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Thread: Is this a Nacaduba beroe?

  1. #1
    Join Date
    Apr 2014

    Default Is this a Nacaduba beroe?

    Is this a Nacaduba beroe?

  2. #2
    Join Date
    Nov 2010


    Ionolyce helicon.

    Ionolyce was formerly considered as a synonym of Nacaduba.

    In Singapore the 6Line Blues can be problematic.
    With small colonies a single crossing can affect the appearance within a few generatios.
    In a large colony the effect will soon be diluted overtime., resulting in only minor variations.

    I helicon typically have the FW postdiscal band serially dislocated at every vein, the last spot 3 is shifted in.
    Most of the submarginal spots on the HW are V-shaped.
    Variations occur.
    Typical male.
    Female is often misIDed as N. beroe.

    Nacaduba beroe.
    FW without the innermost costal spot.
    FW postdiscal band typically broken in the middle at vein 5 (FW postdiscal band composed of 4 spots)
    FW margin slightly rounded.
    Typical male.
    Male often only retain one costal spot 9.
    Female is often confused with Ionolyce but lowermost FW postdiscal spot 3 not shifted in.
    Female below.
    Unusual female with blocky submarginal spots. (Have upperside confirmation)

    Nacaduba kurava.
    Sometimes the innermost costal spot is missing, confusing it with N. beroe.
    The male have distinctly straighter FW margin than the males of the other three species, beroe, calauria & berenice.
    FW postdiscal band typically straight. FW submarginal spots 4 & 5 always rounded.
    It is unknown for the male to lose 2 costal spots & have only one, as in beroe.
    Male without the innermost costal spot. Note the less straight margin, suggesting hybrid.
    Typical males with straight margins.
    Male with the submarginal spots narrow.
    Females have more rounded FW upper submarginal spots.

    N. berenice .
    May occasionally lose the innermost costal spot, but have prominent dark striae.
    FW postdiscal band typically broken or crooked.
    Typical female.
    Unusual female with postdiscal band serially dislocated, but note lowest spot 3 shifted out ,not in.

    N. calauria.
    FW submarginal spots 4 & 5 more pointed, triangular than the rest.
    FW postdiscal bnad usually very straight.
    Male left, female right.

    TL Seow: Cheers.
    Last edited by Psyche; 27-Oct-2021 at 07:31 AM.

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