched posteriorly; about half length of apophysis posterior. Tergite eight about half as long as apophysis anterior. Ostium bursae twice as wide as colliculum, surrounded by a piece of spinulate membrane. Antrum funnel-shaped, covered with dense granules. Colliculum about one third length of ductus bursae. Ductus bursae looped at anterior one third. Corpus bursae rounded, covered with dense tiny spines; signum ovate, placed at anterior one third; appendix bursae ovate, arising from anteromedian portion of corpus bursae.

Distribution. China (Gansu, Inner Mongolia, Ningxia, Qinghai, Sichuan).

Etymology. The specific name is derived from the Latin words rectus = straight and lineatus = linear, in reference to the forewing with posterior two thirds of postmedian line straight.

Figures

FIGURES 2 – 5. Adults of Eudonia spp. 2. E. singulannulata sp. n., paratype, male; 3. E. rectilineata sp. n., paratype, female; 4. E. wolongensis sp. n., holotype, male; 5. E. lijiangensis sp. n., holotype, male.

FIGURES 14 – 19. Male genitalia of Eudonia spp. 14. E. singulannulata sp. n., holotype, genitalia slide No. LWC 06272; 15. E. rectilineata sp. n., holotype, genitalia slide No. LWC 08058; 16. E. wolongensis sp. n., holotype, genitalia slide No. LWC 08047; 17. E. lijiangensis sp. n., holotype, genitalia slide No. LWC 08128; 18. E. zhongdianensis sp. n., holotype, genitalia slide No. LWC 06002; 19. E. furva sp. n., holotype, genitalia slide No. LWC 06135 (scales: 0.5 mm).

FIGURES 25 – 27. Female genitalia of Eudonia spp. 25. E. singulannulata sp. n., paratype, genitalia slide No. LWC 07499; 26. E. rectilineata sp. n., paratype, genitalia slide No. LWC 08244; 27. E. wolongensis sp. n., paratype, genitalia slide No. LWC 08074 (scales: 0.5 mm).