Classification of the genus Megamyonia

G. †Megamyonia Wang 1949
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†Megamyonia arethusa Billings 1862
†Megamyonia breviuscula Foerste 1917
†Megamyonia gracilis Twenhofel 1928
†Megamyonia knighti Wang 1949
†Megamyonia mankini Alberstadt 1973
†Megamyonia nitens Billings 1860
†Megamyonia unicostata Meek and Worthen 1868
†Megamyonia vaurealensis Twenhofel 1928