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.
That's a nice collection - unfortunately, I would like to see a more detailed photo of the fish you're asking about - a closer up lateral with the dorsal fin raised and a shot of the mouth just to confirm it's Hypancistrus - there's several others that have pretty similar. Without a better pic, it's hard to say what it is - certainly can't rule out L340, but there are several others that it could also be.
You have probably got the wrong number for your Peckoltia, I think you have L201 (or L15, they are difficult to tell apart). L204 is definitely NOT your fish, as that's a Flash Panaque, a dark based fish with thin yellow/white lines...
Andre,
This labeled L 204 is actually L 52 or Dekeyseria brachyura. I can not tell which from the photo.
-Shane
"My journey is at an end and the tale is told. The reader who has followed so faithfully and so far, they have the right to ask, what do I bring back? It can be summed up in three words. Concentrate upon Uganda."
Winston Churchill, My African Journey
IMO the striping is wrong for L134 also, but it's definitely not L340. Sorry I'm not more help! They still look like pretty healthy fish for your average LFS. Most people would kill to find a selection like that in their local stores ;).
I'm not 100% sure it's not L340 (I've seen a LOT of these recently) - it is certainly a Hypancistrus and not a Peckoltia going on the headshape. Not an L134 for sure.