Euthalia byakko

Euthalia byakko Uehara & Yoshida, 1995


♂, Phetchabun, Thailand.		♀, Phetchabun, Thailand.

♂, 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.

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, figs. (Phetchabun; Chaiyaphum) (accessed: 2023.03.24)
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)
Euthalia byakko ; Onodera,2022 : 45, pl.130, figs.♂,♂(Un). (Xiangkhouang: Tha)

[ 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).

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Chaiyaphum : 2♂ (photo).

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

[ LAOS ]
Tateng : 2♂.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Notes

New to Vietnam.
The butterfly is very localized but common in habitats. It is found in montane forestd at moderate elevations (Alt. 700 - 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.


♂, Phetchabun, Thailand.	♀, Phetchabun, Thailand.

♂, Phetchabun, Thailand.	♂, Chaiyaphum, Thailand.

2007.02.20 - 2023.04.30.