♂, Bolikhamxai, Laos. (photo by K.Saito)		♀, Bolikhamxai, Laos. (photo by K.Saito)
♂, 1990.04.13, Mae Hong Son, Thailand.

ON : Chitoria sordida vietnamica Nguyen, 1979 OD : Rev. fr. ent. (N.S.) 1(1): 42-43. TL : "Hoa-Binh, Tonkin" [Hoa Binh, N.Vietnam]. (MNHM) Distribution : NW Thailand, E.Laos, Vietnam.

Holotype ♂, Tonkin (Hoa Binh), 1933. (MNHN) ; Masui,2004 : figs.3,♂,♂(Un)
Allotype ♀, Tonkin (Chong Tho), 1926(?) (MNHN) ; Masui,2004 : figs.4,♀,♀(Un)
Paratypes : 12♂, Hoa-Binh, Tonkin (MNHN) ; 6♂, Bao-Ha, Tonkin. (NHML) ; 2♀, Bao-Ha, Tonkin. (NHML)

[ THAILAND ]
Chitoria vietnamica ; Ek-Amnuay,[2007] : 466, pl.207, figs.N175,♂,♂(Un). (Mae Hong Son)
Chitoria naga ; Ek-Amnuay,2012 : 488, pl.217, figs.N360,♂,♂(Un). (Mae Hong Son)
Chitoria naga ; Kimura et al.,2016 : 123. (Mae Hong Son by literature) (in part)

[ LAOS ]
Chitoria vietnamica ; Osada, Uémura & Uehara,1999 : 208, pl.72, figs.♂,♂(Un),♀. (Lak Sao)
Chitoria sordida vietnamica ; Masui,2004 : 246-248, figs.7,♂(Up & Un),8,♀(Up & Un). (Lak Sao)
Chitoria sordida vietnamica ; Nakamura & Wakahara,2012 : 47.
Chitoria sordida vietnamica ; Masui,2025 : 208, pl.24, figs.♀,♀(Un). (E.Laos)

[ VIETNAM ]
Apatura sordida f. sordida ; Dubois & Vitalis,1924 : 45. (Tonkin)
Apatura sordida sordida ; Metaye,1957 : 98. (N)
Chitoria sordida vietnamica ; Masui,2004 : 246-248, figs.3,♂(HT),♂(HT,Un). (N: Hoa-Bin; Chong Tho; Bao-Ha; Mt.Pia Oak)
Chitoria sordida vietnamica ; Masui,2011 : 55, figs.♂,♂(Un),♀,♀(Un). (C: Deo Ngoan Muc, Ninh Thuan)
Chitoria sordida vietnamica ; Monastyrskii & Devyatkin,2015 : 43. (N / C: to Lam Dong)
Chitoria sordida vietnamica ; Monastyrskii,2019 : 4(1):62-63, pl.5, figs.2a♂,2b♂(Un). (N: Hoang Lien; Ba Be; Mau Son / C)
Chitoria sordida vietnamica ; Masui,2025 : 208, pl.24, figs.♂,♂(Un),♂,♂(Un),♀,♀(Un). (Vietnam)

[ THAILAND ]
Mae Hong Son : Mae Hong Son dist., 1990.04.13. 1♂, P.Sukkit (YI)

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[ LAOS ]
Bolikhamxai : 1♂ 1♀.

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The butterfly is rare in Thailand. The specimen from Mae Hong Son shown above is the first and only record of this until now. It appears to be slightly different from both the nominotypical subspecies and ssp.vietnamica. Further taxonomic and distributional studies are needed.

Nguyen, T.H.,1979 : La variation géographique de Chitoria sordida (Lepidoptera: Nymphalidae).
Rev. fr. ent. (n.s.) 1(1): 42-45.

Masui, A.,2004 : A revision on Chitoria sordida and C.naga (Lepidoptera, Nymphalidae).
Tyô to Ga 55(4): 243-250.

Masui, A.,2011 : A new record of Chitoria sordida vietnamica Nguyen, 1979 from central Vietnam (Lepidoptera, Nymphalidae, Apaturinae).
Butterflies (Teinopalpus) 57: 55.

2007.09.20 - 2025.12.31.