Fungi form a unique group of heterotrophic organisms showing wide diversity. Based various features like spore formation mode, fruiting bodies fungi is categorized into -
Phycomycetes - Mainly aquatic habitat, also seen growing on decaying wood. Their mycelium is aseptate and coenocytic. Zoospores or aplanosopres are formed during asexual reproduction. Mucor, Rhizopus, Albugo are included in this group.
Ascomycetes - Majorly multicellular and also called sac-fungi as their reproductive spores are produced in sac like structure called ascus. For asexual reproduction, conidia are produced in specialized structure called conidiophore. This group includes Penicillium, Aspergillus, Claviceps.
Basidiomycetes - Filamentous fungi having hyphae and specialized club-shaped cells called basidia involved in sexual reproduction. Agaricus (Mushroom), Puccinia, Ustilago fall in this group.
Deuteromycetes - Reproduce only via asexual mode through spores called conidia. The mycelium of this group is septate and branched. Trichoderma, Colletotrichum are included in this group.