Did you know fantastic help is an anagram of Planet Catfish? This forum is for those of you with pictures of your catfish who are looking for help identifying them. There are many here to help and a firm ID is the first step towards keeping your catfish in the best conditions.
Not a great photo, but certainly not P. maccus. P. maccus is not found much south of the Rio Apure where it is replaced by LDA 68. Peru would be way out of its range.
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It is rather though to say. Have you a better pic. especially showing the head region.
Have you ask the seller under what name he bouight it and from where. You may then ask the wholesaler to have more information.
While speaking once with Jon Armbruster, he told me that basically every mid- big size rivers have certainly its owns species of a dwarf Panaque species ( Panaqolus) . Many are very look a like.