Ankylopteryx gracilis Nakahara 1955

[6] Ankylopteryx gracilis Nakahara, 1955 (Figs 11, 78) Ankylopteryx gracilis Nakahara, 1955: 143. Type locality: China (Taiwan, Hori [Puli]). Holotype in NSMT. Diagnosis. This species is characterized by the presence of the head with three black interantennal spots, the antennal scape and pedicel each with a brown stripe on the outer side, the forewing with pale brown shadings on apical radial crossveins, the basal crossvein of inner gradate series and CuP, the extremely small and narrow cell im, and the male entoprocessus broad and projected at tip. Description. Male. Body length 8.2–8.8 mm, forewing length 11.8–12.5 mm, hindwing length 10.9–11.2 mm. Head yellow, vertex raised. Compound eyes blackish-brown. Antennae yellow, scape and pedicel with brown stripe on outer side. Three interantennal spots black, anterior one triangular and shallow, posterior two small and rounded. Clypeal margin with brown stripes. Gena marked black spots. Maxillary and labial palpi brownish yellow. Pronotum with brown spots on anterolateral angle. Mesonotum totally brown. Metanotum usually without spots. Legs with dense setae. Pro- and mesotibia with median black spot. Pretarsal claws brown, with basal dilation. Forewing broad, with brown shadings on apical radial crossveins, base of Rs, basal crossvein of inner gradate series and CuP. Pterostigma dark brown. Costal area broad basally, with 20–24 crossveins; 9–10 radial crossveins. m1 smaller than m2, im extremely small and narrow; 7 psm-psc crossveins with pale brown shadings. c1 smaller than c2, dcc closed. A1 forked, A2 and A3 simple. Gradate series pale brown, inner gradate series with 5–6 crossveins, outer gradate series with 7–8 crossveins. Hindwing narrow. Pterostigma pale brown. Costal area with 15–20 crossveins; 7–8 radial crossveins and 6 psm-psc crossveins present. Inner gradate series with 4–5 crossveins, outer gradate series with 5–6 crossveins. Abdomen with dense short setae. Tergum VII and sternum VII subquadrate in lateral view; tergum VIII shorter than tergum VII; sternum VIII fused with sternum IX; tergum IX fused with ectoproct. Callus cerci ovoid. Gonarcus arcuate, lateral arms narrow at base and wide at tip; entoprocessus short, attached at about basal 1/3 of gonarcus, broad and projected at tip; pseudopenis widest near tip. Female. Body length 8.8–9.9 mm, forewing length 12.4–13.3 mm, hindwing length 10.8–12.4 mm. Sternum VII longer than tergum VII; tergum VII subquadrate in lateral view; tergum VIII shorter than tergum VII; tergum IX fused with ectoproct. Callus cerci ovoid. Subgenitale bilobed apically; spermatheca thick; vela and ventral impression absent; duct long and curved. Material. 1♂ 2♀, China, Guangdong, Shaoguan, Chebaling National Nature Reserve, 370–400 m, 2018. VII.10–12 (CAU); 1♀, China, Guangdong, Meizhou, Mt. Xiaohuangshan, 2017.VI.19, Yunlan Jiang (CAU); 1♀, China, Guangdong, Foshan, Lutian, 2020.IV.01–V.12 (CAU); 1♀, China, Guangdong, Foshan, Lutian, 2020. VII.06–20 (CAU); 1♀, China, Guangdong, Zhaoqing, Dinghushan National Nature Reserve, 2021.VI.15–18 (CAU); 1♀, China, Guangdong, Zhaoqing, Dinghushan National Nature Reserve, 2021.VI.03–06 (CAU); 2♂ 1♀, China, Guangxi, Fangchenggang, Shiwandashan Forestry Park, 2013.V.18, Guoquan Wang (CAU); 1♀, China, Guangxi, Nanning, Laohuling, 2013.IX.26, Xingyue Liu (CAU); 1♂, China, Guangxi, Chongzuo, Longzhou, Nonggang National Nature Reserve, 2021.VI.05, Xingyue Liu (CAU); 1♂, China, Beiliu, Mt. Darongshan, 2021.VI.05, Yingqi Liu, Zhuo Chen & Yunfei Wu (CAU); 1♀, China, Guangxi, Ningming, Longrui Nature Reserve, 180 m, 1984.V.17, Fasheng Li (CAU); 2♂ 3♀, China, Guangxi, Chongzuo, Longzhou, Nonnggang National Nature Reserve, 240 m, 1982.V.19–20, Chikun Yang (CAU); 1♂ 1♀, China, Hainan, Baisha, 500 m, 2022.IV.26, Yuchen Zheng & Ying Yang (CAU); 1♂, China, Hainan, Baisha, Yuanmen, 2007.V.18, Xingyue Liu (CAU); 1♂, China, Hainan, Baisha, Yinggeling National Nature Reserve, 2007.III.24, Jingxian Liu (CAU); 6♂ 3♀, China, Yunnan, Xishuangbanna, Xishuangbanna Tropical Botanical Garden, 551 m, 2019.IV.25–26, Xingyue Liu (CAU); 2♂ 1♀, China, Yunnan, Xishuangbanna, Xishuangbanna Tropical Botanical Garden, 2007.IV.20, Fang Wang (CAU); 6♂ 6♀, China, Yunnan, Xishuangbannna, Sanchahe, 620 m, 1981.IV.12, Chikun Yang (CAU); 3♂ 1♀, China, Taiwan, Kaohsiung, Shuangxi Park, 2013.VI.03–04, Feiyang Liang (CAU); 1♀, Vietnam, Quang Nam, Phoue Son District, 2011.IX.27, Xingyue Liu (CAU); 2♀, Japan, Okinawa, Ishigaki-jima, Airagawa Komi, 2012.VI.29, Xingyue Liu (CAU). Distribution. China (Guangdong, Guangxi, Hainan, Taiwan, Yunnan); Japan (Okinawa); Laos (Vientiane); Vietnam (Quang Nam).