{{Short description|Genus of fungi}} {{Automatic_taxobox | image = Pirex concentricus, Monte Bello Open Space Preserve, Santa Clara County, US-CA, US imported from iNaturalist photo 174461422.jpg | image_caption = | taxon = Pirex | authority = Hjortstam & Ryvarden (1985) | type_species = ''Pirex concentricus'' | type_species_authority = (Cooke & Ellis) Hjortstam & Ryvarden (1985) | synonyms_ref = <ref name="Species Fungorum synonymy"/> | synonyms = *''Radulum concentricum'' <small>Cooke & Ellis (1885)</small> *''Phlebia concentrica'' <small>(Cooke & Ellis) Kropp & Nakasone (1985)</small><ref name="Kropp 1985"/> *''Pseudolagarobasidium concentricum'' <small>(Cooke & Ellis) Hjortstam (1995)</small><ref name="Hjortstam 1995"/> }}
'''''Pirex''''' is a fungal genus in the family Meruliaceae. It is a monotypic genus, containing the single crust fungus '''''Pirex concentricus'''''. It is found in the Pacific Northwest region of North America, where it causes a white rot in woody hardwood and conifer debris generated by timber harvesting.<ref name="Kropp 1985"/>
==Taxonomy== The species ''Pirex concentricus'' was originally described by Mordecai Cubitt Cooke and Job Bicknell Ellis in 1885 as ''Radulum concentricum''. Ellis collected the type specimens from Oregon.<ref name="Cooke 1885"/> A century after Cooke's publication, Kurt Hjortstam and Leif Ryvarden circumscribed the new genus ''Pirex'' to contain this fungus, as they believed it to have a unique combination of traits that would not adequately fit into any other known genera. The name ''Pirex'' is an anagram of the fungal genus ''Irpex''.<ref name="Hallenberg 1985"/>
In 1995, Hjortstam considered ''Pirex'' to be a synonym of ''Pseudolagarobasidium'', and proposed the new combination ''Pseudolagarobasidium concentricum''. Modern systematics considers the two genera to be distinct;<ref name="Hallenberg 2008"/> ''Pseudolagarobasidium'' is classified in the family Phanerochaetaceae. Hjortstam added ''Hydnum subvinosum'' Berk. & Broome to ''Pirex'' in 1987,<ref name="Hjortstam 1987"/> but this fungus is considered now a species of ''Radulodon''.<ref name="Index Fungorum: Pirex subvinosus"/> ==References== {{Reflist|refs=
<ref name="Cooke 1885">{{cite journal |author=Cooke, M.C. |year=1885 |title=Some exotic fungi |journal=Grevillea |volume=14 |issue=69 |pages=11–14 |url=http://www.cybertruffle.org.uk/cyberliber/59649/0014/069/0011.htm}}</ref>
<ref name="Hallenberg 1985">{{cite journal |author1=Hallenberg, Nils |author2=Hjortstam, Kurt |author3=Ryvarden, Leif |year=1985 |title=''Pirex'' genus nova (Basidiomycetes, Corticiaceae) |journal=Mycotaxon |volume=24 |pages=287–291 |url=http://www.cybertruffle.org.uk/cyberliber/59575/0024/0287.htm}}</ref>
<ref name="Hallenberg 2008">{{cite journal |author1=Hallenberg, Nils |author2=Ryberg, Martin |author3=Nilsson, R. Henrik |author4=Wood, Alan R. |author5=Wu, Sheng-Hua |year=2008 |title=''Pseudolagarobasidium'' (Basidiomycota): on the reinstatement of a genus of parasitic, saprophytic, and endophytic resupinate fungi |journal=Canadian Journal of Botany |volume=86 |issue=11 |pages=1319–1325 |doi=10.1139/B08-088}}</ref>
<ref name="Hjortstam 1987">{{cite journal |author=Hjortstam, K. |year=1987 |title=A check-list to genera and species of corticioid fungi (Hymenomycetes) |journal=Windahlia |volume=17 |pages=:55–85}}</ref>
<ref name="Hjortstam 1995">{{cite journal |author=Hjortstam, Kurt. |year=1995 |title=Two new genera and some new combinations of corticioid fungi (Basidiomycotina, Aphyllophorales) from tropical and subtropical areas |journal=Mycotaxon |volume=54 |pages=183–193 |url=http://www.cybertruffle.org.uk/cyberliber/59575/0054/0183.htm}}</ref>
<ref name="Index Fungorum: Pirex subvinosus">{{cite web |title=Record Details: ''Pirex subvinosus'' (Berk. & Broome) Hjortstam |url=http://www.indexfungorum.org/names/NamesRecord.asp?RecordID=132988 |publisher=Index Fungorum. CAB International |access-date=2016-10-06}}</ref>
<ref name="Kropp 1985">{{cite journal |author1=Kropp, Bradley R. |author2=Nakasone, Karen K. |year=1985 |title=Redisposition of ''Radulum concentricum'' (Aphyllophorales, Corticiaceae) |journal=Mycotaxon |volume=24 |pages=423–429 |url=http://www.cybertruffle.org.uk/cyberliber/59575/0024/0423.htm}}</ref>
<ref name="Species Fungorum synonymy">{{cite web |title=GSD Species Synonymy: ''Pirex concentricus'' (Cooke & Ellis) Hjortstam & Ryvarden |url=http://www.speciesfungorum.org/GSD/GSDspecies.asp?RecordID=104642 |publisher=Species Fungorum. CAB International |access-date=2016-10-06}}</ref>
}}
{{Taxonbar|from=Q7197964}}
Category:Fungi of Canada Category:Fungi of the United States Category:Meruliaceae Category:Monotypic Polyporales genera Category:Taxa named by Leif Ryvarden Category:Taxa described in 1985