Haplomastigomycotina
Sub-division: Haplomastigomycotina:- Flagellated cells bear only one type of flagella either whiplash type or tinsel type. It includes 3 classes - 1. Chytridiomycetes (Aquatic):- > Most of the members are unicellular, but some advanced taxa form short chains of cells which are attached to the substratum with the help of rhizoids. Some forms possess undeveloped mycelium. > Chitin and glycan are the main constituents of the cell walk > In unicellular forms the thallus is holocarpic (whole vegetative thallus transforms into one or more reproductive structures), whereas in filamentous forms it is eucarpic (some part of the vegetative thallus transforms into reproductive structure, while the rest remains vegetative). > The members of the class may be epibiotic (reproductive bodies present on the host’s surface) or endobiotic (live completely within the cells of the host) and monocentric (having only a single reproductive structure) or polycentric (having m...