♂, 1991.03.11. Nan, Thailand.		♂, Nan, Thailand.
♂ genitalia, Nan, Thailand.

ON : Celaenorrhinus dan festa Evans, 1949 OD : Cat. Hesp. Europ. Asia Austr. Brit. Mus. : 113. TL : Kirbari, Naga Hills. (♂, NHML) Distribution : Sikkim, Bhutan, Assam, Manipur, Naga Hills, Myanmar (N. to Karens), N.Thailand (Nan), Laos, Vietnam, Yunnan, Sichuan.

Holotype ♂, #229445, Oct.1912. Kirbari, Naga Hills. (NHML, photo examined.) ; Huang & Xue,2004 : col.pl.13, figs.11,♂(Up & Un),12(label).

[ THAILAND ]
Pseudocoladenia festa ; Inayoshi,2012-2020 : Butterflies in Indo-China, figs.♂(Nan),♂(Nan,Un),♂(Nan),♂(Nan,Un). (Nan) (in part) (29.Feb.2020 last updated ; 31.Jan.2022 changed.)
Pseudocoladenia fatih festa ; Huang,2021 : 583. (by website: Inayoshi,2020)
Pseudocoladenia fatih festa ; Inayoshi,2022-2023 : Butterflies in Indo-China, figs.♂(Nan),♂(Nan,Un),♂(Nan),♂(Nan,Un),♂ genitalia. (Nan) (in part) (28.Feb.2022 last updated ; 31.Oct.2023 changed.),

[ LAOS ]
Coladenia dan fabia ; Motono & Negishi,1989 : pl.111, figs.A5,♂,A6,♂(Un). (in part)

[ VIETNAM ]
Pseudocoladenia dan fabia ; Inoué & Kawazoé,1964 : 47, figs.23,♂,24,♂(Un). (Vodat; Trang Bom; Banmethuot)
Pseudocoladenia fatih festa ; Huang,2021 : 583. (by literature)
Pseudocoladenia fatih festa ; Kishi et al.,2021 : 51, figs.2,♂,2v♂(Un). (Lao Cai: Ban Khoang, Sa Pa)

[ THAILAND ]
Nan : 2♂.
Pua dist., 1991.03.11. 1♂ Y.Inayoshi (YI).

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The first discovery from Thailand is the specimen from Nan shown above. The butterfly is uncommon in montane forests at moderate elevations (Alt. 1100 - 1300m). Males frequently come to the banks of streams and puddles to suck water. This species is found sympatric with Pseudocoladenia fabia.
The populations from Laos and Vietnam are tentatively included in this taxon, but require examination of male genitalia. Further taxonomic and distributional studies, including DNA analysis, are needed.

Evans, W.H.,1949 : A catalogue of the Hesperiidae from Europe, Asia and Australia in the British Museum (Natural History).
i-xix+1-502, pls.1-35. London.

Huang, H. & Xue, Y.P.,2004 : The Chinese Pseudocoladenia skippers (Lepidoptera, Hesperiidae)
Neue Ent. Nachr. 57:161-170, pl.13.

Huang, H.,2021 : Taxonomy and morphology of Chinese butterflies 1 Hesperiidae: Pyrginae: Genera Coladenia Moore,[1881] and Pseudocoladenia Shirôzu & Saigusa,1962
Atalanta 52(4):569-620.

Hou, Y., Cao, C., Chiba, H., Chang, Z., Huang, S., Zhu, L., Kunte, K., Huang, Z., Wang, M. & Fan, X.,2023 :
Molecular phylogeny, historical biogeography, and classification of Pseudocoladenia butterflies (Lepidoptera: Hesperiidae)
Mol. Phylogenet. Evol. 186 (2023) 107865:1-12.

2012.09.30 - 2023.10.31.