♂, Tak, Thailand.		♂, Chiang Mai (Omkoi dist.), Thailand.

♂, Ranong, Thailand.		♀, Ranong, Thailand.
♂, Ranong, Thailand.		♀, Ranong, Thailand.

ON : Thaumantis diores splendens Tytler, 1939 OD : J. Bombay nat. Hist. Soc. 41(2):251. TL : Karen Hills ; Dawnas. (♂♀, NHML) Distribution : Myanmar (Karen Hills to Dawnas), W. & P.Thailand. ● ssp.diores ● ssp.splendens

[ THAILAND ]
Thaumantis diores diores ; Godfrey,1916 : 124. (Petchaburi River) (in part)
Thaumantis diores diores ; Godfrey,1930 : 261. (Me Wong) (in part)
Thaumantis diores splendens ; Pinratana,1983 : 56, 63, pl.42, fig.20,♂. (Petchaburi) (in part)
Thaumantis diores diores ; Ek-Amnuay,2012 : 336, pl.141, figs.N169a♂,♂(Un),♀,♀(Un). (Phetchaburi)
Thaumantis diores splendens ; Ek-Amnuay,2012 : 336, pl.141, figs.N169b♂,♂(Un),♀(Un). (Ranong) (in part)
Thaumantis diores splendens ; Kimura et al.,2016 : 149, figs.♀,♀(Un). (Kao Poh Ta; Muang Shone) (in part)
Thaumantis diores splendens ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2015- : Butterflies of Thailand, fig. (Phetchaburi) (accessed: 2023.06.03)

[ THAILAND ]
Chiang Mai (Omkoi dist.) : 3♂.

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Tak : 1♂.

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Phetchaburi : 1♂ 1♀ (photo by T.Aoyama) .

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Ranong : 3♂ 2♀.

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The butterfly is not rare locally in montane dense forests at low to moderate elevations (Alt. 50 - 1000m).
The populations in W.Thailand have quite strong blue luster and silvery blue patch on the upperside. Examples of nature photos in Phetchaburi seems same as this taxon, however need to confirm it by specimens. Examples from Ranong also have similar markings, however more purplish luster and the blue patch have less silvery tinge. I treat it as this subspecies provisionally, however further taxonomic study is needed.

Tytler, H.,1939 : Notes on some new and interesting butterflies chiefly from Burma. pt.1.
J. Bombay nat. Hist. Soc. 41(2):235-252.

Li, H-Z, Liu, Z., Li, J-L., Xie, T. & Xu, X-X.,2024 : A revision of the genus Thaumantis Hübner, [1826] from China (Lepidoptera, Nymphalidae, Satyrinae)
Zootaxa 5437(4):597–600.

♂, Phetchaburi, Thailand. (photo by T.Aoyama)	♀, Phetchaburi, Thailand. (photo by T.Aoyama)
♂, Phetchaburi, Thailand. (photo by T.Aoyama)	♂, Phetchaburi, Thailand. (photo by T.Aoyama)

2020.11.30 - 2024.05.31.