| Noun | 1. | class Chytridiomycetes - a class of mostly aquatic fungi; saprophytic or parasitic on algae or fungi or plantsclass - (biology) a taxonomic group containing one or more orders Chytridiales, order Chytridiales - simple aquatic fungi mostly saprophytic but some parasitic on higher plants or animals or fresh water fungi; sometimes placed in class Oomycetes Blastocladiales, order Blastocladiales - fungi that carry out asexual reproduction by thick-walled resting spores that produce zoospores upon germination; sometimes placed in class Oomycetes | |