Elmo great link here is a photo of the mouth , thinking l226 now.Hi,
L397 is a Panaqolus.
Please make a good picture of the teath or compare https://www.suedamerikafans.de/en/?page_id=784&familie=1&unterfamilie=100
The teeth/jaws of Panaqolus and Hypancistrus are very different.
The differentiation based on the teeth is very easy. You should be able to do that too.
Then take very good pictures of the side, including the caudal fin.
If it's a Panaqolus, also get a very good picture of the head from above.