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.
Can you please let us know what the length is of this fish? Judging from the pics that you posted it appears way to big to be an LDA08... I personally don't think it looks like one... at all.
Is your LFS able to know where the fish in question came from? With the hundreds of ancistrus sp. it is sometimes difficult if not impossible to pinpoint without a collection point. It does remind me with the patterning you spoke of ancistrus sp.1 as well... one would think that the LFS would know if it was buying something such as an LDA08 and wouldn't sell it as a common... besides the fact you don't normally see LDA08 in the stores. Good luck, I hope someone is able to be of more help.
Shape of the mouth is also quite different, where the common is pretty much round, and the A. claro being oval, wider than it's "long", if that makes sense to you. There's a picture of that feature in the Cat-eLog. AFAIK this is fairly unique.