♂, Ranong, Thailand.

ON : Itys iadera Nicéville, 1895 OD : J. Bombay nat. Hist. Soc. 9(4):379, pl.Q, fig.52,♂. TL : Penang, Malay Pen. (♂) ; Battak Mountains, N.E.Sumatra. (♂, NZC) Distribution : Thailand, S.Vietnam, W.Malaysia, Borneo, Sumatra, Siberut Is., Banka, Java, Bali.

Sepa ciliata Elwes & Edwards, 1897 : Trans. zool. Soc. Lond. 14(4):214, pl.19, fig.22,♂. TL. Pulo Laut, Borneo. (♂, NHML)

iadera  ; ♂ Type, Sumatra. (NZC) ; Sheela et al.,2019 : 29, figs.♂,♂(Un).

[ THAILAND ]
Hyarotis iadera ; Pinratana,1985 : 73, pl.25, figs.154,♂,♂(Un). (Chanthaburi; Ranong)
'Hyarotis iadera ; Ek-Amnuay,[2007] : 794, pl.365, fig.H180,♂(Malaysia).'
Hyarotis iadera ; Kimura et al.,2011 : 74, figs.♂,♂(Un). (Ranong Hot Spring; Muang Shone; Khlong Naka)
'Hyarotis iadera ; Ek-Amnuay,2012 : 852, pl.393, fig.H177,♂(Malaysia).'

[ VIETNAM ]
Hyarotis iadera ; Devyatkin & Monastyrskii,2003 : 125. (S: Cat Tien)
Hyarotis iadera ; Miyazaki, Saito & Saito,2007b : 14, figs.H-82,♂,♀. (Lam Dong: Dambri)
Hyarotis iadera ; Monastyrskii & Devyatkin,2015 : 80. (C: Lam Dong)

[ THAILAND ]
Ranong : 1♂.

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The butterfly is uncommon in montane forests at low elevations (Alt. 30 - 150m). Further distributional research is needed.

Nicéville, L.de,1895 : On new and little-known Butterflies from the Indo-Malayan Region.
J. Bombay nat. Hist. Soc. 9(4):366-410, pl.N-Q.

Elwes, H.J. & Edwards, J.,1897 : A Revision of the Oriental Hesperiidae.
Trans. zool. Soc. Lond. 14(4):101-324, pls.18-27.

1999.09.11 - 2023.08.31.