I have never kept macracanthus, and the last time I saw them live in the flesh was almost 20 years ago, so my opinion would hold no credence. Unless I have seriously kept a cichlid, and know for sure I actually had true knowledge it was truly the species, I don't guess.
I have kept minckleyi and bartoni, and it doesn't look like either to me.
I didn't have a camera back when I had minckleyi, but..
Here is bartoni to compare

above a male, below a female

I have kept minckleyi and bartoni, and it doesn't look like either to me.
I didn't have a camera back when I had minckleyi, but..
Here is bartoni to compare

above a male, below a female
