After some luck I have both seen a lot of these and even bought some to my own collection, and I was wrong when I said it's L333 and I am completely sure they are L318 Hypancistrus sp instead. What I am not sure about is if the origin in Datz and Aqualog are correct, they are exported as L333 from xingu.
This one shows almost exactly the same pattern and body as the species in question, but have nothing yellow which can depend on the photographer.
And even the big one I posted earlier belongs to this species, before I was sure it was an adult male L333 but know when I have had the chance to compare so many species in the same time I am sure this one also are L318.
So what do you think? Is L318 a colour form of L333 or is't their own species? My species correspond with Datz L318 that shows stress coloration, they are normally much sharper in the colour.
I think there are a mess in some L-nb and maybe to much guessing sometimes but I can be wrong
Janne