♂, Chanthaburi, Thailand. (photo by K.Saito)		♀, Chanthaburi, Thailand. (photo by K.Saito)

ON : Stichophthalma louisa ssp. OD : TL : Distribution : S.E.Thailand. ● ssp.mathilda ● ssp.siamensis ● ssp. ● ssp.ranohngensis

[ THAILAND ]
Stichophthalma louisa siamensis ; Pinratana,1983 : 50, pl.29, figs.9b♀,♂(Un). (Chanthaburi)
Stichophthalma louisa siamensis ; Nishimura,1998 : 121-122, figs.22,♂,23,♂(Un). (Chanthaburi: Khao Soi Dao)
Stichophthalma louisa siamensis ; Ek-Amnuay,[2007] : 318, pl.130, figs.A10b♂,♂(Un),♀,♀(Un). (Khao Soi Dao; Krathing WF.)
Stichophthalma louisa siemensis ; Ek-Amnuay,2012 : 316, pl.130, figs.N156b♂,♂(Un),♀,♀(Un). (Khao Soi Dai; Krathing WF.)
Stichophthalma louisa ssp. ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2015- : Butterflies of Thailand, figs. (Chanthaburi) (accessed: 2023.06.03)
Stichophthalma louisa siamensis ; Kimura et al.,2016 : 142, figs.♂,♂(Un),♂,♂(Un),♀,♀(Un). (Kao Soi Dao; Krathing WF.)

[ THAILAND ]
Chanthaburi : 3♂ 2♀ (photo & photo by K.Saito and T.Aoyama).

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The butterfly is locally common in montane dense forests mixed with bamboo at moderate elevations (Alt. 300 - 600m) and often comes to rotten fruits that has fallen to the ground. It occurs with S.cambodia, however the species prefer to higher elevations.
For a long time, ssp.siamensis was thought to be the S.E.Thailand population. However, after examination of the type specimen in the NHML, I realized that the spear-shaped black markings on the UpF is not as well developed as in the S.E.Thailand population, and that the N.Thailand population corresponds to siamensis because of its shape. Thus I treat ssp.siamensis as the taxon of N.Thailand, and then the taxon from S.E.Thailand is currently unnamed. In addition, I suspect that this taxon could be a distinct species, based on its distribution and markings. Further taxonomic and distributional studies, including DNA analysis, are needed.

Nishimura, M.,1998 : Notes on the genus Stichophthalma (Lpidoptera, Nymphalidae), with descriptions of a new species from Indo-China.
Trans. lepid. Soc. Japan. 49(2):115-132, 69 figs.

Monastyrskii, A.L. & Devyatkin, A.L.,2008 : Revisional notes on the genus Stichophthalma C.& R.Felder, 1862. (Lepidoptera, Amathusiidae)
Atalanta 39(1-4):281-286, Col.pl.20A-22.

Monastyrskii, A.L.,2011 : Butterflies of Vietnam. Vol.3. Nymphalidae: Danainae, Amathusiinae
Plan-o-rama Media Co Ltd., Hanoi, Vietnam. 151pp. + 31 col. pls.

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

2007.10.10 - 2023.06.30.