Chytridiomycota is a division of the Fungi kingdom and contains only one class, Chytridiomycetes. The name refers to the chytridium (from the Greek, chytridion, meaning "little pot"): the structure containing unreleased spores. In older classifications, chytrid orders (except the recently established Neocallimasticales and Spizellomycetales) were placed in the Class Phycomycetes under the Subdivision Myxomycophyta of the Kingdom Fungi.