Did you mean: Eurypterid
Eurypatagidae
Animal
Eurypatagidae is a family of echinoderms belonging to the order Spatangoida.
Genera:
Elipneustes Koehler, 1914
Eurypatagus Mortensen, 1948
Linopneustes A.Agassiz, 1881
Paramaretia Mortensen, 1950
Platybrissus Grube, 1866 Wikipedia
Scientific name: Eurypatagidae