Type species: Euphrosynoplax clausa Guinot, 1969, fixed by original designation and monotypy. Gender feminine.
Type locality: Florida, Dry Tortugas, 91 m.
Included species: Euphrosynoplax campechiensis Vázquez-Bader & Gracia, 1991, Euphrosynoplax clausa Guinot, 1969, and Euphrosynoplax dincao sp. nov.