Kingdom Fungi is divided into various classes based on
(a) Morphology of Mycelium
(b) Mode of Nutrition
(c) Phylogeny
(d) Mode of spore formation
(e) Fruiting bodies
The morphology of the mycelium, mode of spore formation and fruiting bodies form the basis for the division of the kingdom into various classes like phycomycetes, ascomycetes, basidiomycetes and deuteromycetes.