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 Basidiomycota () is one of two large divisions that, together with the Ascomycota, constitute the subkingdom Dikarya (often referred to as the "higher fungi") within the kingdom Fungi. Members are known as basidiomycetes. More specifically, Basi ...

(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-c ...

). The Agaricomycotina contain some 20,000 species, and about 98% of these are in the class

Agaricomycetes The Agaricomycetes are a class of fungi in the division Basidiomycota. The taxon is roughly identical to that defined for the Homobasidiomycetes (alternatively called holobasidiomycetes) by Hibbett & Thorn, with the inclusion of Auriculariales a ...

, which comprises most of the fungi known as

mushrooms A mushroom or toadstool is the fleshy, spore-bearing Sporocarp (fungi), 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 na ...

, 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 polypor ...

and

puffballs Puffballs are a type of fungus featuring a ball-shaped fruit body that bursts on impact, releasing a cloud of dust-like spores when mature. Puffballs belong to the division Basidiomycota and encompass several genera, including ''Calvatia'', ''Ca ...

. 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 constitut ...

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

Tremellomycetes The Tremellomycetes are a class of dimorphic fungi in the Agaricomycotina. Some species have gelatinous basidiocarps (fruiting bodies) or (microscopically) a sacculate parenthesome. There are six orders, 17 families, and 39 genera in the Tremel ...

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