The species formerly known as Apistogramma sp. "Masken" has been scientifically described, as
Apistogramma paulmuelleri sp. n .
Apistogramma paulmuelleri sp. n .

I think the answer to that is yes.but I can refer to the fish as A. paulmuelleri.
... I also see A. allpahuayo offered as A. sp. Black Chin quite often.