Oreta extensa Walker, 1855

Song, Wenhui, Xue, Dayong & Han, Hongxiang, 2012, Revision of Chinese Oretinae (Lepidoptera, Drepanidae), Zootaxa 3445, pp. 1-36 : 25

Oreta extensa Walker, 1855

Figs. 46 , 92 , 124 , 153

Oreta extensa Walker, 1855 , List Specimens lepid. Insects Colln Br. Mus., 5: 1166. Holotype 3, Indonesia: Java (BMNH). Oreta figlina Swinhoe, 1905 , Ann. Mag. nat . Hist., (7) 16: 142. Syntype (s), Indonesia: Java (BMNH). Oreta trispina Watson sensu Chu & Wang, 1987 , Acta Ent. Sin., 30 (3): 295. (part)

Material examined. CHINA, Fujian ( IZCAS): Nanjing, 6.XI.1980, 13; Wuping, Liangyeshan, Kongxia, 480–627 m, 17–19.XI.2008, coll. Chen Fuqiang, 13. Hainan ( IZCAS): Lingshui, Diaoluoshan, 920 m, 29.III.2008, coll. Lang Songyun, 13. Yunnan ( IZCAS): Tengchong, Dahaoping, 2020 m, 5–7.VIII.2007, coll. Wu Chunguang, 13.

Diagnosis. On wing pattern, O. extensa is similar to O. fuscopurpurea . However, O. extensa can be distinguished by the following characters: the forewing apex is more elongate; the outer margin below the apex is more protruding; the wings are not diffused with pale pink scales; a black round patch is present on the tornal patch of the forewing; the white line on the discocellulars of both wings is indistinct. In O. fuscopurpurea , the forewing apex is shorter, the outer margin below the apex is almost straight, the black patch on the tornal patch of the forewing is replaced by a broad black wavy line, pale pink scales are present on the forewing costa, apex and near the tornal patch, and white speckles are distinct on both angles of the cell on both wings. O. extensa is also close to O. pingorum Holloway (Borneo, Sulawesi, Buru, New Guinea) on both external and genital characters, and cannot be distinguished externally. The valvae of both species are divided into two large, straight, well developed processes, which are longer and distally spinose in O. extensa , but shorter and smooth in the proximal process, and totally spinose in the distal process in O. pingorum . The aedeagus of O. extensa has a long posterior process, and a central bulge.

Distribution. China (Fujian, Taiwan, Guangdong, Hainan, Yunnan), Japan, India, Sri Lanka, Thailand, Indonesia.

Remarks. The species was recently recorded in Japan by Nakajima (2009).

Figures

FIGURES 33 – 53. Adults of Oretinae (Scale bar = 1 cm). 33, Oreta pavaca sinensis (Holotype of O. fusca); 34, ditto (Holotype of O. unichroma); 35 – 36, O. trispinuligera, 35, Holotype; 37, O. trispinuligera (Holotype of O. ankyra); 38, O. liensis; 39, O. sanguinea; 40, O. eminens; 41, O. inflativalva sp. nov., Holotype; 42 – 43, O. angularis; 44 – 45, O. insignis; 46, O. extensa; 47, O. fuscopurpurea; 48, O. griseotincta; 49, O. bilineata; 50, Spectroreta hyalodisca (Holotype of S. fenestra); 51, Neoreta olga; 52, N. purpureofascia; 53, N. brunhyala, Paratype.

FIGURES 90 – 98. Male genitalia of Oretinae (Scale bar = 1 mm). 90, Oreta angularis; 91, O. insignis; 92, O. extensa; 93, O. fuscopurpurea; 94, O. griseotincta; 95, Spectroreta hyalodisca; 96, Neoreta olga; 97, N. purpureofascia; 98, N. brunhyala.

FIGURES 116 – 130. Aedeagus of Oretinae (Scale bar = 1 mm). 116, O. pavaca pavaca (Holotype of O. zigzaga); 117, O. pavaca sinensis (Paratype of O. zigzaga); 118, O. trispinuligera; 119, O. liensis; 120, O. sanguinea; 121, O. inflativalva sp. nov.; 122, O. angularis; 123, O. insignis; 124, O. extensa; 125, O. fuscopurpurea; 126, O. griseotincta; 127, Spectroreta hyalodisca; 128, Neoreta olga; 129, N. purpureofascia; 130, N. brunhyala.

FIGURES 131 – 158. The eighth segment of Oretinae. 131, Oreta vatama tsina; 132, O. andrema; 133, O. obtusa dejeani; 134, O. speciosa; 135, O. brunnea; 136, O. loochooana loochooana; 137, O. loochooana timutia; 138, O. pulchripes; 139, O. turpis; 140, O. hoenei hoenei; 141, O. hoenei inangulata; 142, O. hoenei tienia; 143, O. paki; 144, O. ancora; 145, O. trispina; 146, O. pavaca pavaca (Holotype of O. zigzaga); 147, O. trispinuligera; 148, O. liensis; 149, O. sanguinea; 150, O. inflativalva sp. nov.; 151, O. angularis; 152, O. insignis; 153, O. extensa; 154, O. griseotincta; 155, Spectroreta hyalodisca; 156, Neoreta olga; 157, N. purpureofascia; 158, N. brunhyala.