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

ON : Zeuxidia amethystus Butler, 1865 OD : Proc. zool. Soc. Lond. 1865(2):485. TL : Sumatra. (NHML) Distribution : P.Thailand (Phetchaburi and Southward), Langkawi, W.Malaysia, Tioman, Singapore, Sumatra.

Zeuxidia amethystus amethystus f.prodigiosa Fruhstorfer, 1911 : in Seitz, Grossschmett. Erde 9:435. TL. W.Sumatra ; Malay Pen.

[ THAILAND ]
Zeuxidia amethystus amethystus ; Pendlebury,1923 : 34. (Nakhon Sri Thammarat: Khao Ram; Khao Luang)
Zeuxidia amethystus amethystus ; Godfrey,1930 : 260-261. (Nakhon Sri Thammarat: Khao Ram; Khao Luang; Pattani: Khao Kalakiri)
Zeuxidia amethystus amethystus ; Godfrey,1932a : 267. (P)
Zeuxidia amethysta [sic] amethysta [sic] ; Pinratana,1983 : 54, 63, pl.39, figs.17b♂,♀. (Krabi; Ranong; Phang Nga; Phuket; Nakhon Sri Thammarat; Trang; Yala; Narathiwat)
Zeuxidia amethysta [sic] amethysta [sic] ; Ek-Amnuay,[2007] : 330, pl.139, figs.A19,♂,♂(Un),♀,♀(Un). (Krabi; Than To)
Zeuxidia amethystus amethystus ; Ek-Amnuay,2012 : 332, pl.139, figs.N166,♂,♂(Un),♀,♀(Un). (Krabi; Than To)
Zeuxidia amethystus amethystus ; Les Day,2011-2022 : Samui Butterflies, fig.♂(Un). (Koh Samui; Koh Phangan) (accessed: 2021.12.18)
Zeuxidia amethystus amethystus ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2015- : Butterflies of Thailand, figs. (Nakhon Si Thammarat; Yala; Narathiwat) (accessed: 2023.06.03)
Zeuxidia amethystus amethystus ; Kimura et al.,2016 : 148, figs.♂,♂(Un),♂,♂(Un),♂,♂(Un),♀,♀(Un),♀,♀(Un). (Ranong; Kam Puan; Muang Shone; Khlong Naka; Ka Chong; Than To WF.)
Zeuxidia amethystus amethystus ; Küppers & Janikorn,2017 : 291-291, figs.Abb.M-061-062 ; Hab.M-063-064. (Phang Nga)

[ THAILAND ]
Phetchaburi : 2♂ 1♀ (photo by T.Aoyama and M.Hayashi).

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Ranong : 15♂ 8♀.

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

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Yala : 1♂ 2♀ (photo and photo by S.Atdhabhan).

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The butterfly is common in montane dense forests mixed with bamboo at low to moderate elevations (Alt. 50 - 500m) and often comes to rotten fruits that has fallen to the ground. They prefer in the dark jungle and suddenly fly out from below and quickly fly away into the bush.

The difference between masoni and ametystus
masoni ♂, UpH. brand without hairtuft in cell	ametystus ♂, UpH. brand with hairtuft in cell

Butler, A.G.,1865 :
Description of the Characters of six new Species of rhopalocerous Lepidoptera in the Collection of the British Museum, with Notes on the allied Species.
Proc. zool. Soc. Lond. 1865(2):481-486.

Fruhstorfer, H.,1911 : 5. Familie: Amathusiidae in Seitz, Gross-Schmett. Erde 9
433-440. (30.Aug.1911)

♂, Nakhon Si Thammarat, Thailand. (photo by A.Giudici)	♀, Yala, Thailand.
♀, Yala, Thailand. (photo by S.Atdhabhan)
♂, Phetchaburi, Thailand. (photo by T.Aoyama)	♂, Phetchaburi, Thailand. (photo by T.Aoyama)

2007.10.10 - 2023.06.30.