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Thread: A swift sp. from n Thailand

  1. #1
    Join Date
    Dec 2016
    Location
    Thailand
    Posts
    155

    Default A swift sp. from n Thailand

    I'd be grateful to know what genus this species of skipper from south of Chiang Mai is. I have reviewed images of Panara, Polytremis etc that I can find on the web, but none seems to show a heavily barred abdomen with two spots in the outer forewing (most have three at least). Maybe I am looking at a wrong genus?
    Thanks.

    IMG_0229.JPG

  2. #2
    Join Date
    Nov 2010
    Location
    Malaysia
    Posts
    4,494

    Default

    The orange-tipped antenna with a pale spot indicate the Halpe group of which Thoressa is typical.

    Two species in Thailand are very vsimilar.

    T. hyrie have the FW cellspots fully merged into one, while in T. fusca they are more or less separared.
    From the underside alone it seem impossible to tell them apart.
    http://yutaka.it-n.jp/hes/91225001.html
    http://yutaka.it-n.jp/hes/91245001.html

    The spots varies. It seem the abdomen in T. hyrie is less heavily dark-banded.
    https://www.thaibutterflies.com/wp-c...1-1080x675.jpg
    http://www.ifoundbutterflies.org/med...503cbb02-1.jpg

    This suggest this is Thoressa fusca. Fusca also means dark.

    TL Seow: Cheers.

  3. #3
    Join Date
    Dec 2016
    Location
    Thailand
    Posts
    155

    Default

    Thank you for the very useful pointers.

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