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Thread: Please help to ID

  1. #1
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    Default Please help to ID

    Photos recorded in Singapore.

    1. Arhopala major?
    Arhopala.jpg

    2. Nacaduba sanaya?
    Nacaduba.jpg

  2. #2
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    1. Arhopala epimuta.
    FW with spot 4 dislocated & displaced outwards; HW postdiscal spot 6 astride spot 5 & the cellend bar; HW tornus with a white cilial dot.


    2. is rather tricky ; Dark striae within bands obsolete.
    HW postdiscal band in space 4 well separated from the submarginal spot ; in space 5 they are close.
    FW postdiscal band straight & without dislocation.

    The appearance is very similar to a female N. sanaya but all sanaya have the FW postdiscal band broken at vein 6.
    Male & 3 female N. sanaya showing the FW band dislocated at vein 6.
    http://1.bp.blogspot.com/-XEY63bA0JP...aya+elioti.jpg
    http://2.bp.blogspot.com/-TbqxcQ50Sh...Line+Blue).jpg
    http://3.bp.blogspot.com/-Og2S_eim3u...BBlue%2529.jpg
    http://www.butterflycircle.com/check...race%20tan.jpg

    That leaves only two possibilities .N. pendleburyi & N. solta.

    N. pendleburyi recorded in Singapore but I can't locate the correct image anymore.
    This BOLD image is actually that of N. pactolus.
    http://v3.boldsystems.org/index.php/...e?taxid=312959

    In any case the FW band in N. pendleburyi is curved whereas this is very straight.
    This suggest it may be N. solta which would be a new record.

    N. solta male ? Borneo.
    https://farm5.static.flickr.com/4061...2ba53fcd7c.jpg


    TL Seow: Cheers.

  3. #3
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    There are a lot of variations in each species & the key features are not precise.
    Looking thru the Bornean Nacadubas N. solta is out of the picture as the HW submarginal spots & the postdiscal band/spots are widely separated.

    It resembles N. hermus closely.


    TL Seow: Cheers.

  4. #4
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    Could it be an aberration for a N.sanaya as we found another N.sanaya nearby.
    WhatsApp Image 2019-06-25 at 16.33.07.jpg

  5. #5
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    Post 4.

    None of the features are absolute so it could still be a female N. sanaya.

    Your post 4 image raised more question as the HW postdiscal band & the submarginal spots in space 4 & 5 are so close it suggest N. subperusia lysa, a species recorded from Singapore.


    N. pendleburyi is unlikely as the submarginal spots are narrow so that postdiscal & submarginal spots are widely separated.


    Of the three N. sanaya, hermus ,& subperusia all recorded in the past, the defining feature is.

    N. sanaya :postdiscal band/pots & submarginal spots separated by at least 1/2 the width of the postdiscal band in space 4 & 5.

    N. hermus & subperusia lysa ;HW postdiscal & submarginal spots very close ,almost touching.

    As can be seen in sanaya & hermus this key feature is variable, possibly so too in subperusia.


    N. hermus nearly always have metallic scales on the black tornal spot.
    P.Malaysia.
    https://3.bp.blogspot.com/-oYUpNLP4n...0/DSC_2636.JPG
    India.
    https://www.ifoundbutterflies.org/sp...acaduba-hermus
    female
    https://www.ifoundbutterflies.org/me...74adcf69-1.jpg

    This unIDed Singapore image is obviously male N. hermus.
    https://farm4.static.flickr.com/3604...ce508afc_o.jpg



    Nacaduba subperusia lysa. Similar to N. hermus but lack metallic scales in black tornal spot.
    Male.P.Malaysia
    http://3.bp.blogspot.com/-CCzm1ZlQsQ...rusia+lysa.jpg
    https://3.bp.blogspot.com/-Bi5kACOeX...0/DSC_2626.JPG
    Probable female
    Thailand.
    https://thaibutterflies.com/wp-conte...s-1080x731.jpg
    Cambodia.
    https://farm5.staticflickr.com/4569/...8cfa17b6_b.jpg


    Best to leave it as ?N. sanaya until there are definitive examples.


    TL Seow: Cheers.
    Last edited by Psyche; 27-Jun-2019 at 12:26 AM.

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