Zygomycotina
Sub-division: Zygomycotina:- It includes 2 classes - a. Zygomycetes:- > The class zygomycetes derives its name from the thick-walled resting spores, the zygospores formed as a result of the complete fusion of the protoplasts of two equal or unequal gametangia. > It comprises 450 species which are grouped under 70 genera. > They all are terrestrial molds which show a wide range in their habit. > Most of them are saprobes. Among these some are soil saprophytes and others coprophilous (growing on dung). > The parasitic species include pin molds which attack fungi, insects or protozoa. Some are facultative weak parasites (Rhizopus sexualis) of higher plants. A few are specialized parasites of animals. A very few occur as obligate parasites of other Zygomycetes. > The members are saprobes or weak parasites on plants to specialized parasites on animals. A few occur on dung thus coprophilous in nature. > The thallus usually consists of well ...