Kuiter lists Platyglossua xanti as a synonym for melasmapomas.I don't understand how xanti ever got tied to melasmapomus.
Fishbase:
Halichoeres xanti (Károli, 1882): Ambiguous synonym for Halichoeres bicolor ((Károli, 1882))
Unless it's simply anyone guess what fish was in a 1882 sketch, I'm not understanding it.