The subdivision Agaricomycotina, also known as the

hymenomycetes Hymenomycetes was formerly the largest taxonomic group of fungi within the division Basidiomycota, but the term is no longer taxonomically relevant. Many familiar fungi belong to this class, including bracket fungi and toadstools. This class cont ...

, is one of three

taxa In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular nam ...

of the

fungal A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from th ...

division Basidiomycota (fungi bearing spores on

basidia A basidium () is a microscopic sporangium (a spore-producing structure) found on the hymenophore of fruiting bodies of basidiomycete fungi which are also called tertiary mycelium, developed from secondary mycelium. Tertiary mycelium is highly- ...

). The Agaricomycotina contain some 20,000 species, and about 98% of these are in the class Agaricomycetes, which comprises most of the fungi known as

mushrooms A mushroom or toadstool is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground, on soil, or on its food source. ''Toadstool'' generally denotes one poisonous to humans. The standard for the name "mushroom" is ...

, including the

bracket fungi Polypores are a group of fungi that form large fruiting bodies with pores or tubes on the underside (see Delimitation for exceptions). They are a morphological group of basidiomycetes-like gilled mushrooms and hydnoid fungi, and not all poly ...

and puffballs. Species in the Agaricomycotina that are not Agaricomycetes include the

jelly fungi Jelly fungi are a paraphyletic group of several heterobasidiomycete fungal orders from different classes of the subphylum Agaricomycotina: Tremellales, Dacrymycetales, Auriculariales and Sebacinales. These fungi are so named because their ...

, certain "

yeast Yeasts are eukaryotic, single-celled microorganisms classified as members of the fungus kingdom. The first yeast originated hundreds of millions of years ago, and at least 1,500 species are currently recognized. They are estimated to constit ...

s", ear fungi, and others; these are gathered together as the classes Tremellomycetes and

Dacrymycetes The Dacrymycetes are a class of fungi in the Basidiomycota. The class currently contains the single order Dacrymycetales, with a second proposed order Unilacrymales now treated at the family level. The order contains four families and has a cosmo ...

. Numerous species of Agaricomycotina are able to produce multicellular fruiting bodies, however, resupinate species form a hyphae structure. Yeast-forming species do not have the capacity to produce fruiting bodies.

References

* Hibbett DS, et al. 2007
A higher-level phylogenetic classification of the Fungi.
''Mycological Research'' 111:509–547. * Smith, G. M. 1955. ''Cryptogamic Botany, Vol. I, Algae and Fungi'', 2nd Ed. McGraw Hill Book Co., New York. 546 pp.

External links

* *
Tree of Life AgaricomycotinaHymenomycetes
at th
Tree of Life Web Project
*https://www.tandfonline.com/doi/full/10.1080/15572536.2006.11832621 {{Agaricomycotina-stub