''Xenasma'' 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
corticioid fungi
The corticioid fungi are a group of fungi in the Basidiomycota typically having effused, smooth basidiocarps (fruit bodies) that are formed on the undersides of dead tree trunks or branches. They are sometimes colloquially called crust fungi or pa ...
in the order
Polyporales
The Polyporales are an order of about 1800 species of fungi in the division Basidiomycota. The order includes some (but not all) polypores as well as many corticioid fungi and a few agarics (mainly in the genus ''Lentinus''). Many species within ...
. 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
Marinus Anton Donk
Marinus Anton Donk (14 August 1908 – 2 September 1972) was a Dutch mycologist. He specialized in the taxonomy and nomenclature of mushrooms. Rolf Singer wrote in his obituary that he was "one of the most outstanding figures of contemporary myc ...
in 1957.
Species
*''
Xenasma aculeatum''
C.E.Gómez (1972) – Argentina
*''
Xenasma amylosporum''
Parmasto (1968)
*''
Xenasma longicystidiatum''
Boidin & Gilles (2000) –
Réunion Island
Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island o ...
*''
Xenasma parvisporum''
Pouzar (1982)
*''
Xenasma praeteritum''
(H.S.Jacks.) Donk (1957) – Cameroon; Jamaica; Puerto Rico
*''
Xenasma pruinosum''
(Pat.) Donk (1957) – Great Britain
*''
Xenasma pulverulentum
''Xenasma'' is a genus of corticioid fungi in the order Polyporales. It was circumscribed by mycologist Marinus Anton Donk in 1957.
Species
*'' Xenasma aculeatum'' C.E.Gómez (1972) – Argentina
*'' Xenasma amylosporum'' Parmasto (1968)
*'' Xe ...
''
(Litsch.) Donk (1957) – Dominican Republic; France; Great Britain; Jamaica; Netherlands
*''
Xenasma rimicola''
(P.Karst.) Donk (1957) – Portugal; Taiwan
*''
Xenasma subclematidis''
S.S.Rattan (1977) – Asia
*''
Xenasma tulasnelloideum''
(Höhn. & Litsch.) Donk (1957) – Cameroon; Dominican Republic; Great Britain; Ontario; Portugal
*''
Xenasma vassilievae''
Parmasto (1965) – Europe
References
Polyporales
Polyporales genera
Taxa named by Marinus Anton Donk
Taxa described in 1957
{{Polyporales-stub