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Thread: ID requested for Lycaenidae

  1. #1
    Join Date
    May 2018
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    India
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    Default ID requested for Lycaenidae

    Dear Sir/Madam,
    I am uploading one image for indentification purpose. Species captured for Jayanti river, Alipurduar, West Bengal, India in the month of April 2018. Extreemly sorry for poor quality image upload.

    Regards,
    Rajib Dey
    Mob.: +91-9831632692
    India
    Attached Images Attached Images

  2. #2
    Join Date
    Nov 2010
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    Malaysia
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    This looks to be a fairly typical male Nacaduba berenice. In your area should be ssp. plumbeomicans.
    Dark striae strong; FW band crooked; innermost costal spot present ;submarginal spots narrow, point acuminate .

    There is a lot of confusion with the 6Line Blues in ID.

    I'll start with the two easier ones.

    A. Larger size. Males with the dark striae within the white striae poorer. Females generally with better dark striae.
    Males termen(outer margin) straight.

    A1. Nacaduba beroe gythion : a ,Male with the dark striae very poor or obsolete. b. FW with the innermost costal spot above the midcell band absent.
    c. FW postdiscal band often dislocated in the middle; submarginal spots variable. d. wing base often dark in the male.
    Criterium b is about 98% certainty. Criteria a + b is absolute certainty.

    Males.
    https://www.ifoundbutterflies.org/me...9dbe22f4-1.jpg
    https://www.thaibutterflies.com/wp-c...e-1080x720.jpg

    Female.Note total absence of the innermost FW costal spot.
    https://www.ifoundbutterflies.org/me...0cfe1ecc-2.jpg


    A2. Nacaduba kurava. ssp. canaraica & euplea.Male with dark striae poorer.
    1. FW postdiscal band typically straight; 2. FW submarginal spots large, often blocky with rounded margins, ;HW spot 6 large quadrate.
    Male.
    https://www.ifoundbutterflies.org/me...gale_ah232.jpg
    https://www.ifoundbutterflies.org/me...6b23c9c1-1.jpg
    ssp euplea.Thailand
    https://www.thaibutterflies.com/wp-c...1-1080x720.jpg
    Female.
    https://www.ifoundbutterflies.org/me...7ff038d1-1.jpg
    https://www.ifoundbutterflies.org/me...kare_ar088.jpg
    https://www.ifoundbutterflies.org/me...Saji_ae302.jpg
    https://www.ifoundbutterflies.org/me...gale_ai374.jpg
    Last edited by Psyche; 02-Dec-2018 at 01:01 AM. Reason: typo

  3. #3
    Join Date
    Nov 2010
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    Malaysia
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    Default

    B: Dark striae well-developed in both sexes. Smaller.


    B1. Nacaduba berenice ssp ormistoni & plumbeomicans.Male FW with gently rounded termen (outer margin).Upperside pale blue with frosting (icing).
    FW postdiscal band crooked or dislocated; submarginal spots often narrow in male, irregular.

    Male.
    Singapore ssp icena.
    http://www.butterflycircle.com/check...hee%20Beng.jpg
    Thaialnd ssp aphysa.
    https://www.thaibutterflies.com/wp-c...e-1080x717.jpg
    India ssp ormistoni.
    https://www.ifoundbutterflies.org/me...ekar_ag319.jpg
    https://www.ifoundbutterflies.org/me...ekar_ag351.jpg
    https://farm4.staticflickr.com/3683/...9fca5207_b.jpg
    Male upperside blue with frosting.
    https://www.ifoundbutterflies.org/me...ekar_ag350.jpg
    Female Singapore ssp icena.
    https://c1.staticflickr.com/2/1740/4...b82f00d2_b.jpg


    B2. Nacaduba calauria ssp evansi & toxopeusi : Similar to N. berenice, dark striae strong in both sexes.
    1. Male FW more rounded. ; 2. FW postdiscal band typically straight . 3 . FW submarginal spot 4 & 5 usually broadly taper to a sharp point; the other spots not so pointy;
    Can be very difficult to separate from N. berenice. Male upperside dark violet blue without frosting.
    Male.
    https://www.ifoundbutterflies.org/#!...aduba-calauria
    Singapore 2 males & female ssp malayica.
    https://wanderingbutterflyeffect.fil...b3ad98860e.jpg
    https://static.inaturalist.org/photo...jpg?1497763633
    http://www.butterflycircle.com/check...yica---2--.jpg


    TL Seow: Cheers.
    Last edited by Psyche; 02-Dec-2018 at 01:03 AM. Reason: clarification

  4. #4
    Join Date
    May 2018
    Location
    India
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    Default

    Thank you Sir for your valued information.

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