ABSTRACTChytriomyces angularisgrows on pollen and heat-treatedOedogoniumbaits. Zoosporangia are gibbose, operculate, and lack vesicular discharge. The main rhizoid is thread-like. The zoospore has a core of ribosomes delimited by endoplasmic reticulum, a nonfunctional centriole that is parallel to the kinetosome and connected to it by fibrils, and a microbody appressed to a single lipid globule. It lacks a rumposome, microtubule root, striated inclusion, and plates associated with the kinetosome, features that occur in the type species. Thus, the description ofChytriomycesencompasses species that are not closely related.