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Thread: Ypthima akbar or Y. watsoni

  1. #1
    Join Date
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    Default Ypthima akbar or Y. watsoni

    Photographed at Chiang Dao, n. Thailand yesterday.

    This should be either Y. akbar or Y. watsoni. But which?

    Usually on images of akbar the hindwing ocelli are absent and there are two fairly prominent discal and post discal bands, lacking on this individual.

    The fairly even size of the apical spot and spot 2 could refer to either, but rules out Y. confusa.

    Thoughts appreciated. My leaning is toward Y. akbar, though the prominent ocelli I have not seen before.

    IMG_6829.JPG

  2. #2
    Join Date
    Nov 2010
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    Default

    I think you are confusing the HW apical spot with the FW spot.

    Ignoring the FW spot.
    Uemura states in Y. confusa HW apical spot (ie spot 6 (in space 6))is much larger than spot 2 ( spot in space 2).
    The 3rd spot is in space 1b.
    HW without a dark fascia.
    https://www.thaibutterflies.com/Butt...8%A5%E0%B8%B2/
    https://wingscales.com/nymphalidae/Ypthima-confusa

    Y. watsoni: HW apical spot variably larger than spot 2 or about equal. HW with a dark discal fascia.
    Fig 4, a, b&c dsf.
    https://archive.org/stream/lepidopte.../n188/mode/1up
    http://data.nhm.ac.uk/dataset/collec...%3Anymphalidae

    Y. akbar ;HW with dark faciae, no or vestigial spots.
    http://www.samuibutterflies.com/02_i...imaakbar.v.jpg

    It should be Ypthima watsoni.

    TL Seow: Cheers.

  3. #3
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    Default

    Many thanks. Very clear.

  4. #4
    Join Date
    Oct 2017
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    Singapore
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    Default

    Dear Dr Seow,

    Could this be a Y. akbar? I shot it at Chiang Doi over a year ago but could not ID it. Thanks.

    IMG_1987v1.1.jpg

    Best regards,
    David Chan

  5. #5
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    Default

    Post 4.
    Yes it looks the same as Ypthima akbar.


    TL Seow: Cheers.

  6. #6
    Join Date
    Oct 2017
    Location
    Singapore
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    Default

    Hi Dr Seow,

    Thanks for the pointers above and the confirmation.

    Best regards,
    David Chan

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