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 : Tyô to Ga 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: Sophonviwatkul et al.,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 et al.,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 forests at moderate elevations (700–1,000 m a.s.l.). I have seen an individual that I believe to be this species at 1500 m a.s.l. 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.
Tyô to Ga, 45(4): 251–254.

Yokochi, T, 2010. Revision of the Subgenus Limbusa Moore, [1897] (Lepidoptera, Nymphalidae, Adoliadini).
Part 1. Systematic arranement and taxonomic list.
Bulletin of the Kitakyushu Museum of Natural History and Human History. Series A, Natural History, 8: 19–67.

Yokochi, T, 2012. Revision of the Subgenus Limbusa Moore, [1897] (Lepidoptera, Nymphalidae, Adoliadini).
Part 3. Descriptions of species (2).
Bulletin of the Kitakyushu Museum of Natural History and Human History. Series A, Natural History, 10: 9–100.


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

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

2007.02.20 - 2023.04.30.