As I have both L-007, L-007a(goldspot lepracanthicus galaxis) and L-201 , I must say that particularly from the last picture it looks just like a hypancistrus inspector and would not have guessed on the lepracanthicus galaxis but since you guys pointed out the mouth in the second shot and the way the fish positions itself I am starting to think it may be. The juveniles of some species can really throw you for a loop though.
There is no way I would imagine this fish look like an adult L galaxis:
L-007

L-007a
Lastly - is there an occurance of lepracanthicus galaxis near the Rio Magdalena ?
And one more: Any chance it may be a juvenile Baryancistrus niveus?
Thanks