''Agaricus columellatus'' is a species of secotioid

fungus 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 ...

in the family Agaricaceae. The species was described by

William Henry Long William Henry Long (7 March 1867 – 10 December 1947) was an American mycologist. He obtained his Bachelor degree at Baylor University in Waco, Texas in 1888, and then served as Professor of Natural Sciences at this university until 1892. Long ent ...

in 1941. The type collection was made in

Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...

, where it was found growing singly on the ground in a grassy area in Mesquite-Catclaw flats. Originally described as the sole member of the

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

genus ''Araneosa'', in 2016

molecular genetic Molecular genetics is a sub-field of biology that addresses how differences in the structures or expression of DNA molecules manifests as variation among organisms. Molecular genetics often applies an "investigative approach" to determine the ...

studies revealed its affinity to the genus '' Agaricus''.

References

columellatus Fungi described in 1941 Fungi of Arizona Fungi without expected TNC conservation status {{Agaricaceae-stub

See also

References