Jaguar catfish sexual dimorphism

[syno321]

Our local lfs has brought in some healthy looking Liosomadoras oncinus and I'm seriously considering trying to find some space in my room for them. I've had excellent luck breeding T. perugiae and T. galaxias in the past couple of years and would like to take up the challenge of a catfish I've admired for a long time. In the photo section of the species cat-elog for the Jaguars, pictures 7 and 11 show close-ups of the vents of what I assume are the 2 sexes. It doen't appear to be labeled as to which picture is which sex, and I'd guess that picture 7 is the male, but is there anyone out there who can tell me definitively which picture is which sex? Thanks

[Marc van Arc]

Hi,
There's no need to turn them upside down. Like all Auchenipterids, males develop a genital papilla which is used for internal fertilization. It is located at the beginning of the anal fin.
At the same time I realise you already know this, having bred Tatias. I must admit that either the specimen in the Cat-elog are too young to show gender or that they are all females. Which brings me back to your initial question.....
I'll try to look it up for you.

PS: the fish in picture 7 shows something that looks like a thickened first anal ray/papilla (which is completely absent in picture 11), so I think that's a male.

[grokefish]

Hooray Jaguar cats for everyone!
And about bloody time too.
None for years and they seem to be turning up everywhere.
They must know that the grokefish is dead and it is safe for them to come out of hiding to subtly infiltrate the human race in the guise of subjugated inhabitants of the humans when really they are studying our habits in order to figure out the best way to get rid of us.
Mark my words they are watching and they are up to something!
Oh! if only the grokefish was still here to relay the messages of the neon masters, we could be sure then of the way forward...

I'm still gonna try and breed them though.