A group of organisms formerly classified in the kingdom Fungi. Molecular studies have shown that fungi are more closely related to animals than plants, and both fungi and animals are now classified as opisthokonts. Fungi can either exist as single cells or make up a multicellular body called a mycelium, which consists of filaments known as hyphae. Most fungal cells are multinucleate and have cell walls composed chiefly of chitin. Fungi exist primarily in damp situations on land and, because of the absence of chlorophyll, are either parasites or saprotrophs on other organisms. The principal criteria used in classification are the nature of the spores produced and the presence or absence of cross walls within the hyphae (see Ascomycota; Basidiomycota; Deuteromycota; Zygomycota). See also lichens.
http://www.tolweb.org/Fungi/2377 Tree of Life survey of fungi, including phylogeny, plus many links to other sites
Subjects: Biological Sciences.