cryptomonads see Order Cryptomonadales Pascher (1913)
   reniform cryptomonads see Family Hemiselmidaceae Butcher (1967)
     Genus Hemiselmis M. Parke (1949)
       1 Subgenus Hemiselmis subg. Hemiselmis (M. Parke, 1949) Butcher (1967)
       2 Subgenus Hemiselmis subg. Plagiomonas Butcher (1967)
       3 Hemiselmis amylosa B.L. Clay & P. Kugrens, 1999a
       4 Hemiselmis brunnescens R.W. Butcher (1967)
       5 Hemiselmis rufescens M. Parke (1949)
       6 Hemiselmis virescens M.R. Droop (1955)