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Daniel,
Lee Finley would be the one to ask. He "specialized" in them for many years. Somewhere I have a nice two part article he did on Ageneiosus several years ago. I'll see if I can't dig it up.
-Shane

Did you manage to find it, Shane? For I would be interested in it as well.

there was an article published in Aquarium Fish Magazine in the late 90's (I think) that focused on a breeding group of Ageneiosus magoi. Shane, is this the article you are thinking of?

Update:
After a sudden outbreak of white spot disease I'm reluctant to report I've lost one Centromochlus concolor.
That leaves me with just one male who is now healthy again. Phew...
C. perugiae were heavily affected as well. Afaics I only have 2 left.
Spinipterus acsi and Tatia dunni are much stronger and were hardly affected.

After a phonecall with Marc I treated the tank with no medicine but used non-iodised salt ( 1 1/2 grams per liter) and a raising of the watertemp. to about 30 Celsius.

Thanks for the advice, Marc!

I too am battling a health issue. After several months together without issue my two had a real go at each other that resulted in the smaller of the two getting really damaged.

About a week ago I noticed some reddening on the caudal of the smaller fish (about 6" SL). He lives in a loricariidae spawning tube (i.e. Pleco Burrito) and only his caudal is regularly visible. I figured the wound was from the larger jaguar (about 7.5" SL) trying to get into the same burrito. I moved around the various hiding places in the tank in hopes of breaking up the aggression.

Yesterday my wife told me to get down and have a look at him asap. His lower caudal lobe had been stripped to the hard rays. I prepped a hospital tank with a half dose of meth blue and prepped a cotton swab with meth blue to treat the fin directly before moving the fish into the hospital tank. On removing his burrito from the tank it was clear that the damage was far more extensive. In addition to the heavily damaged caudal lobe, there was a large deep wound on the caudal peduncle. The worst was the area around the anal fin which had a long and very deep gash. Luckily the wounds were fresh and so not infected.

I treated all these areas directly with a swab of meth blue and moved the fish to the hospital tank. The other larger fish is fine other than some reddness around the pectorals, which I assume came from slicing the heck out of his/her tankmate with them.

As these fish have been fine together in the tank (40 gallons, 151 liters) for several months, I wonder if the wounds were not the result of a love tyrst gone bad. The attack took place less than 24 hours after a 50% water change and the vast majority of damage is around the anal fin where the sex organs are located. As of last night the wounded fish was still alive.

Any thoughts? The jaguars are the tank's only inhabitants.

-Shane

Sorry for the late reply, but yes, you've probably hit the nail on the head with your conclusion. I've seen this behaviour in T. intermedia as well. Mating attempts that ended in severe damages.
Moreover, Lios can be rather nasty to any species that lives in "their" cave. I've witnessed several woodcats getting damaged because they ended up in the wrong place (after a tank overhaul for instance) and the Lios just squeezed themselves into their hideout, no matter what. The grunting then suggested there was something going on, but the poor victim(-s) could only escape after the Lios had decided to leave their cravice during the night.
The only time when my Lios were damaged themselves was when I had the worst idea of the decade and added an adult Trachycorystes to my tank, which insisted on hiding in the Lio cave. And although they were damaged, the Lios didn't budge.
Luckily, auchenipterids heal quickly ime. I hope yours will too.

Shane wrote:The other larger fish is fine other than some reddness around the pectorals, which I assume came from slicing the heck out of his/her tankmate with them

I wouldn't be surprised if the damaged fish is also a male.
I had a male jag mortally wounded by what I used to call my rogue male.
No doubt the water change triggered the aggression.

Thanks guys. The fish is still alive. The wounds are pretty ugly but have yet to become infected. Tonight I will retreat the wounds directly again with a swab containing meth blue and treat the tank with Pimafix. I stopped by a pet store and picked up some tetracycline to have on hand in case things start looking really bad.
-Shane

Last Saturday the large tank got overhauled. I said goodbye to the Markianas, which went to Belgium to live at Arthos' place. He was very pleased with them.
I also said goodbye to my remaining siamensis algae eaters, as the Ancistrus are doing a very good job.

While catching the Markiana, one Ageneiosus cf atronasus got incidentally entangled in a net and eventually a pair of scissors were needed to get it out.
Having more room in the tank now, the decision was made to transfer the 2 smaller specimens from the small tank to the large tank. Of course we were keen to use a different kind of net, but also on this occasion both specimens got themselves entangled and the scissors had to be used again.

Afaics, the larger specimen is doing fine. We were quite worried, because this one had suffered most. I've yet to spot the 2 smaller ones. Major problem is that the Triportheus go bezirk when I dare to use a flashlight. Hopefully they will become less seclusive then when they were in the small tank, so I'll be able to spot them without having to startle the Triportheus.

Lesson for everyone keeping Ageneiosus cf atronasus: be careful when you (have to) catch them. Use a large net and then scoop them out with a cup, mini-bucket or some such. That reduces stress and not only wrt the fish.....

Just now I had to put some floating plants back (it always takes a while before everything is "fixed" again after an overhaul) and I saw the smallest A. cf atronasus sitting in one, so that's good.
As Jools said previously, they love to sit in Java fern. Apparently even if that means they're in some sort of merry-go-round plant which cruises the surface. I almost hated myself for putting the plant back behind a piece of wood....

Hi Marc, maybe a stupid question, what are Markianas ?

Markiana nigripinnis

Marc kept a group of these with the Auchenipterids.
it's a species from Paraguay, highly active, very easy to keep and peaceful but also a voracious feeder that eats a lot
;)

Trachelyopterus galeatus


Trachelyopterus fisheri

They're looking good Bijn.

Marc van Arc wrote:Afaics, the larger atronasus specimen is doing fine. We were quite worried, because this one had suffered most.

I was able to see it in the light yesterday and it has suffered indeed. All spines (dorsal, pectorals) are white and one of them has a bit of red. I can only assume this has been worse and is now recovering.

In two days from now will arrive a group of Tatia intermedia in my tank. .

Shane wrote:The fish is still alive.

How is the Lio doing, Shane?

Phyllonemus wrote:In two days from now a group of Tatia intermedia will arrive in my tank.

And counting -)
Looking forward to some pictures once they have settled - or perhaps before they have settled?

Wrt my own tank:

Good news: I saw the two smallest specimens of A. cf atronasus yesterday evening. The larger specimen that got entangled is improving rapidly. All 4 have been spotted by now.

Bad news: my inferiour A. sp 3 male is less able to swim for some unknown reason. Most likely because of that he is hiding in plants (which is normal) and in pieces of wood (which I have never seen before).
I don't see anything that would imply a disease; my current best guess is age as this species is constantly on the move (day and night) and I therefore expect it to have a shorter lifespan than less active woodcats.

Marc van Arc wrote: Looking forward to some pictures once they have settled - or perhaps before they have settled?

You and other Auchenipterids fans can count on that .

Juvenile Tatia intermedia 3cm big, just a few hours in the tank:

Well, well
How many have you got?

Hi Marc,
I've bought 4 today together with 5 Brochis splendens.
In a week the group of Tatia will be expanded to 7 .

I started with a smaller group because of the just "started up" Tank.

How is the Lio doing, Shane?

Just got back in the US last night and have not had a chance to check him out other than to confirm he is still alive. Wife watched him closely while I was gone and said he ate once. I would say the odds of him surviving are pretty good at this point. I will admit that I am completely amazed that this fish is still alive given the extent of the damage it suffered.
-Shane

for the people who know their trade names:

Centromochlus spec. BARURI WF
what is this?

Baruri is an area (relatively) close to Barcelos (Brazil).
I couldn't find anything more I'm afraid.

My reading of the map says it's possibly a Rio Negro or Rio Branco species. We have nothing from either of those rivers in the Cat-eLog as far as I can see. [But working through, I found the - it's from Upper Negro - no picture tho'. Since it's an IEF paper, I haven't got access to it.

--
Mats

Today 3 Ageneiosus atronasus went to Eindhoven:
Great fish, but not a succes here, for for one way or the other it certainly looks like I've lost 3...
I rescued the remaining ones by selling them to Marc (van Arc).

On a sidenote:
I've found Tetranematichthys on a German stocklist.

which German stocklist?