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Thread: Request for ID

  1. #1
    Join Date
    Jul 2017
    Location
    Singapore
    Posts
    32

    Default Request for ID

    Dr Seow, need your guidance to ID this butterfly. Taken at Upper Seletar Reservoir. Thanks.

    Regards
    Samuel
    Attached Images Attached Images

  2. #2
    Join Date
    Aug 2007
    Location
    Upper Changi
    Posts
    2,590

    Default

    Male Nacaduba beroe neon, from the absence of the lowermost costal spot on the forewing
    Aaron Soh

  3. #3
    Join Date
    Nov 2010
    Location
    Malaysia
    Posts
    4,304

    Default

    Agreed it is male Nacaduba beroe neon here.
    A word of caution on relying on just one features for ID.
    In Singapore where there are only small separated colonies of species any crossing between closely related species may result in an abnormal feature in the colony far longer or more permanent.
    Where the colony is large an inherited feature from a cross will overtime be diluted & may died out.


    The features of the male Nacaduba beroe neon (not applicable to the female).
    1. Dark striae or lines within the bands obsolete or weak.
    2. Lowest FW costal spot absent.
    3. Wingbases darkened variably.
    4. Upperside deeper violet blue without a frosted appearance.
    Typical males Singapore.
    https://wanderingbutterflyeffect.fil...f39fce860b.jpg
    http://1.bp.blogspot.com/-xhPzgiOQMi...-Line-Blue.jpg
    http://www.butterflycircle.com/check...imon%20Sng.jpg
    Typical N. beroe ,Malaya.
    http://1.bp.blogspot.com/-et_aVVQw8e...0/DSC_0015.JPG
    http://4.bp.blogspot.com/-yS0EBTwvFo...0/DSC_0105.JPG
    http://farm7.static.flickr.com/6186/...62cac367_b.jpg


    The features of the msle Nacaduba berenice icena .
    1. Dark striae/lines within the bands strongly developed.
    2. Lowest FW costal spot present.
    3. Wingbases not darkened.
    4. Upperside a frosted lavender blue.
    http://www.butterflycircle.com/check...drick%20Ho.jpg
    http://www.butterflycircle.com/check...hee%20Beng.jpg
    http://www.butterflycircle.com/check...obby%20Mun.jpg


    Considered this shot of a male taken by Federick ,Lornie Trail, 2014,
    http://3.bp.blogspot.com/-m0mSgms7_-...a+berenice.jpg
    http://2.bp.blogspot.com/-2z1tHnAAtb...8male%2529.jpg

    The underside have the black striae strongly developed but the lowest costal spot is missing.
    The upperside is a frosted lavender blue of N. berenice.

    The frosted blue appearance is due to the presence of long white ribbon scales (present only in the male berenice & sex-determined).

    Thus this male is definitely N. berenice icena .
    It may have a hybrid element or just that occasionally in berenice the lowest costal spot is absent.


    TL Seow: Cheers.

  4. #4
    Join Date
    Jul 2017
    Location
    Singapore
    Posts
    32

    Default

    Thanks Aaron 😀

  5. #5
    Join Date
    Jul 2017
    Location
    Singapore
    Posts
    32

    Default

    Thanks Dr Seow 😀

  6. #6
    Join Date
    Aug 2007
    Location
    Upper Changi
    Posts
    2,590

    Default

    Yes, Federick's shot does look exceptional
    Aaron Soh

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