(ascomycotes, ascomycetes) Campbell p.616-17
Some of the common species are yeasts, blue-green molds, morels, truffles, and lichens. Ascomycotes are distinguished from other fungi by possession of the ascus, a microscopic reproductive structure. About 30,000 species are known, with more than 10,000 being heterotrophic components of lichens.
(basidiomycotes, basidomycetes) Campbell p.618-19
Some of the common species are smuts, rusts, jelly fungi, mushrooms, puffballs, and stinkhorns. Many basidiomycotes form important symbioses with most forest trees and shrubs, called ectomycorrhizae.
(chytrids) Campbell p.613
Chytrids are microbes that live in fresh water or soil. They grow and feed by extending threadlike hyphae or rhizoids into living hosts, recently dead bodies, or other organic debris. Chytrids synthesize the amino acid lysine by the aminoadipic pathway. Other funguslike protoctists (oomycetes) metabolize by the diaminopimelic acid pathway.
All glomeromycetes form arbuscular mycorrhizae, a type of endomycorrhizae with symbiotic association with roots of plants. They reproduce asexually by the formation of blastospores.
(zygomycotes, zygomycetes) Campbell p.613-15
Many are saprobic, fedding osmotrophically - absorbing nutrients - on decaying vegetation. They mate by extending outgrowths from one another and merge to become a zygosporangium.