Cerion mumia obliterata C.J. Maynard, 1896
Cerion mumiola (L. Pfeiffer, 1839)
Strophiops muralia C.J. Maynard & W.F. Clapp,1921
Strophiops mutata C.J. Maynard, 1894
Strophiops mutatoria C.J. Maynard & W.F. Clapp,1920
Strophiops nana (C.J. Maynard, 1889)
Cerion natensoni A. Gonzalez Guillén, 2008
Strophiops navalis C.J. Maynard & W.F. Clapp,1920
Strophiops nebula C.J. Maynard & W.F. Clapp,1920
Strophiops neglecta C.J. Maynard, 1894
Strophiops neglecta agava C.J. Maynard, 1913
Cerion nipense C.G. Aguayo, 1953
Strophiops nitela (C.J. Maynard, 1889)
Cerion niteloides W.H. Dall, 1896
Strophiops nivia C.J. Maynard, 1913
Cerion normale H.A. Pilsbry & H. Black,1930
Cerion normalis H.H. Beck, 1837
Strophiops novita C.J. Maynard & W.F. Clapp,1921
Strophiops nuda (C.J. Maynard, 1889)
Strophiops oberholseri C.J. Maynard, 1913
Strophiops obscura C.J. Maynard, 1896
Mexistrophia obsoleta F.G. Thompson, 2011
Strophiops obtusa C.J. Maynard & W.F. Clapp,1921
Strophiops orbicularia (C.J. Maynard, 1889)
Cerion orientale W.J. Clench & C.G. Aguayo,1951
Cerion ornatula C.J. Maynard, 1913
Cerion ornatulaclappi (C.J. Maynard, 1913)
Strophiops ornatularufina C.J. Maynard, 1913
Strophiops oscula C.J. Maynard & W.F. Clapp,1921
Cerion oweni W.H. Dall, 1905
Cerion oweni incisum W.H. Dall, 1905
Strophiops palida (C.J. Maynard, 1889)
Strophiops palidula C.J. Maynard & W.F. Clapp,1921
Strophiops palmata C.J. Maynard & W.F. Clapp,1919
Strophiops palmata minuta C.J. Maynard & W.F. Clapp,1920