Members are found in soil, fresh water, and saline estuaries.

[3] It has recently been redefined to exclude the taxa Neocallimastigomycota and Monoblepharidomycetes, which are now a phylum and a sister-class respectively.

[4] Chytridiomycetes is the major class of the phylum Chytridiomycota,[5] which contains a number of parasitic species.

[6] Based on the work of "The Mycota: A Comprehensive Treatise on Fungi as Experimental Systems for Basic and Applied Research",[7] Powell and Letcher 2015[8] and Karpov et al.

[9] Synchytriaceae Schröter 1892 Gromochytriaceae Karpov & Aleoshin 2014 Mesochytriaceae Karpov & Aleoshin 2014 Alogomycetaceae Doweld 2014 Lobulomycetaceae Simmons 2009 Arkayaceae Doweld 2014 Polytrichiaceae Longcore & Simmons 2012 Catenochytridiaceae Doweld 2014 Nowakowskiellaceae Sparrow ex Mozley-Standridge 2009 Septochytriaceae Mozley-Standridge 2009 Cladochytriaceae Schröter 1892 Endochytriaceae Sparrow ex Barr 1980 Chytriomycetaceae Letcher 2011 Chytridiaceae Nowakowski 1878 Blyttiomyces Bartsch 1939 Caulochytriaceae Subram.