Clanis undulosa Moore, 1879, Proc. zool. Soc. Lond. 1879: 387. Type locality: North China.
Synonym. Clanis undulosa jankowskii Gehlen, 1932.
Note. Rothschild & Jordan, 1903, Novit. zool. 9 (suppl.): 214, incorrectly stated that the 'type' was a female.
In the Russian Far East, a lowland species of deciduous woodland dominated by Quercus mongolica (Izerskiy, 1999b).
China: 14.vii (Beijing); 24.vii (Shaanxi); ix (Shaanxi). North Korea: vi (Pukchong; Mt. Kuwol); vii (Baekdu-san); vii (Jueul); 14-27.vii [(unstated locality)]. South Korea: 20-28.vi (Ulleung-do); 26.vii [(unstated locality)]. Russia: 3.vii-24.viii (Primorskiy Kray); 26-27.vii (Khabarovskiy Kray).
The last two weeks of July is the main flight period in the Russian Far East (Koshkin et al, 2015). Park et al. (1999) give early June until early August as the flight period in Korea.
OVUM: Ivory-yellow, slightly oval (2.00 x 2.50mm), shiny and smooth (Bell & Scott, 1937).
LARVA: Full-fed 80--90mm.
Larval hostplants. Unknown for the nominotypical subspecies. However, Clanis undulosa gigantea was recorded on Lespedeza in Guangdong (Mell, 1922b) and northeastern India (Bell & Scott, 1937). Monophagous in Guangdong on L. viatorum (Mell, 1922b) (which Mell, 1935, erroneously listed as L. formosa), which is also the favoured larval hostplant in the Yangtze Valley (Yang, 1978). The record on Ligustrum (Mathur & Balwant Singh, 1960) is almost certainly an error for the North American species Ceratomia undulosa (Walker).
China: Liaoning (Changhai, Dachangshan Island); Hebei; Beijing (Baihua Shan); Shaanxi (30km north of Huangling; Xunyang, 1380m).
North Korea South Hwanghae Prov. (Mt. Kuwol, 950m); North Hamgyong Prov. (Jueul, 1500m; Cheongjin; Baekdu-san, 2500m; Chongjin); South Hamgyong Prov. (Pulgaemi ridge above Pukchong City, 1500m).
South Korea: Kyonggi Prov. (Gwangleung; Cheongpyong; Soyo-san; Myungji-san); Kangwon Prov. (Seolak-san; Odae-san; Hoengsung; Chiak-san; Baekduk-san; Taebek-san; Chuncheon); North Chungchong Prov. (Jecheon); South Chungchong Prov. (Gyeryong-san; Chilgab-san); North Cholla (Jiri-san; Namwon); South Cholla Prov. (Jogye-san; Gwangyang; Gurye); North Kyongsang Prov. (Daegu; Gunwi; Naeyon-san; Juwang-san; Cheongyang-san; Youngcheon; Ulleung-do); South Kyongsang Prov. (Hamyang; Jinyang; Yeohang-san; Muhak-san; Jinju; Geoje-do; Namhae; Goseong; Sacheon; Sancheong; Ulsan; Hadong; Hapcheon).
Russia: Khabarovskiy Kray (Khabarovsk City); Primorskiy Kray (Andreevka; 2km S Andreevka; Yakovlevka; Vityaz Bay; Khasan; Primorskiy; Gamov Peninsula; Furugelma Island; Zanadvorovka; Kedrovaya Pad Nature Reserve; Ryazanovka; Hvalynka; Anuchino; Oktyabrskiy area (Sinel'nikovo-1); Kaimanovka; 5km NE Kaimanovka; Vozdvizhenka; Ussuriisky Reserve, Suvorovskoe lesnichestvo, 20km NNE Mnogoudobnoe; Taezhnyi, near Kiparisovo; Mirnyi; Gusevskiy mine).
This species was first collected in the Russian Far East in 1975 by Velezhanin, on Furugelma Island near the border with North Korea. In 1979, V. Dubatolov found it at Vityaz Bay by the Gamov Peninsula, where it is now common. It has since spread farther north, to Yakovlevka, north of Andreevka, where it was collected by P. Ustyuzhanin (Dubatolov, pers. comm. 2010). In 2014 it was recorded even farther north, from Khabarovsk City (Koshkin et al, 2015).
The nominotypical subspecies occurs in the southern Russian Far East, the Korean Peninsula and northeastern China, as far as south and west as Shaanxi and Hebei. South from Sichuan (Baoxing), Hubei, Jiangxi (Guling) and Zhejiang (Tianmu Shan), it is replaced by Clanis undulosa gigantea (Rothschild), which ranges west to Nepal and south, through Thailand and Vietnam, to Peninsular Malaysia.
Holarctic; eastern Palaearctic region. Pleistocene refuge: Monocentric -- Sinopacific refugium.