Usually when Marsilea species are grown submersed, their leaves take on a single rounded shape. I only see one of those. If that plant is truly submersed-grown and has been for a while, then it may be M. quadrifolia based on the fact that most of the leaves are still clover-like. That being said, are you supplementing CO2 at all?
It looks too tall to be M. minuta (at least based on my experience), but I'm not familiar w/ the Ebi lighting setup.