Tenupalpa angustella (Omelko, 1984)

(Figs 1, 3−5, 26, 46, 85)

Cnaphostola angustella Omelko, 1984: 32; Omelko, 1999: 183; Park & Ponomarenko, 2007: 45; Ponomarenko, 2008: 91; Sakamaki, 2013: 298. TL: Russia (Primorsk Territory). TD: ZIRAS.

Thiotricha angustella Kyaw et al., 2019: 73 .

Tenupalpa angustella Lee et al., 2021: 371 .

Material examined. CHINA: Beijing: 1 ♀, Xiaolongmen Forest Farm (39.97°N, 115.44°E), 1080 m, 31.vii.2009, leg. Aihuan Zhang and Ping Liu, genitalia slide no. LGE17286 ; 1 ♂, Dakezhuang Village, Mt. Song, 1.viii.2010, leg. Aihuan Zhang and Zheng Li. Fujian Province: 1 ♂, 1 ♀, Xianfengling, 1000 m, Mt. Wuyi, 26.v.2004, leg. Haili Yu, genitalia slide nos. ZJL05253 m, ZJL05257 f. Gansu Province: 1 ♂, Bifenggou (32.97°N, 104.68°E), 860 m, Wen County, 10.vii.2005, leg. Haili Yu, genitalia slide no. ZJL05421 ; 2 ♂♂, 1 ♀, Dangchuan Forest Farm (34.34°N, 106.16°E), 1331 m, Tianshui City, 30.vii.2006, leg. Xinpu Wang and Xiangfeng Shi, genitalia slide nos. GW 14011m, LGE 18719m. Guizhou Province: 9 ♂♂, Shaluo, 390 m, Chishui, 27−29.v.2000, leg. Yanli Du, genitalia slide nos. LZD01181, LZD01188, LZD01189, ZJL05250, ZJL05308 ; 1 ♂, Xiasicun, 840 m, Kuankuoshui Conservation Zone, Suiyang County, 6.vi.2010, leg. Linlin Yang. Henan Province: 1 ♂, Xiaguan Town, 650 m, Neixiang County, 12.vii.1998, leg. Houhun Li, genitalia slide no. LGE18718 ; 1 ♀, Huangshi'an (33.67°N, 111.65°E), 890 m, Xixia County, 17.vii.1998, leg. Houhun Li. Hubei Province: 6 ♂♂, Wujiashan (31.08°N, 115.8°E), Yingshan County, 6−8.vii.2008, leg. Yunli Xiao, genitalia slide no. LGE18505 ; 4 ♂♂, Taohuachong (30.98°N, 116.02°E), 635 m, Yingshan County, 23–25.vi.2014, leg. Wei Guan and Meiqing Yang, genitalia slide no. LGE16107 ; 1 ♀, Mt. Bagua (32.09°N, 109.67°E), 790 m, Zhuxi County, 12.vii.2017, leg. Wanding Qi et al., genitalia slide no. LGE17065 ; 1 ♂, Dafan Village (31.99°N, 111.10°E), 250 m, Baokang County, 16.vii.2017, leg. Wanding Qi et al . Jiangxi Province: 1 ♀, Lushan City, 27.vii.1985, leg. Guangpu Shen, genitalia slide no. ZJL05114 . Liaoning Province: 1 ♂, Gangou (40.8°N, 119.9°E), 524 m, Mt. Bailang, Jianchang County, 10.viii.2016, leg. Mujie Qi, Yanyan Jia and Juan Li. Shandong Province: 15 ♂♂, 2 ♀♀, Mt. Kunyu (37.25°N, 121.77°E), Yantai City, 19, 21.vii.2009, leg. Qing Jin et al., genitalia slide nos. NKLGE013m, LGE 16108m, LGE18033 f, LGE18506 f. Zhejiang Province: 1 ♂, Yanping (28.38°N, 118.89°E), 530 m, Mt. Jiulong, 4.vii.2013, Aihui Yin and Xiuchun ; 1 ♂, Pinggang (30.42°N, 119.55°E), 754 m, Mt. Longxu, 20.vii.2014, leg. Auhui Yin, Xuemei Hu and Qingyun Wang ; 1 ♀, Lao′an (30.33°N, 119.40°E), 555 m, Mt. Tianmu, 18.viii.2014, leg. Aihui Yin, Qingyun Wang and Suran Li, genitalia slide no. LGE15017 ; 1 ♂, Jiufucun (30.09°N, 118.93°E), 520 m, Mt. Longtang, 29.viii.2014, leg. Aihui Yin, Qingyun Wang and Suran Li, genitalia slide no. LGE15016 ; 1 ♂, Laofoyan Village (28.37°N, 118.67°E), 424 m, Shuangxi Town, Xianxialing, Jiangshan City, 8.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu, genitalia slide no. LGE16257 ; 1 ♂, Shimendong (28.27°N, 120.1°E), 102 m, Qingtian County, 20.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu, genitalia slide no. LGE16359 ; 3 ♂♂, Linkeng Village (28.53°N, 120.7°E), 387 m, Yongjia County, 24, 27. viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu ; 1 ♂, Changgangshan Park (30.02°N, 122.12°E), 20 m, Zhoushan City, 30.v.2017, leg. Shuonan Qian and Ga-Eun Lee, genitalia slide no. LGE17162 ; 21 ♂♂, Datou Village (29.10°N, 118.45°E), 707 m, Quzhou City, 6–8.viii.2018, leg. Shuai Yu, Mengran Xing and Chen Liu ; 3 ♂♂, Gutianshan (29.14°N, 118.07°E), 416 m, Kaihua County, 13, 14.viii.2018, leg. Shuai Yu, Mengran Xing and Chen Liu. KOREA: Gyeongsangnam-do: 2 ♂♂, Geoje Island, Gucheon-ri, Dongbu-myeon, 27.vi. 2012, leg. Sung-Soo Kim. Jeju-do: 1 ♂, San 1-3 (33.36°N, 126.46°E), 1070 m, Saekdal-dong, Seogwipo-si, 30.vii.2020, leg. Ga-Eun Lee, genitalia slide no. LGE20009 .

Diagnosis. Adult wingspan 7.0−9.5 mm. This species is distinguished by a whitish forewing irregularly marked with light brown at the middle, at the apex, and along the fold. The forewing lacks a black apical spot and a distal patch (Fig. 46). Tenupalpa angustella is somewhat similar to T. nephodesma, but it lacks a transverse fascia on the forewing present in the latter. In the male genitalia, the anellus lobes are strongly developed and bear a robust spinelike bristle. Also, the triangular projection of the juxta, the large saccus, and the long distal part of the aedeagus are diagnostic (Fig. 5). The female genitalia are characterized by a deeply incised posterior margin and a short emarginate anterior margin of tergum VIII, and a small semilunar signum (Fig. 85).

Distribution. China (Beijing, Fujian, Gansu, Guizhou, Henan, Hubei, Jiangxi, Liaoning, Shandong, Zhejiang), Japan, Korea, Russia. This species is newly recorded from China and Korea.

Host plants. Fagaceae: Quercus dentata (Kyaw et al. 2019), Q. mongolica (Omelko 1999; Park & Ponomarenko 2007; Sakamaki 2013; Kyaw et al. 2019).

Remarks. The type materials deposited in ZIRAS of Russia were not examined in this study. A detailed redescription of T. angustella was provided in Kyaw et al. (2019). The male genitalia are sometimes exposed and the morphological features can be observed without dissection (Fig. 3).