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.
On first look, I couldn't place the fish and it took me several hours to remember where I had seen them. I'm not sure that it is the same species, but I have seen them imported with Parancistrus auranticans. That may at least give you a locality to start looking.
Larry Vires
Impossible only means that somebody hasn't done it correctly yet.
i have to agree with Christian, looks like a very stressed Baryancistrus (L18 imo) to me too.
I remember an article about color modifications in Loricariids by Ingo Seidel in DATZ some years ago, and among other things he pictured a miscolored L18 that looked like your fish.
I have a variation of L076-more yellow than the orange, and it looks exactly like that when it is stressed out. In my opinion, it is not L018, because the L018's I have turn dark when put into stressful situations. Just my opinions though.