Thanks for the fast answer

I bought 2 of these today and the owner wasn't sure which species it is.
I think it'a a panaque, but not sure which one?
I hope my images are good enough to identify it.

I'm not sure about age...they are 11-13cm

Are both L147 on the picture males?

Ancistrus sp. `Rio Ucayali` is probably correct

Which Ancistrus species is this?