Euthalia byakko  Uehara & Yoshida, 1995

Euthalia byakko ♂ Up. Euthalia byakko ♂ Un. Euthalia byakko ♀ Up. Euthalia byakko ♀ Un.
♂, Phetchabun, Thailand. ♀, Phetchabun, Thailand.
Euthalia byakko ♂ Up. Euthalia byakko ♂ Un. Euthalia byakko ♂ Up. Euthalia byakko ♂ Un.
♂, Tateng, Laos. (photo by K.Saito) ♂, 2020.05.--. Kon Tum, Vietnam. (photo by K.Saito)

ON : Euthalia byakko Uehara & Yoshida, 1995
OD : Trans. lep. Soc. Japan 45(4):251-253,
figs.1(HT,♂), 2(HT,♂Un), 3(♂genitalia).
TL : Oudomxay, Laos. (♂, in coll. J.Uehara)
Distribution : Thailand, Laos, Vietnam.
Euthalia byakko map

Type Materials Information

Holotype ♂, 27.Apr.1994. Oudomxay, Laos. J.Uehara leg. (in coll. J.Uehara) : Yokochi,2010 : 24, pl.4, figs.21a♂,21b♂(Un).
Paratype : 1♂, 27.Apr.1994. Oudomxay, Laos. T.Yoshida leg. (in coll. T.Yoshida)


Records taken from Literature

[ THAILAND ]
Bassarona byakko ; Ek-Amnuay,[2007] : 450, pl.199, figs.N162,♂,♂(Un). (Petchabun; Phu Khieo)
Euthalia byakko ; Ek-Amnuay,2012 : 462, pl.204, figs.N327,♂,♂(Un). (Phetchabun; Phu Khieo)
Euthalia byakko ; Yokochi,2012 : 9-11. (Phetchabun)
Euthalia byakko ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2015- : Butterflies of Thailand, fig. (Phetchabun) (accessed: 2021.12.25)
Euthalia byakko ; Kimura et al.,2016 : 111, figs.♂,♂(Un),♂,♂(Un). (Phu Khiewo; Phetchabun)

[ LAOS ]
Euthalia byakko ; Masui & Uehara,1996 : 5, pl.2, fig.1. (Oudomxay)
Euthalia byakko ; Osada, Uémura & Uehara,1999 : 207, pl.67, figs.♂(HT),♀. (Oudomxay; Lak Sao)
Euthalia byakko ; Masui & Uehara,2004 : 29, 26, fig.14,♂. (Oudomxay)
Euthalia byakko ; Nakamura & Wakahara,2012 : 46.
Euthalia byakko ; Yokochi,2012 : 9-11, pl.60, figs.429a♂,429b♂(Un),430a♀,430b♀(Un). (Xieng Khouang; Lak Sao; Nakai; Pakse)

[ VIETNAM ]
Euthalia byakko ; Saito & Inayoshi,2022b : 25,28, figs.21,♂,21v♂(Un). (Kon Tum: Dak To)


Specimens Examined

[ THAILAND ]
Phetchabun : 5♂ 1♀ (incl.photo and photo by A.Giudici).
JanFebMarAprMayJun JulAugSepOctNovDec

Chaiyaphum : 2♂ (photo).
JanFebMarAprMayJun JulAugSepOctNovDec


[ LAOS ]
Tateng : 2♂.
JanFebMarAprMayJun JulAugSepOctNovDec


[ VIETNAM ]
Kon Tum : Dak To, 2020.05.--. 1♂, LC (KS).
JanFebMarAprMayJun JulAugSepOctNovDec


Notes

New to Vietnam.
The butterfly is very localized, but common in habitats. It is found in montane forest at moderate elevations (Alt.700m - 1000m). I have seen an individual that I believe to be this species at alt.1500m in Phitsanulok Province. However, I have not included it in my records because it could not be confirmed by specimens. Further distributional research is needed.


Literature

Uehara, J. & Yoshida, T.,1995 : A new species of the genus Euthalia (Lepidoptera, Nymphalidae) from Laos.
Trans. lep. Soc. Japan 45(4):251-254.

Yokochi, T.,2010 : Revision of the Subgenus Limbusa Moore,[1897] (Lepidoptera, Nymphalidae, Adoliadini)
Part 1. Systematic arranement and taxonomic list.
Bull. Kitakyushu Mus. Nat. Hist. Hum. Hist. ser.A, 8:19-67.

Yokochi, T.,2012 : Revision of the Subgenus Limbusa Moore,[1897] (Lepidoptera, Nymphalidae, Adoliadini)
Part 3. Descriptions of species (2)
Bull. Kitakyushu Mus. Nat. Hist. Hum. Hist., ser.A, 10:9-100.


Euthalia byakko ♂ Euthalia byakko ♀
♂, Phetchabun, Thailand. ♀, Phetchabun, Thailand.
Euthalia byakko ♂ Euthalia byakko ♂
♂, Phetchabun, Thailand. ♂, Chaiyaphum, Thailand.

2007.02.20 - 2023.01.31.

A Check list of Butterflies in Indo-China, Chiefly from THAILAND, LAOS & VIETNAM. Copyright © 1996- Y.Inayoshi.