Arcanusa sinuosa (Moore, 1888) Moore, 1888
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|Arcanusa sinuosa (Moore, 1888)|
Arcanusa sinuosa (Moore, 1888) comb. n. Figs 2, 8, 11, 15
Scopocera sinuosa Moore, 1888: see Moore 1888: 203. Type Locality: India (Darjeeling).
Stericta sinuosa (Moore): see Hampson 1896: 122; Wang et al. 2003: 117; Rong and Li 2017: 470.
The species is unique in both the external and genital characters than other species of Stericta by its distinct antemedial line and the different juxta. The species is similar to Ar. apexiarcanusa Wang, Chen & Wu, sp. n. Their differences are described above.
Adult. Forewing length 11.0-15.0 mm (n=7). Head yellow mixed with fuscous; labial palpus first segment of labial palpus with pale brown scales, second segment with more fuscous scales than first; third segment with pale yellow scales, apically exceeding metathorax; antenna suffused with yellowish-brown scales. One-third length of scape extension at base with yellow and mixed with black scales; 2/3 length of scape extension closer apex with yellow and black hair-like scales. Thorax mixed with yellow and small number of blackish-brown scales. Forewing covered with yellow, yellowish-brown and black scales; base covered with black scales, antemedial line black, waved, a black patch located on discocellular; central area suffused with pale yellow scales; postmedial line black, waved, arched outward medially; outer area covered with yellowish-brown scales; cilia mixed yellow and brown. Hindwing paler than forewing, with distinct waved postmedial line and more or less black basal area.
Male genitalia. Uncus broad, expanded at apex, densely suffused with setae laterally. Gnathos strongly sclerotized, apex with trifurcate spine-like process. Valva nearly the same width from base to apex, apex obliquely truncated; costa strongly sclerotized, apex swollen; sacculus expanded at base, with a spine-like process in middle. Juxta with two strongly sclerotized lobes joined at apex, apex with minute spines. Phallus cylindrical, with many slender spines distally, curved slightly.
Female genitalia. Ovipositor obviously expanded. Apophysis anterioris lightly longer than apophysis posterioris. Antrum lightly sclerotized. Ductus bursae short, membranous. Corpus bursae rounded, signa consisting of two sclerotized incurved plates.
Fujian: Wuyishan, Sangang, 1♂, gen. slide. no. Ep704 (IZCAS); Chong’anxingcun, Sangang, 740 m, 1♀, 17.VI.1960, Zhang Yiran, gen. slide. no. Ep538 (IZCAS). Hainan: Jianfengling, 1♂, 23.X.1981, Gu Maobin (IZCAS). Yunnan: Jinping, Hetouzai, 1600 m, 1♂, 13.V.1956, Huang Keren, gen. slide. no. Ep112 (IZCAS); Pingbian, Daweishan, 1500 m, 1♂, 20.VI.1956, Huang Keren, gen. slide. no. Ep705 (IZCAS); Pingbian, 1200-1600 m, 1♀, 18.VII.1958, Huang Keren (IZCAS); Xishuangbanna, Menghai, 1500 m, 1♂, 20.VI.1956, Wang Shuyong (IZCAS).
China (Fujian, Hainan, Yunnan), Bhutan, India.
This species was firstly reported in China (Wuyishan Nature Reserve, Fujian) by Wang et al. (2003). We reexamined their voucher material from Fujian (Ep704), which are in accordance with the original description of Stericta sinuosa (Moore, 1888). The species was originally described in Scopocera (junior synonym of Stericta ). However, the species is closer to Lista than Stericta , because it does not have hairs on the outer side of mid-leg tibiae and has quite different genitalia to those of Lista . Thus, a new genus is erected to place the species and a new species, Ar. apexiarcanusa Wang, Chen & Wu, sp. n. In addition, the female is reported for the first time here.
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