♀, Krabi, Thailand. (photo by K.Saito)

ON : Troides aeacus form malaiianus Fruhstorfer, 1902 OD : Soc. ent. 17(8):57. TL : Perak, Malaysia. Distribution : P.Thailand, Langkawi, W.Malaysia. ● ssp.aeacus ● ssp.malaiianus

[ THAILAND ]
Papilio aeacus thomsoni [sic] : Godfrey,1930 : 206. (Nakhon Sri Thammarat: Wat Kiriwong)
Papilio aeacus thomsoni [sic] : Godfrey,1932a : 263. (P)
Troides aeacus thomsoni [sic] ; Pinratana,1977 : 6, figs.P3c♂,♀. (P)
Troides aeacus thomsonii ; Ohya,1983 : 297. (P)
Troides aeacus malaiianus ; Haugum & Low,1985 : 338. (P)
Troides aeacus thomsoni [sic] ; Pinratana & Eliot,1992 : 11,39, pl.6, figs.3b♂,♀. (no loc.)
Troides aeacus aeacus ; Matsuka,2001 : 189. (P)
Troides aeacus malaiianus ; Ek-Amnuay,[2007] : 62, pl.2, figs.P4b♂,♀. (Krabi)
Troides aeacus malaiianus ; Racheli & Cotton,2010 : 22-24. (P.Thailand)
Troides aeacus malaiianus ; Kimura et al.,2011 : 112. (by literature)
Troides aeacus malaiianus ; Ek-Amnuay,2012 : 62, pl.2, figs.P4b♂,♀. (Krabi)

[ THAILAND ]
Surat Thani (Koh Tao) : 1♂ 2♀ (photo by P.Kosierb).

Jan

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Dec

Krabi : 1♀ (photo by K.Saito).

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The butterfly is rather localized and uncommon in P.Thailand.
The records and photos from Phang Nga, P.Thailand in Küppers & Janikorn (2017) are interesting. Female photos of Pa-051 and 052 are definitely ssp.aeacus, but Pa-049 appears to be slightly closer to ssp.malaiianus. Regarding the presence of the nominotypical subspecies in the Phang Nga area, I am considering the possibility that ssp.aeacus bred at the butterfly farm may have escaped and is breeding there. Further distributional research with reliable specimens is needed.

Fruhstorfer, H.,1902 : Troides amphrysus gardineri nom. nov.
Soc. ent. 17(8):57.

Ohya, T.,1983 : Birdwing Butterflies
Kodansha, Tokyo. 331 pp, 136 pls.

Haugum, J. & Low, A.M.,1985 : A Monograph of the Birdwing Butterflies. Vol.2, part.3. Troides; helena & aeacus groups
E.J.Brill. Scandinavian Science Press LTD. Leiden, Copenhagen.

Matsuka, H.,2001 : Natural History of Birdwing Butterflies
Matsuka shuppan. 367 pp.

1996.09.26 - 2021.11.30.