Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Chlorococcobiotina Doweld (2001)
         Phylum Micrinomonadophyta Doweld (2001) [monotypic]
           Subphylum Micrinomonadophytina Doweld (2001) [monotypic]
             Class Micrinomonadophyceae Doweld (2001) [monotypic]
               Order Micrinomonadales Doweld (2001) [monotypic]
                 Family Micrinomonadaceae Doweld (2001) [monotypic] see Family Mamiellaceae Moestrup (1984)
                   Genus Micrinomonas Doweld (2001)
                     Micrinomonas pusilla (R.W. Butcher) Doweld (2001)