oh the dreaded hypan ID , where are Janne and Cup, and many others on here who are so superb at this?
I am taking a shot at L270. Hypancistrus sp(l270)
Just possibly going by head shape and markings on head with this pic from the 270 catalog here and comparing it to yours you posted, your close up head shot,
But then again I am not sure and I have a L270 so now they all look like L270s s to me! lol