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Sewellia albisuera
July 19, 2012
4:06 pm
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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.

July 20, 2012
8:10 am
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Matt
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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?

Cake or death?
July 20, 2012
8:01 pm
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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.

July 24, 2012
8:26 am
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Thanks a lot Manuel, will do that shortly.

Cake or death?
July 28, 2012
8:18 pm
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torso
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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

July 29, 2012
8:54 am
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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.

July 29, 2012
10:01 am
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torso
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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

July 31, 2012
8:27 pm
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torso
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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"

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heers Charles

August 1, 2012
8:12 am
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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.?

August 1, 2012
8:25 am
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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.

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Cake or death?
August 1, 2012
9:28 am
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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

August 3, 2012
8:45 am
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Matt
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So what should I do with Manuel's pics? Laugh 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!

Cake or death?
August 5, 2012
1:15 pm
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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.

August 6, 2012
10:06 am
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Ok, will sort this when I can unless anyone else fancies doing it? *whistles*

Cake or death?
August 8, 2012
8:09 am
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shure I would help but I'm too far away Cry

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/dow.....n_2011.pdf

Cheers Charles

August 8, 2012
3:04 pm
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If you have qustions Matt, let me know.

Wow very interesting paper Charles!
The 'Dakchung' reminds me on S. elongata very elongated body shape but the markings are different.
Another new species from Laos?

August 8, 2012
4:16 pm
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It's not clear.. The new species is not identic with a described species, not S. elongata.

save this

"The descriptions of these Vietnamese species is unfortunately in a quality that makes it hard or impossible to evaluate their validity or for comparison with the fauna of adjacent areas. In most cases identification of these
Vietnamese species will be possible only after they are properly re-described or if material becomes
available for direct comparison." (M.Kotteltat)

In case that it is a species described by nguyen, the distribution would be Laos and Vietnam, means not endemic to Laos.

We have to wait.

Cheers Charles

August 8, 2012
5:13 pm
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Thanks for the extra info!

The large fleshy flap at the base of the pelvic fins is really someting special at this species.

August 9, 2012
8:13 am
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Matt
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Is this flap visible in any of the pics above Manuel?

Charles, the same as you regarding the undescribed one from Laos - have the same paper and that is all.

Edit: moving this thread into the main fw forum as the discussion has gone a little beyond the original photos posted.

Cake or death?
August 9, 2012
2:09 pm
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I mean the big fleshy lap of the Sewellia sp. n. 'Dakchung' in Charles paper.
You can clearly see it at the base of the pelvic fins.

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