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Thread: Arhopala lurida hanging on in Singapore.

  1. #1
    Join Date
    Nov 2010
    Location
    Malaysia
    Posts
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    Default Arhopala lurida hanging on in Singapore.

    A recent observation has to be Arhopala lurida.

    Both A. atosia & lurida were recorded in the past in Singapore.
    Urbanisation & decreasing greenery mean small colonies soon disappear except in the central forested area.

    https://static.inaturalist.org/photo...1839/large.jpg
    https://www.inaturalist.org/observations/238870040

    The butterfly is very similar to A. pseudomuta .
    The key is that UnH spot 7 is inwards (towards the base) of spot 6 so that its inner margin is farther in.
    In A. pseudomuta spot 7 is directly above spot 6, its margins lies within that of spot 6.
    https://www.butterflycircle.com/chec...1---Horace.jpg

    Arhopala atosia.
    The postdiscal spots are almost the same colour as the ground & contrast little.
    Males.
    https://www.butterflycircle.com/chec..._atosia_02.jpg
    https://www.butterflycircle.com/chec..._atosia_01.jpg
    https://geenature.com/observations/61453176
    https://www.inaturalist.org/observations/228233363
    https://www.inaturalist.org/observations/61453173
    Male- left.
    https://www.inaturalist.org/observat...ity_assessment
    Male disc is large covering space 2 & 3 plus parts of space 1b & the cell.
    https://upload.wikimedia.org/wikiped...aMFUpUnAC1.jpg


    Arhopala lurida.
    Markings more contrasted & ground also typically darker.
    In Langkawi this is more obvious.
    https://www.inaturalist.org/observations/223492314
    https://thaibutterflies.com/Butterfl...hopala-lurida/
    This female below was corrected by Yutaka to A. lurida.See website.
    https://thaibutterflies.com/Butterfl...hopala-atosia/
    https://yutaka.it-n.jp/lyc4f/81820001.html
    Male with a smaller disc covering mainly space 2 & 3.
    https://en.wikipedia.org/wiki/Arhopa...daMUpUnAC1.jpg
    This male is wrongly labelled. It should have been A. lurida.
    https://ms.wikipedia.org/wiki/Arhopa...naMUpUnAC1.jpg
    These look correct as A. lurida.
    https://nlliew66butterflies.blogspot...da-corbet.html



    TL Seow: Cheers.
    Last edited by Psyche; 03-Sep-2024 at 06:26 AM.

  2. #2
    Join Date
    Nov 2010
    Location
    Malaysia
    Posts
    7,033

    Default Review

    https://static.inaturalist.org/photo...1839/large.jpg

    Although going by the key this comes out as Arhopala lurida, mainly because of the position of HW spot 7, a number of features suggest this may be merely a variant of Arhopala pseudomuta.

    These features are.
    1. It is a common feature in pseudomuta for the FW spot 4 to be strongly dislocated out.
    This much less in lurida.

    2. UnH spot 6 is rounded in pseudomuta but more angular in lurida.

    3. The green metalmark in pseudomuta is less sharp & flanked by a fuzzy strip.
    It is well-defined in lurida.


    Examples of A. pseudomuta.
    https://thaibutterflies.com/wp-conte...pseudomuta.jpg
    https://www.butterflycircle.com/chec...-%20Horace.jpg
    https://inaturalist-open-data.s3.ama...7583/large.jpg
    https://inaturalist-open-data.s3.ama...6356/large.jpg
    Examples of A. lurida.
    https://thaibutterflies.com/wp-conte...a-lurida-2.jpg
    https://thaibutterflies.com/wp-conte...ala-lurida.jpg
    https://yutaka.it-n.jp/npict14f/81820001_n001.jpg

    This individual have a number of unresolved uncertainties.



    TL Seow: Cheers.

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