♂, Phrae, Thailand.		♀, Phrae, Thailand.
♂, Chiang Rai, Thailand.		♀, Chiang Rai, Thailand.
♂, Nan, Thailand.		♀, Nan, Thailand.
♂, Phetchabun, Thailand.		♂, Vinh Phuc, Vietnam.

ON : Thaumantis diores Doubleday, 1845 OD : Ann. Mag. nat. Hist. (1)16(105):234-235. TL : Sylhet. Distribution : Sikkim to Myanmar, N. & C.Thailand, N. & C.Laos, N. & C.Vietnam. ● ssp.diores ● ssp.splendens

Thaumantis ramdeo Moore, [1858] : in Horsfield & Moore, Cat. Lep. Mus. East India Co. (1):215. TL. Darjeeling.

[ THAILAND ]
Thaumantis diores diores ; Godfrey,1916 : 124. (Prae; Me Song forest) (in part)
Thaumantis diores diores ; Godfrey,1927 : 122. (N)
Thaumantis diores diores ; Godfrey,1930 : 261. (Prae: Me Song forest; Chiang Rai: Doi Chang) (in part)
Thaumantis diores splendens ; Pinratana,1983 : 56, 63, pl.42, fig.20,♂. (Chiang Mai; Loei) (in part)
Thaumantis diores splendens ; Ek-Amnuay,[2007] : 334, pl.141, figs.A22,♂,♂(Un),♀,♀(Un). (Chiang Mai)
Thaumantis diores diores ; Ek-Amnuay,2012 : 336, pl.141, figs.N169a♂,♂(Un),♀,♀(Un). (Chiang Mai) (in part)
Thaumantis diores diores ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2015- : Butterflies of Thailand, figs. (Nan; Phetchabun) (accessed: 2023.06.03)
Thaumantis diores diores ; Kimura et al.,2016 : 149, figs.♂,♂(Un),♀,♀(Un). (Doi Suthep; Khun Lao; Nam Nao; Phu Khiewo)

[ LAOS ]
Thaumantis diores ; Dubois & Vitalis,1924 : 33. (Xieng-Om; Lat-Muong; Nam-Tiene)
Thaumantis diores splendens ; Motono & Negishi,1989 : 66, pl.92, fig.8,♂(Un). (Vang Vieng)
Thaumantis diores hainana ; Osada, Uémura & Uehara,1999 : 212, pl.98, fig.♂. (Xiang Khouang)
Thaumantis diores hainana ; Uémura,2005 : 4, fig.24,map. (Ban Saleui; Nong Het; Phong Si; Nha Hin)
Thaumantis diores hainana ; Uémura,2006 : 5-6, fig.35,map. (C: near border to Vietnam)
Thaumantis diores diores ; Nakamura & Wakahara,2012 : 50.
Thaumantis diores diores ; Onodera,2022 : 66, pl.194, figs.♂,♂(Un). (Luang Phabang)

[ VIETNAM ]
Thaumantis diores ramdeo ; Fruhstorfer,1911 : 438. (Tonkin: Bay of Along)
Thaumantis ramdeo ; Vitalis,1919 : 225. (Tonkin)
Thaumantis diores ; Dubois & Vitalis,1924 : 33. (Tonkin: Ha-Giang)
Thaumantis diores ; Lemée,1950 : 9. (Hagiang / Backan)
Thaumantis diores diores f.aest.diores ; Metaye,1957 : 100. (C)
Thaumantis diores diores f.hib.ramdeo ; Metaye,1957 : 100. (N / C)
Thaumantis diores diores ; Ikeda et al.,1999 : 57,59, figs.8:10,♂,11,♂(Un),12,♀, fig.9:41(♂,genitalia). (Cuc Phuong)
Thaumantis diores ; Luong et al.,2004 : 5, 53, figs.♂,♂(Un),♀,♀(Un). (Cuc Phuong)
Thaumantis diores diores ; Monastyrskii,2011 : 112-114. (N: Hoang Lien; Tam Dao; Ba Be; Na Hang; Huu Lien; Bay Tu Long / C: Cuc Phuong; Xuan Lien; Pu Hoat; Pu Mat; Huong Son)
Thaumantis diores diores ; Monastyrskii & Devyatkin,2015 : 29. (N / C)

[ THAILAND ]
Mae Hong Son : 2♂ (incl. photo).

Jan

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May

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Jul

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Sep

Oct

Nov

Dec

Chiang Rai : 1♂ 1♀.

Jan

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Chiang Mai : 3♂ 1♀.

Jan

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Sep

Oct

Nov

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Lampang : 1♂.

Jan

Feb

Mar

Apr

May

Jun

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Sep

Oct

Nov

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Phrae : 5♂ 1♀.

Jan

Feb

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May

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Nan : 6♂ 5♀ (incl. photo & photo by A.Giudici).

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Phetchabun : 1♂.

Jan

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Mar

Apr

May

Jun

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Sep

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Chaiyaphum : 2♂ (incl. photo).

Jan

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Jun

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Oct

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Dec

[ LAOS ]
Luang Phabang : 1♂ (photo by H.Onodera).

Jan

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Oct

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Xieng Khouang : 1♂ (photo by H.Onodera).

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[ VIETNAM ]
Vinh Phuc : 1♂.

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Dec

The butterfly is not rare locally in montane dense forests at low to moderate elevations (Alt.400 - 1300m).
The populations in N.Vietnam and C.Thailand have slightly different genitalia that seems intermediate between ssp.diores and ssp.hainana. However blue markings on the upperside are similar to ssp.diores. I treat the populations in northern Indo-china region as nominotypical subspecies provisionally. Further taxonomic study is needed.

Doubleday, E.,1845 : Descriptions of new or imperfectly described Diurnal Lepidoptera.
Ann. Mag. nat. Hist. (1)16:176-182, 232-236, 304-307.

Horsfield, T. & Moore, F.,[1858] :
A catalogue of the Lepidopterous Insects in the Museum of the Honourable East-India Company. Vol.1.
London. East India Co.

Lang, S.Y.,2010 : Thaumantis hainana (Crowley, 1900), a distinct species (Lepidoptera, Nymphalidae)
Atalanta 41(1/2):235-238.

♂, Mae Hong Son, Thailand.	♀, Nan, Thailand.
♂, Chaiyaphum, Thailand.	♀, Nan, Thailand. (photo by A.Giudici)

2007.10.10 - 2023.06.30.