Can you help me identify this Masdevallia?
(Right after taking this photo, I found a slug eating the flower

)
Possibilities:
Masdevallia Bella Donna (not round enough, no up and down pink stripes)
I am thinking that M. coccinea (for the pink) and (for the roundness) M. constricta or M. infracta are in the family tree.
M. Snow Leopard looks very similar in color, flower shape, and leaves. It's the second picture.