EUPANACRA TSEKOUI (Clark, 1926) -- Yanmen rippled hawkmoth

TAXONOMY

Panacra tsekoui Clark, 1926, Proceedings of the New England Zoological Club 9: 51. Type locality: China: [Yunnan,] Tsekou [Yanmen, on the Lancang/Mekong river, 28°04'N 98°54'E].

Synonym. Panacra tsekoui Clark, 1926.

Note. Elevated from subspecies to species level by Jiang, Wang, Xu, Wang & Hu, 2026.

ADULT DESCRIPTION AND VARIATION

Very similar to Eupanacra perfecta, but considerably larger and paler, tending to be more grey-brown. Forewing narrower but upperside similar to Eupanacra perfecta, ground colour lighter, postmedian lines less well marked, dark area along median part of outer margin less prominent. Forewing underside less brightly coloured than in Eupanacra perfecta, bright orange shading in apical half of wing ash-grey, basal area paler. Hindwing upperside lighter than in Eupanacra perfecta. Hindwing underside duller, orange areas of Eupanacra perfecta ash-grey. Upperside of thorax and abdomen lighter than in Eupanacra perfecta.

Male genitalia very similar to Eupanacra perfecta, but uncus and gnathos shorter. Valva more rounded. Sacculus shorter, basal part broad, harpe shorter and more curved upwards than in Eupanacra perfecta. Phallus short and straight, terminating in a bilobed apical process, one lobe is short and broad downwards, edged with several spines, while the other lobe is semicircular shaped upwards, apically curved with dense tines (Jiang, Wang, Xu, Wang & Hu, 2026).

ADULT BIOLOGY

Unknown.

FLIGHT-TIME

China: 11.v (Hunan); 26.v (Guangxi); 21-25.vi (Chongqing; Sichuan; Yunnan; Shaanxi); 2.vii (Zhejiang); 11-28.vii (Yunnan).

EARLY STAGES

OVUM: Unknown.

LARVA: Unknown.

PUPA: Unknown.

Larval hostplants. Unknown.

PARASITOIDS

Unknown.

LOCAL DISTRIBUTION

China: Shaanxi (Ningshan County, Huoditang); Zhejiang (Quzhou); Sichuan (Yingjing, 1270m); Chongqing (Wuxi County, Yintiaoling Nature Reserve, 1270 m); Yunnan (Jingdong County, Pu'er; Lijiang; Yanmen; Laojun Shan, 2579m; Pingbian County, Dawei Shan Nature Reserve, 2000m; Zhaotong, Qiaojia County, 2193m; Weixi, Tacheng, 1270m; Dali, Cangshan, 1270m; Dulongjiang, Dizhendang, 2150m; Dulongjiang, Maku, 2170m); Hunan (Chenzhou, 1000 m); Guangxi (Maoershan, 1480m).

GLOBAL DISTRIBUTION

Endemic to southwestern China, northern Vietnam (Sapa) and northern Thailand (Doi Inthanon).

Map: Global distribution of Eupanacra tsekoui (© Jiang, Wang, Xu, Wang & Hu, 2026).

BIOGEOGRAPHICAL AFFILIATION