{{Short description|Genus of fungi}} {{Automatic_taxobox | image = | image_caption = | taxon = Uncobasidium | authority = Hjortstam & Ryvarden (1978) | type_species = ''Uncobasidium luteolum'' | type_species_authority = Hjortstam & Ryvarden (1978) | subdivision_ranks = Species | subdivision = ''U. luteolum''<br> ''U. roseocremeum'' }}

'''''Uncobasidium''''' is a genus of two species of crust fungi in the Meruliaceae family . The genus was circumscribed by mycologists Kurt Hjorstam and Leif Ryvarden in 1978 with the European fungus ''U.&nbsp;luteolum'' as the type species.<ref name="Hjorstam 1978"/> The South American species ''U.&nbsp;roseocremeum'' was added to the genus in 2012.<ref name="Gorjón 2012"/> The distinguishing feature of ''Uncobasidium'' is the basal hook in the basidium.

==Description== ''Uncobasidium'' forms a crust-like fruit body, which is spread out on the surface of the substrate. Its texture is softly membranous or byssoid (as if made of fibers). The hyphal system is monomitic, meaning it contains only generative hyphae. Individual hyphae are distinct when viewed with microscopy, and they range from thin to becoming thick walled, with clamp connections. The hyphae of the subiculum are usually straight and of uniform diameter. In contrast, the hyphae of the subhymenium are twisty and sometimes strongly bent. The basidia (pleurobasidia) are roughly uniform (swollen at the base). They are strongly constricted with a hook-shaped appendage, arising in the basal septum, with four sterigmata. The spores of ''Uncobasidium'' fungi are ellipsoid to obovate in shape, thin walled, and non-amyloid.<ref name="Hjorstam 1978"/>

==Species== *''Uncobasidium luteolum'' <small>Hjortstam & Ryvarden (1978)</small> *''Uncobasidium roseocremeum'' <small>Gorjón, Gresl. & Rajchenb. (2013)</small>

Some species proposed for inclusion in ''Uncobasidium'' have been referred to other genera, including: *''Uncobasidium albidum'' <small>(Hauerslev) Vesterh. (1996)</small><ref name="Knudsen & Hansen 1996"/> = ''Aphanobasidium albidum'' <small>(Hauerslev) Boidin & Gilles (1980)</small> *''Uncobasidium calongei'' <small>(Tellería) Hjortstam & Tellería (1990)</small><ref name="Tellería 1990"/> = ''Cerocorticium calongei''<small> Tellería (1985)</small> *''Uncobasidium notabile'' <small>(H.S.Jacks.) Tellería (1995)</small><ref name="Tellería & Melo 1995"/> = ''Radulomyces notabilis'' <small>(H.S.Jacks.) Parmasto (1968)</small>

==References== {{Reflist|colwidth=30em|refs=

<ref name="Gorjón 2012">{{cite journal |author1=Gorjón, Sergio P. |author2=Greslebin, Alina G. |author3=Rajchenberg, Mario |year=2012 |title=''Uncobasidium roseocremeum'' sp. nov. and other corticoid basidiomycetes from the Patagonian Andes of Argentina |journal=Mycotaxon |volume=121 |pages=349–364 |doi=10.5248/121.349 |url=http://www.cybertruffle.org.uk/cyberliber/59575/0121/0349.htm|hdl=11336/53307 |hdl-access=free }}</ref>

<ref name="Hjorstam 1978">{{cite journal |author1=Hjortstam, Kurt |author2=Ryvarden, Leif |year=1978 |title=Notes on Corticiaceae (Basidiomycetes) III |journal=Mycotaxon |volume=7 |issue=2 |pages=407–410 |url=http://www.cybertruffle.org.uk/cyberliber/59575/0007/002/0407.htm}}</ref>

<ref name="Knudsen & Hansen 1996">{{cite journal |author1=Knudsen, H. |author2=Hansen, L. |year=1996 |title= Nomenclatural notes to Nordic Macromycetes vol. 1 & 3 |journal=Nordic Journal of Botany |volume=16 |issue=2 |pages=211–221 |doi=10.1111/j.1756-1051.1996.tb00960.x}}</ref>

<ref name="Tellería 1990">{{cite journal |author=Tellería, M.T. |year=1990 |title=Annotated list of the Corticiaceae, sensu lato (Aphyllophorales, Basidiomycotina), for Peninsular Spain and Balearic Islands |journal=Bibliotheca Mycologica |volume=135 |page=118}}</ref>

<ref name="Tellería & Melo 1995">{{cite book |author1=Tellería, M.T. |author2=Melo, I. |year=1995 |title=Aphyllophorales resupinatae non poroides, I. ''Acanthobasidium''-''Cystostereum'' |series=Flora Mycologica Iberica |publisher=Real Jardín Botánico |volume=1 |page=161 |language=Spanish |isbn=978-3-443-65006-3}}</ref>

}}

{{Taxonbar|from=Q7882863}}

Category:Meruliaceae Category:Polyporales genera Category:Taxa named by Leif Ryvarden Category:Taxa described in 1978