Can you help me ID this hoplo?

[bekateen]

Hi all,

These hoplos were wild-caught in the Rio Nanay near Iquitos by a friend of mine. They were mixed together with a group of other hoplos, including

Dianema longibarbis

and a few very small

Megalechis

.

The largest is about 5-6cm SL. The smallest about 2.5cm SL. I believe these are

Callichthys callichthys

or

Lepthoplosternum

, but I can't decide which. And if Lepthoplosternum, I'm unsure of the species ID.

According to Specieslink.net, Callichthys callichthys is everywhere (practically), so that's a definite option. Both

Lepthoplosternum altamazonicum

and

Lepthoplosternum beni

are found in the same area. If they are Lepthoplosternum, I was thinking they are L. altamazonicum, but the caudal peduncle seems to be too narrow (vertically) to be either of these species.
Can you help?

Thanks in advance, Eric

[bekateen]

Follow up... the more I look at the pics, the more I think these are juvenile

Callichthys callichthys

. Please prove me wrong.

Cheers, Eric

[Jools]

I think you are not wrong...

Jools

[bekateen]

I think you are not wrong...

Jools

Dang. I wanted to be wrong. I didn't want another 16cm species.

Thanks Jools.

Cheers Eric