''Xanthoconium'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of bolete fungi in the family Boletaceae. It was

circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. Not every polyg ...

by mycologist

Rolf Singer Rolf Singer (June 23, 1906 – January 18, 1994) was a Germany, German-born mycologist and one of the most important Taxonomy (biology), taxonomists of gilled mushrooms (agarics) in the 20th century. After receiving his Ph.D. at the University ...

in 1944, who included ''Boletus affinis'' and what was then known as ''Gyroporus stramineus'' as the

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...

. These two species were part of the "strange group of species described by

Murrill Murrill is a surname. Notable people with the surname include: * Herbert Murrill (1909–1952), English musician, composer, and organist * William Murrill William Alphonso Murrill (October 13, 1869 – December 25, 1957) was an American myc ...

and Snell as white-spored ''Gyropori'', and separated by the latter under the new generic name ''Leucogyroporus''." C.B. Wolfe described three species from the United States in 1987: '' X. chattoogaense'', '' Xanthoconium montaltoense'', and '' X. montanum''. , the nomenclatural database Index Fungorum list seven species in ''Xanthoconium''. The concept of ''Xanthoconium'' has been not fully described using

molecular phylogenetic Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

analysis, but it is clearly a distinct genus, apart from '' Boletus''. However, '' Xanthoconium separans'' was found to be more closely related to '' Boletus

Sensu stricto ''Sensu'' is a Latin word meaning "in the sense of". It is used in a number of fields including biology, geology, linguistics, semiotics, and law. Commonly it refers to how strictly or loosely an expression is used in describing any particular co ...

'' than to ''Xanthoconium''.

Species

*'' Xanthoconium affine'' (Peck) Singer (1944) *'' Xanthoconium chattoogaense'' Wolfe (1987) :Known only from the type locality, along a tributary of the Chattooga River in

North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and So ...

. *'' Xanthoconium montaltoense'' Wolfe (1987) :Found in south-central

Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...

. *'' Xanthoconium montanum'' Wolfe (1987) :Found in Macon County,

, in Nantahala National Forest. *'' Xanthoconium purpureum'' Snell & E.A.Dick (1962) *'' Xanthoconium stramineum'' (Murrill) Singer (1944)

References

Boletaceae Boletales genera Taxa named by Rolf Singer {{Boletales-stub