Usnea fulvoreagens information

Usnea fulvoreagens
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Lecanorales
Family:	Parmeliaceae
Genus:	Usnea
Species:	U. fulvoreagens
Binomial name
	Usnea fulvoreagens; (Räsänen) Räsänen (1935)
Synonyms
	Usnea glabrescens var. fulvoreagens Räsänen (1931);

Usnea fulvoreagens is a species of beard lichen in the family Parmeliaceae. It was first described by Finnish lichenologist Veli Räsänen in 1931 as a variety of Usnea glabrescens.^[2] He raised it to distinct species status in 1935. The lichen has a shrubby thallus that is richly branched, and bases that are blackened. The presence of norstictic acid is often used to differentiate this species from other similar species. It has a widespread distribution in Europe.^[3]

In 2002, Pekka Halonen and Teuvo Ahti proposed the conservation of Usnea fulvoreagens with a conserved type, to address discrepancies between the original Estonian material and the widely accepted species concept.^[4] This proposal, aimed at correcting issues with prior lectotypification attempts by Józef Motyka, which used non-original Finnish material now located in Russia, was initially met with ambiguity due to morphological differences among specimens on the proposed type sheet. After further clarification by Ahti, identifying a specific specimen as the conserved type, the Nomenclature Committee for Fungi supported the proposal more than two decades later, recognising the need for consistency in the taxonomic identification of this species.^[5]

^ Cite error: The named reference Species Fungorum synonymy was invoked but never defined (see the help page).
^ Cite error: The named reference Räsänen 1931 was invoked but never defined (see the help page).
^ Cite error: The named reference Randlane et al. 2009 was invoked but never defined (see the help page).
^ Cite error: The named reference Halonen & Ahti 2002 was invoked but never defined (see the help page).
^ Cite error: The named reference May & Lendemer 2023 was invoked but never defined (see the help page).

[Species_Fungorum_synonymy-1] Cite error: The named reference Species Fungorum synonymy was invoked but never defined (see the help page).

[Räsänen_1931-2] Cite error: The named reference Räsänen 1931 was invoked but never defined (see the help page).

[Randlane_et_al._2009-3] Cite error: The named reference Randlane et al. 2009 was invoked but never defined (see the help page).

[Halonen_&_Ahti_2002-4] Cite error: The named reference Halonen & Ahti 2002 was invoked but never defined (see the help page).

[May_&_Lendemer_2023-5] Cite error: The named reference May & Lendemer 2023 was invoked but never defined (see the help page).