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Sewellia albisuera

Home Forums Fresh and Brackish Water Fishes Sewellia albisuera

This topic contains 0 replies, has 1 voice, and was last updated by  olly 1 year, 11 months ago.

Viewing 15 posts - 1 through 15 (of 42 total)
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  • #302308

    Menu
    Participant

    IMG_3393d-1.jpgIMG_3358d-1.jpgIMG_3359d-1.jpgIMG_3362d-1.jpgIMG_3364d-1.jpgIMG_3367d-1.jpgIMG_3384d-1.jpgIMG_3395d-4.jpgIMG_3380d.jpgIMG_3375d.jpgIMG_3379d.jpg

    Even this species is now importet to us.
    They come in a mixed shipment with S. sp. spotted SEW01
    Some of them look like a crossing between albisuera and spotted.
    They could really be a kind of Parasewellia.?

    The last pics show the real S. spotted for comparison.

    #348536

    Matt
    Keymaster

    Great pics Manuel, you can see the differences really clearly – all your fish look in top condition as well. 🙂

    Ok to add some of these to the relevant species pages?

    #348542

    Menu
    Participant

    Many thanks, I think I’m doing everything right with them, they get only the best food thats the reason why they look so good. 😉
    Only the new S. albisuera is a little bit to thin, but in a few weeks he will also have a good condition.

    Yes of course Matt you can add some to the species pages.

    #348561

    Matt
    Keymaster

    Thanks a lot Manuel, will do that shortly.

    #348589

    torso
    Participant

    certainly not S. albisurea, sorry Manuel.

    the species doesn`t have a spotted but a reticulated body and looks different in body-shape.

    S. sp spotted or one of the unknown species described by Nguyen.

    Cheers Charles

    #348590

    Menu
    Participant

    No spotted Charles.
    The head and body shape is different, much more extended and also the behavior, always in front of the tank not so shy like the spotted.

    My fish looks like a male.
    Have you got pictures of a albisuera male?
    I know only the pics of a female from Beverley Newcomer and the one from
    J. Freyhof that looks exactly like my fish.
    The one pic in the Amazonas magazine show a male I think, but the description do not match to the pictures of Beverleys fish.
    It is written: the ventral fins do not reach the anal fin.
    This fact, however, applies not.??
    Another fact that it can’t be spotted, you can see the first golden mirkings
    just behind the head.

    #348591

    torso
    Participant

    Hi Manuel

    we had this form in some shipments the last years. Pattern may differ, but are close to S. sp SEW 01. So I said or S. sp spotted – means “new” sp spotted xxx – not S.sp SEW 01 or/and one of Nguyen`s species.

    But not albisurea: head/mouthform is of the S. sp spotted SEW 01-Type, not like albisurea.

    give me time to excavate some pics.

    cheers Charles

    #348612

    torso
    Participant

    Hi all

    I tried to elaborate my statement  and had to work on some very “small” files=pixels.

    Forget the lines inside the pics. Tried to figure out messurements, but it’s impossible with so different pics.

    pic 1 shows some Sewellia SEW 01 in a quarantaine-tank.

    pic 2 another group with one specimen “reticulated” pattern

    pic 3 head of a “normal” specimen

    pic 4 head of the “reticulated” specimen

    pic 5 head of Manuel’s specimen

    pic 6 a male underside

    pic 7 adapted pic with removed tubercles to show the head-form

    pic 8 the sam with Manuel’s specimen

    pic 9 S. albisurea by Newcomer

    pic 10 drawing after S. albisurea in the description by J. Freyhof. The shape may be accuentated in the forward flat part by conservation. But it is clearly different to pic 1-8

    pic 11 a “normal” specimen flying. Just to get a complete picture of these beauties after that “massacre”

    Cspotted-IMG_7362.jpgspotted-IMG_7369.jpgspotted-IMG_7352.jpgspottedIMG_7364.jpgalbisurea-manuel-IMG_3364d-1.jpgspotted-DSC_7280.jpgspotted-charles-DSC_7280-2.jpgalbisurea-manuel-IMG_3395d-4.jpgalbisurea-newcomer.JPGs.-albisurea-bearb-DSC_2339.JPGspotted-IMG_7486.jpgheers Charles

    #348619

    Menu
    Participant

    Hi Charles,

    very nice work, but it still is not easy to say.
    I would say the head shape of Newcomer’s fish is also to much pointed as in the description of albisuera??
    How can we now as the head shape of a albisuera male look like?
    Probably also not so sharp.?

    What decision can we conclude?

    SEW01 ruled out.
    S. albisuera have a rounder head shape.?
    It is a new species probably one of Nguyen`s species.?

    #348622

    Matt
    Keymaster

    No time to go through everything now but just for sake of completeness here’s the pic of a live specimen of S. albisuera from Freyhof’s paper.

    Sewellia-albisuera-Freyhof.JPG

    #348623

    torso
    Participant

    Hi Manuel

    to clarify: when I saw Newcomer´s pics I asked the permission to check the species – J. Freyhof “high probable, but astonishing to see any specimen in trade because the river is highly polluted” – and show them. Regarding the pattern of all reliable pics I know, your specimen is not S. albisurea.  Could send you some mpics. Or the description if you don`t have already. 

    So the question is: what species is your specimen? Sewellia SEW 01, a new spotted Sewellia sp. or one of Nguyen´s species we don´t know nothing about. Of course there is the possibility that Nguyen has already described all of them.

    S. albisurea: the head-form is more rounded in the overhead view, the shape of my “drawing” doesn´t include the outer line of the head b ecause it´s taken from the underside view of the description to point out the less pointed shape regarding S. SEW 01.

    Thanks Matt for the pic. It should clarify the difference.

    Cheers Charles

    #348632

    Matt
    Keymaster

    So what should I do with Manuel’s pics? 😀 A new SEW number?

    Re-read the paper and agree it’s inconclusive in terms of identifying these intermediate-looking forms – they might even all be one species. Hope the next genus review includes some molecular comparisons!

    #348640

    Menu
    Participant

    Yes Matt, I think we need a new SEW number.
    I also go through the paper, some information is missing…
    With the information we have its hard to say.
    But I think Charles is right, it could be a new species.

    #348651

    Matt
    Keymaster

    Ok, will sort this when I can unless anyone else fancies doing it? *whistles*

    #348669

    torso
    Participant

    shure I would help but I’m too far away 😥

    But you get my assistance from far away when needed.

    Another question when it comes to Sewellia spp: does anybody know something about this one from Laos?

    Sewellia sp. n. ‘Dakchung’

    http://awsassets.panda.org/downloads/fishes_of_xe_kaman_2011.pdf

    Cheers Charles

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