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Sewellia spp.

Home Forums Fresh and Brackish Water Fishes Sewellia spp.

Viewing 15 posts - 31 through 45 (of 107 total)
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  • #320949

    Matt
    Keymaster

    Yes the pics are apparently in black-and-white and of poorly-preserved specimens. this faunal survey of the Thu Bon river in which the only Parasewellia recorded was P. monoloba. Not really a help though since all three species were described from that same river.
    Anyone have: Serov D.V., Nezdoliy V.K., Pavlov D.S. 2006. The freshwater fishes of Central Vietnam. M.: KMK Sci. Press Ltd?

    #320963

    Matt
    Keymaster

    Hi Charles has Dr. Freyhof seen this fish? Looks VERY similar to S. breviventralis from his revision as you suggest.

    Attached files

    #320965

    torso
    Participant

    QUOTE (Matt @ Jan 25 2011, 01:52 PM) <{POST_SNAPBACK}>
    Hi Charles has Dr. Freyhof seen this fish? Looks VERY similar to S. breviventralis from his revision as you suggest.

    yes, Matt. I sent him some conservated material (spotted juv inclusive). no answer yet

    #320967

    Matt
    Keymaster

    Ok so better to include it in the KB as a ‘sp.’ for now then?

    #320980

    torso
    Participant

    QUOTE (Matt @ Jan 25 2011, 07:21 PM) <{POST_SNAPBACK}>
    Ok so better to include it in the KB as a ‘sp.’ for now then?

    of course.
    that makes now at least 5 uncertain/undescribed species: 1 sp “spotted”=parasewellia x?; 2 sp=breviventralis then elongata; 3 sp “new elongata”; 4 Kamphols elongata/new species; 5 sp=”breviventralis” above; 6 sp aff.nr. 3.
    hope you can put some order …

    #320990

    Matt
    Keymaster

    Just returning to this fish briefly it actually seems to compare more favourably with S. diardi than S. breviventralis. Any opinions?

    Also, if Roberts’ description was accurate none of the fish pictured here can be S. elongata because he states that the underside of the paired fin rays are covered in melanophores i.e. they appear black. Maybe that’s how Kamphol id’d his fish? A high-res image or two from him could be very useful…

    Attached files

    #321009

    Matt
    Keymaster

    Do all these undescribed ones exhibit the same sexual differences as in S. lineolata i.e. notable differences in head shape plus raised rows of tubercules on the head and pelvic fins of males?

    #321026

    The.Dark.One
    Participant

    Hi

    I have all three volumes of the Nguyen Vietnamese books. Very poor I’m afraid. I also have the Serov et al book.

    #321036

    Matt
    Keymaster

    Bugger. Owt useful in the Serov one?

    Did I mention I hate you?

    Attached files

    #321040

    Menu
    Participant

    Thats a good question Matt.?
    They differ in the markings from all other types.
    Especially this type significantly stands out from the others.

    Looks almost like a S.speciosa but the body shape does not match and the mrkings are a bit different.

    Taken because of sexual differences , basically be like S. lineolata only not quite as easy to recognize. The tubercules are not so easy to identify.

    #321042

    The.Dark.One
    Participant

    QUOTE (Matt @ Jan 28 2011, 09:19 AM) <{POST_SNAPBACK}>
    b*gg*r. Owt useful in the Serov one?

    Did I mention I hate you?

    #321043

    Plaamoo
    Participant

    QUOTE (The.Dark.One @ Jan 28 2011, 09:12 AM) <{POST_SNAPBACK}>
    They also have a look of a Beaufortia to me

    The first thought I had when I saw them in the shop.

    #321056

    torso
    Participant

    it s certainly not: s. diardi because the body-shape is far away frrom the large speciosa-type.; not breviventralis because the head-profile is different.
    head-form is different to all sewellia I know and have seen in pics and drawings.
    but: itßs close to breviventralis
    can you take some more close lateral pics, pectorals and anal region?

    #321068

    Matt
    Keymaster

    I think the reference we need re. differences between Beaufortia and Sewellia might be: Hora, S. L. 1932. Classification, bionomics and evolution of homalopterid fishes. Memoirs of the Indian Museum v. 12 (no. 2): 263-330.

    I don’t have it.

    #321071

    The.Dark.One
    Participant

    QUOTE (Matt @ Jan 29 2011, 12:57 PM) <{POST_SNAPBACK}>
    I think the reference we need re. differences between Beaufortia and Sewellia might be: Hora, S. L. 1932. Classification, bionomics and evolution of homalopterid fishes. Memoirs of the Indian Museum v. 12 (no. 2): 263-330.

    I don’t have it.

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