It appears to be LDA33. It definitely isn't an L155 for a few reasons. 1 it has spots. Two it looks like a baryancistrus. Three, it isn't an Acanthicus, as it has an adipose fin.
Yes, I'd agree with the L142/LDA33, There are many black, white spotted plecos, it isn't an Acanthicus, Leporacanthicus, Hypancistrus etc, which are easy enough to tell apart from this body structure.