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Can someone correctly ID this for me please, I'm not sure if it is T brevis or not thanks



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FWIW, there is no such name as Tridensimilis nemurus.

There are only two species known, of which one (T. venezuelae) is very unlikely to be encountered in the trade.

Never seen these exported. They die when captured in the wild if exposed to atmospheric O2.
-Shane

As I'm unable to see the difference(-s) between T. brevis and T. venezuelae, I prefer to think this is T. brevis.
Kept these on two separate occasions as individual and both times found them as bycatch in a shipment of Corydoras pygmaeus.
Both brevis did well for some time and then suddenly simply disappeared without any trace. Mind you, they do nip/bite larger fishes, but smaller ones seem safe.

Silurus wrote:FWIW, there is no such name as Tridensimilis nemurus.

There are only two species known, of which one (T. venezuelae) is very unlikely to be encountered in the trade.

T nemurus was the name given by the LFS guy who pulled it from the Burgees Atlas of freshwater and marine catfish

Marc van Arc wrote:As I'm unable to see the difference(-s) between T. brevis and T. venezuelae, I prefer to think this is T. brevis.
Kept these on two separate occasions as individual and both times found them as bycatch in a shipment of Corydoras pygmaeus.
Both brevis did well for some time and then suddenly simply disappeared without any trace. Mind you, they do nip/bite larger fishes, but smaller ones seem safe.

I separated it from the main tank as it seemed to be trying to bite the CPS's and pygmy cories, as you say this one too came in with a shipment of Corydoras pygmaeus. I've tried to feed it micro worms, earthworms, flake, but it doesn't seem to be taking anything

pose1don wrote:T nemurus was the name given by the LFS guy who pulled it from the Burgees Atlas of freshwater and marine catfish

It is indeed listed as such in the atlas photo section but that's a mistake. If you looked at the checklist on p325, it's not mentioned. This is almost certainly the Amazon (as opposed to Maracaibo) species, .

Jools

Jools wrote:

pose1don wrote:T nemurus was the name given by the LFS guy who pulled it from the Burgees Atlas of freshwater and marine catfish

It is indeed listed as such in the atlas photo section but that's a mistake. If you looked at the checklist on p325, it's not mentioned. This is almost certainly the Amazon (as opposed to Maracaibo) species,

Tridensimilis brevis

.

Jools

I guess thats why I cant find any info on nemurus then , the corys where wild caught from peru. The thing that was confusing me was that some pictures show the dark marking near the base of the tail and some don't, I didn't know if this was down to different species or just the pictures not showing it. So brevis it is then, I just need to find out how to get it feed before it starves to death now.

I kept these things alive with live bloodworm.

I'll return it to the shop then as I cant get a constant supply of bloodworms, and as it hitched its way in and I didnt buy it I dont want to go to the trouble of trying to culture my own blood worm.

Interesting little fish though and was nice to have it for a while

I'll pass on the info to the shop ;)

BBS is eagerly accepted also. Nano tank with just these would be quite appealing IMO, but they come in so infrequently it could be years to get a group together.