♂, Satun (Koh Tarutao), Thailand.		♀, Satun (Koh Tarutao), Thailand.
♂, Pattani, Thailand.		♂, Ranong, Thailand.

ON : Euthalia phemius ipona Fruhstorfer, 1913 OD : In: Seitz, Gross-Schmetterl. Erde 9:675. TL : "Perak" [Perak, W.Malaysia]. (NHML) Distribution : P.Thailand (South from Ranong), Langkawi, W.Malaysia. ● ssp.phemius ● ssp.ipona

Euthalia phemius corbeti Pendlebury, 1939 : J. Fed. Malay St. Mus. 18(3): 389-390, pl.6, fig.15,♂. TL. "Malaya, West Coast: Langkawi Islands" [Langkawi Islands, W.Malaysia]. (NHML)

ipona : Syntype ♂, 'Cunong Ijan', Perak, Malaysia (NHML) ; Yago et al.,2012 : 306, figs.3A♂,3B♂(Un).
corbeti : Holotype ♂, Langkawi Islands, Malaya. (NHML)

[ THAILAND ]
Euthalia ipona ; Pinratana,1979 : 76, figs.N132,♂,♀,♀(Un). (Nakhon Sri Thammarat; Satun; Ranong; Yala)
Euthalia ipona ; Pinratana & Eliot,1996 : 78, pl.78, figs.144,♂,♀. (Nakhon Sri Thammarat; Satun; Ranong; Tarutao Is.)
Euthalia ipona ; Ek-Amnuay,[2007] : 442, pl.195, figs.N151,♂,♂(Un),♂(Un),♀,♀(Un). (Koh Tarutao; Muang Shone)
Euthalia ipona ; Les Day,2011-2022 : Samui Butterflies, figs.♂,♀,♀(Un). (Koh Samui; Koh Phangan) (accessed: 2021.07.23)
Euthalia ipona ; Ek-Amnuay,2012 : 452, pl.199, figs.N317,♂,♂(Un),♂(Un),♀,♀(Un). (Koh Tarutao; Muang Shone)
Euthalia phemius phemius ; Kimura et al.,2016 : 107, figs.♂,♂(Un),♂,♂(Un),♀,♀(Un). (Khlong Naka; Tarutao; Than To WF.) (in part)
Euthalia phemius ipona ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2024- : Butterflies of Thailand, figs. (Krabi) (accessed: 2024.05.13)

[ THAILAND ]
Ranong : 2♂.

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Surat Thani (Koh Phangan dist.) : 1♂ (photo by A.Giudici).

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Nakhon Si Thammarat : 1♂ 1♀ (photo & photo by A.Giudici).

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Pattani : 1♂.

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Satun (Koh Tarutao) : 2♂ 1♀.

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The butterfly is not uncommon in montane forest at low to moderate elevations (Alt. 30 - 550m).
Yago et al. (2012) identified ipona as a form of the nominotypical subspecies based on both morphology and molecular analysis. However, in peninsular Thailand, only the ipona form is found in both males and females, and these are stable. In the Malay Peninsula, individuals that are indistinguishable from the nominotypical subspecies seem to occur very rarely in mountainous areas. It is possible that this is a regressed and relict form inhabiting mountainous areas, whereas ipona may be a population inhabiting mainly lowland areas. The ratio of these forms to each other needs to be examined. I tentatively treat the populations from P.Thailand to W.Malaysia as ssp.ipona. Further taxonomic study is needed.

Fruhstorfer, H.,1913 : 6. Familie: Nymphalidae. In: Seitz, A. (Ed.), Die Gross-Schmetterlinge der Erde.
9: 665-680. (13.Jan.1913), Stuttgart, Alfred Kernen.

Pendlebury, H.M.,1939 : Notes on some new or little-known Malaysian Butterflies.
J. Fed. Malay St. Mus. 18(3): 380-394, pl.6.

Yago, M., Yokochi, T., Kondo, M., Braby, M.F., Yahya, B., Peggie, D., Wang, M., Williams, M., Morita, S. & Ueshima, R.,2012 :
Revision of the Euthalia phemius complex (Lepidoptera: Nymphalidae) based on morphology and molecular analyses.
Zool. J. Linn. Soc. 164: 204-324.

♂, Surat Thani (Koh Phangan), Thailand. (photo by A.Giudici)	♀, Nakhon Si Thammarat, Thailand. (photo by A.Giudici)
♂, Nakhon Si Thammarat, Thailand.

2007.02.10 - 2024.05.31.