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Thread: ID help needed for Arhopala

  1. #1
    Join Date
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    Seng Kang
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    Default ID help needed for Arhopala

    Dear Dr Seow,
    Is this Arhopala sihetensis adorea? Thanks!
    A2b.JPG
    Cher Hern

  2. #2
    Join Date
    Nov 2010
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    Malaysia
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    Default

    Yes, it is A. silhetensis ardorea. Correction: Arhopala athada.

    Some examples of A. silhetensis have HW spot 6 broader, astride spot 5 & cellend bar & is very similar to A. athada.
    See the last female from Ranong.
    http://yutaka.it-n.jp/lyc4/82240010.html

    However A. silhetensis also have the FW top submarginal spot more strongly dislocated with a distinct step on the outer border.
    http://www.butterflycircle.com/check...20-%20khew.jpg
    http://www.butterflycircle.com/check...-%20horace.jpg
    https://singapore.biodiversity.onlin...0097?imageId=1

    A. athada have HW spot 6 blocky & astride spot 5 & cellend bar.
    FW topmost submarginal spot less dislocated.
    http://www.butterflycircle.com/check...-%20horace.jpg
    https://ms.wikipedia.org/wiki/Arhopa...thadaMUpUn.jpg
    https://1.bp.blogspot.com/_rzo8wjfyC..._adult_m_3.jpg


    TL Seow: Cheers.
    Last edited by Psyche; 25-Jul-2021 at 01:53 AM.

  3. #3
    Join Date
    Nov 2010
    Location
    Malaysia
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    Default

    Correction.

    Much more likely to be Arhopala athada athada.
    There is probably some hybrid element here.

    However A. silhetensis is a very large species & the bands are far apart.

    A. silhetensis.
    On the FW the postdiscal & submarginal bands are 2- 2.5 X the width of the postdiscal band apart.
    https://species.wikimedia.org/wiki/A...eaMUpUnAC1.jpg
    http://www.butterflycircle.com/check...-%20horace.jpg


    A. athada is usually a smaller species & the postdiscal band tend to be wider.
    FW postdiscal & submarginal bands about 1- 1.5 X the width of the postdiscal band apart.
    https://ms.wikipedia.org/wiki/Arhopa...thadaMUpUn.jpg
    http://www.butterflycircle.com/check...-%20horace.jpg


    TL Seow; Cheers.
    Last edited by Psyche; 27-Jul-2021 at 08:22 PM.

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