Results 1 to 5 of 5

Thread: Caltoris bromus bromus.

  1. #1
    Join Date
    Nov 2010
    Location
    Malaysia
    Posts
    6,846

    Arrow Caltoris bromus bromus.

    A revision.

    Evans state of C. bromus, that the female have 1- 2 HW spots.
    this was taken to meant that the Male do not have HW spots.

    C&P 4's key actually do not state the sex, indicating that the male may also have HW spots.
    Yutaka website shows a male with two Hw spots.The female with one.
    https://yutaka.it-n.jp/hes/93320001.html

    A recent expedition to Nepal shows both sexes of C. bromus bromus have two HW spots.
    https://www.researchgate.net/figure/...fig4_363417945

    Caltoris bromus bromus.
    Antennae with prominent pale areas.
    [/I]FW with two cellspot usually large, SUbapical spots large often two, sometime three.
    HW dark brown overlaid with ochreous scales ,generally contrasting little with the FW


    Most males in Singapore have no HW spots .
    Typical males C. bromus bromus.
    https://www.inaturalist.org/observations/184641820
    https://www.inaturalist.org/observations/131436413
    https://www.inaturalist.org/observations/38212403
    Just a tiny white dot in HW space 2.
    https://www.inaturalist.org/observations/149217007

    Males with definite HW spots are known.
    HW is somewhat reddish which is confusing.
    https://www.inaturalist.org/observations/189748177
    This was thought to be a female back then, but the wingshape is male.
    https://www.inaturalist.org/observations/38174859


    The female more often have a HW spot in space 2.
    No examples with two spots are seen.
    https://www.inaturalist.org/observations/13664032
    https://www.inaturalist.org/observations/189751484

    These should be correct as females without any hW spot.
    https://www.inaturalist.org/observations/114602509
    https://www.inaturalist.org/observations/14127347


    Fieldshot ID can be very difficult as the colour keeps on varying.

    C. cormasa is the most confusing.
    Generally this is redder ,HW deeper reddish & contrasted, FW subapical always small ,upper cellspot small.
    Two males 1 female.
    https://inaturalist-open-data.s3.ama...1898/large.jpg
    https://2.bp.blogspot.com/-TjKxWVHrQ...herHern_01.jpg
    https://www.butterflycircle.com/chec...obby%20Mun.jpg


    Two fieldshots in which the HW have multiple spots are intriguing .
    They appear to be Caltoris, with pale areas on the antennae & largish spots.
    They also do not match any other genera.


    1.https://www.inaturalist.org/observations/13297994
    The HW is very dark brown ie chocolate & would suggest C. cahira, but cahira is stated never to have any HW spots.

    2. https://www.inaturalist.org/observations/96995697
    This suggest Pelopidas but it does not match any known species & the HW lacks a cellspot.


    TLSeow: Cheers.

  2. #2
    Join Date
    Nov 2010
    Location
    Malaysia
    Posts
    6,846

    Post

    Finally a male Caltoris bromus showing two UnH white spots in space 2 & 3.
    https://www.inaturalist.org/observations/122789866



    TL seow: Cheers

    PS. All the males with UnH white spots have the UnH ground colour very dark brown as in C. cahira.
    As stated earlier, cahira is specifically stated to have no UnH white spot.
    This raise the question if it is possible that Singapore have a unique population of C. cahira that may have UnH spots
    Or perhaps it is an endemic new species.
    This question can only be answered if some specimens are taken & the genitalia examined or DNA analysis is done.
    Based on the key of the reference text, these are considered to be C, bromus .
    https://yutaka.it-n.jp/hes/93320001.html
    https://yutaka.it-n.jp/hes/93300010.html
    Female C. cahira, Singapore.
    https://4.bp.blogspot.com/-7l1dr3n_g...ris+bromus.jpg
    Last edited by Psyche; 21-Nov-2023 at 10:30 PM.

  3. #3
    Join Date
    Jun 2006
    Location
    Western Singapore
    Posts
    4,356

    Default

    Have this male Caltoris eclosed this morning. Is this Caltoris bromus? It has one obvious white spot in the hindwing, and may be a second one (much more obscure than the first one).

    Horace

  4. #4
    Join Date
    Nov 2010
    Location
    Malaysia
    Posts
    6,846

    Default

    This is a fine male Caltoris bromus.

    The FW spots are usually large, the subapical more often two.
    The Hw spot here is in space 2.
    Male more often have no HW spot, while the female often have two in space 2 &c 3.

    This now seem to be less rare than before.
    eg.
    Males.
    https://www.inaturalist.org/observations/184641820
    https://www.inaturalist.org/observations/150484243
    https://www.inaturalist.org/observations/38212403
    https://www.inaturalist.org/observations/92336192
    With the upper cellspot small.
    https://www.inaturalist.org/observations/149217007
    Female.
    https://www.inaturalist.org/observations/13664032

    Two ?females with multiple HW spots appear to be C. bromus aberrations.
    https://www.inaturalist.org/observations/96995697
    https://www.inaturalist.org/observations/13297994

    Calttoris cahira have the HW dark chocolate.
    Federick's shot female.
    https://butterflieshk.files.wordpres...ris-cahira.jpg


    Caltoris cormasa have the UnH deeper darker redbrown.Fw subapical spots are often three & small.
    Male & female.
    https://blogger.googleusercontent.co...enjamin_01.jpg
    https://2.bp.blogspot.com/-2caxXSexY...0/DSC_0108.JPG



    TL Seow: Cheers.

  5. #5
    Join Date
    Jun 2006
    Location
    Western Singapore
    Posts
    4,356

    Default

    Many thanks, Dr Seow for the ID confirmation.
    Horace

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Join us