Although Palm and Burk (1933, Arch. Protistenk. 79: 263) questioned the validity of several of the genera, Braselton (1995, Critical Reviews in Microbiology 21: 263) considered these 10 genera as valid. Approximately 35 species have been described (Karling, 1968, The Plasmodiophorales, 2nd ed., Hafner Publishing, NY). Note that this list does not include any new genera or species reported after 1 July 2000.
I have added "Personal Comments" for several of the genera to give visitors some idea of how specimens were collected from different interesting locations and information about the people I've met along the way. 24 April 2007