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Thread: Skipper ID request

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  1. #1
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    Dear Doctor Seow,
    I was scrolling through forums and was reading the ID features for amathusia species, would this, based on the notched 4th brown bae in between the veins, be a bicolor palm king?
    Inat link - https://www.inaturalist.org/observations/143724495

    Skipping regards
    Zicky
    Zick Soh

  2. #2
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    Post 119.

    Yes. This would be Amathusia friderici.
    Since it feeds on the common oil palm it is not rare in P. Ubin.

    The other species of Amathusia are very similar & difficult to separate..

    A. binghami looks very similar ,the median band is broad & more reddish. The upperside with more dusky orange markings.
    https://www.pbase.com/lcgoh/image/155684525

    A. masina is deep reddish brown ,the paler postdiscal band is also solid, without a colour break in the middle of the band.
    https://inaturalist-open-data.s3.ama...9390/large.jpg


    Amathusia perakana have the HW 4th band often completely broken , with separated spots.
    In addition the male have sharper FWs.
    Males.
    https://farm1.staticflickr.com/618/2...ac383a60_b.jpg
    https://thaibutterflies.com/wp-conte...a-perakana.jpg

    The recent observation from Kent Ridge is definitely not A. phidippus.
    https://static.inaturalist.org/photo...502/large.jpeg
    It looks like a female A. perakana.
    The FW is not sharp as in the male.
    However, there are examples of A friderici from Ubin having the HW 4th band very narrow & broken.
    So it is uncertain whether this is A.perakana or friderici.


    TL Seow: Cheers.

  3. #3
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    Dear Doctor Seow,

    i was looking through inat and i realise there are two species of white tipped skipper,Erionota hiraca and Erionota acroleuca. Do you know what are the differences or why is there a species shift which i may have missed out?

    Skipping regards
    Zicky
    Zick Soh

  4. #4
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    Post 121.

    As often in taxonomy there are a lot of shifts & turns, & this one have a fair bit.

    1881 Wood-Mason & De Niceville described taxon acroleucus from the Andamans.

    In the same year (1881) Moore also described a male as hiraca from the Andamans.

    de Jong & Treadaway in 1992 thought Moore', name have priority, but this was later proven wrong by later researchers.

    Thus the correct name would have been Erionota acrolueca (gender shift to feminine gender).Synonym hiraca.


    Semper described taxon apex from Luzon, Philippines in 1892.
    This was considered a subspecies of acroleuca.
    This taxon apex was applied to all the forms in SE Asia.
    Evans described taxon apicalis from Bassein ,Myanmar in 1932, & this name falls as a synonym of apex.

    de Jong & Treadaway 1992 judged taxon apex to be distinct & different from the mainland population, elevating it to a new species.

    The population in SE Asia is given the next available name ,ie Evans' apicalis.
    Thus the population from SE Asia becomes Erionota acroleuca apicalis.


    Some researchers also suggest the mainland population (taxon apicalis ) is different from that in the Andamans (taxon acroleuca.).
    Thus the current situation if verified by DNA analysis.

    1. Erionota acroleuca (= hiraca ). Andamans.
    Note HW patch is very broad.
    https://www.ifoundbutterflies.org/si...3c185ca6-1.jpg


    2. Erionota apicalis SE. Asia including NE India.
    http://yutaka.it-n.jp/hes/92340010.html
    As E. apex following Evans' 1946 revision.
    https://www.ifoundbutterflies.org/si...abb545-1_0.jpg
    Cambodia.
    https://inaturalist-open-data.s3.ama...113/medium.jpg


    3. Erionota apex. Phillipines.



    Currently here, this is best left as Erionota acroleuca apicalis unless later research into genetics prove otherwise.


    TL Seow:Cheers.
    PS. Note taxon = taxonomic name.
    Last edited by Psyche; 10-Dec-2022 at 07:53 AM.

  5. #5
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    Dear Doctor Seow,

    i have a few skipper i would like confirmation for.

    1 - P.omaha?
    inat link - https://www.inaturalist.org/observations/144145310

    2 - P.omaha?
    inat link - https://www.inaturalist.org/observations/144145286

    3 - telicota colon?
    inat link - https://www.inaturalist.org/observations/143486761

    4 - telicota besta?
    inat link - https://www.inaturalist.org/observations/143486729

    thats all

    skipping regards
    Zicky
    Zick Soh

  6. #6
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    Post 123.

    1. Potanthus trachala. male.
    FW spot 4 7 5 no overlap.

    2. Potanthus omaha. male

    3. Telicota besta female.
    HW veins lightly dark-dusted.

    4. Telicota linna female.
    HW veins not dark dusted.


    TL Seow; Cheers.

  7. #7
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    Dear Doctor Seow,

    Another few skippers!

    1 - pelopidas mathias?
    inat link - https://www.inaturalist.org/observations/144291328

    2 - borbo cinnara?
    inat link - https://www.inaturalist.org/observations/144291326

    3 - oriens gola?
    inat link - https://www.inaturalist.org/observations/144291330

    skipping regards
    Zicky
    Zick Soh

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