♂, Ha Giang, Vietnam. (photo by K.Saito)		♀, Ha Giang, Vietnam. (photo by K.Saito)
♂, Ha Giang, Vietnam. (photo by K.Saito)		♀, Ha Giang, Vietnam. (photo by K.Saito)
♂, Xam Neua, Laos. (photo by K.Saito)		♂, Xam Neua, Laos. (photo by K.Saito)

ON : Athyma orientalis Elwes, 1888 OD : Trans. ent. Soc. Lond. 36(3):354, pl.9, fig.4,♂. TL : Sikkim. Distribution : Nepal, Bhutan, Sikkim, Assam, N.Myanmar, Laos, N.Vietnam, China.

[ LAOS ]
Athyma orientalis ; Nakamura & Wakahara,2012 : 45.

[ VIETNAM ]
Pantoporia opalina f.orientalis ; Dubois & Vitalis,1924 : 41. (Tonkin)
Pantoporia opalina orientalis ; Metaye,1957 : 96. (N)
Athyma orientalis ; Monastyrskii & Devyatkin,2015 : 35. (N: Ha Giang; Lao Cai)
Athyma orientalis ; Monastyrskii,2019 : 4(2):26-27, pl.36, figs.3a♂,3b♂(Un). (N: Ha Giang; Hoang Lien / C: Phong Nha-Ke Bang)

[ LAOS ]
Houaphan : 2♂.

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[ VIETNAM ]
Ha Giang : 2♂ 2♀.

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The relationship with Athyma opalina is still unclear. Further taxonomic study, including DNA analysis, is needed in future.

The difference between orientalis and opalina.

orientalis (Un) opalina (Un) Fore Wing / Species orientalis opalina Triangular white spot beyond the cell long and lengthened to the terman short and well separated from the cell streak

Elwes, H.J.,1888 :
A catalogue of the Lepidoptera of Sikkim, [with additions, corrections, and notes on seasonal and local distribution by Otto Moller].
Trans. ent. Soc. Lond. 36(3):269-465, pls.8-11.

Huang, H.,1998 : Reserch on the butterflies of the Namjagbarwa Region, S.E.Tibet (Lepidoptera: Rhopalocera).
Neue Ent. Nachr. 41:207-263.

Harada, M.,2009 : Two species of Athyma feeding on Berberidaceae.
Butterflies (Teinopalpus) 52:19-22.

K.Saito & Y.Inayoshi, 2010.02.28 - 2022.09.30.