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Basidiolichens are lichenized members of the Basidiomycota that form a much smaller group of lichens than the far more common ascolichens in the Ascomycota. In arctic, alpine, and temperate forests, the most common basidiolichens are in the agaric genus Lichenomphalia^[1] (including former members of Omphalina or Gerronema) and the clavarioid genus Multiclavula.^[2] Several lichenized genera occur in tropical regions, the most common being the foliose Dictyonema. Previously basidiolichens had been classified in their own subclass, Basidiolichenes. Molecular based phylogeny does not support classification of the genera together.

Taxonomy and classification

Basidiolichen mycobionts comprise 172 known species across 15 genera, 5 families, and 5 orders within the class Agaricomycetes.^[3] The majority of described basidiolichen mycobionts belong to the genus Cora, followed by the genera Dictyonema and Multiclavula. Other genera include Acantholichen, Arrhenia, Athelia, Athelopsis, Corella, Cyphellostereum, Ertzia, Lepidostroma, Lichenomphalia, Marchandiomphalina, Semiomphalina, and Sulzbacheromyces.^[3]^[4] The species Marasmiellus affixus is suggested to be yet another lichen-forming basidiomycete,^[5] but this has yet to be proven.^[4]^[6]

Basidiolichen photobionts frequently belong to the cyanobacterial genus Scytonema or the algal genus Coccomyxa.^[4]

Secondary metabolites

The lichen species Cora glabrata has been reported to produce a hemagglutinating lectin^[7] as well as various polysaccharides, including a unique (1→6)-linked β-D-mannan.^[8]

References

^ "Lichenomphalia umbellifera. photo - cvcc photos at pbase.com". Retrieved 2009-01-12.
^ "Multiclavula corynoides". Archived from the original on 23 December 2008. Retrieved 2009-01-12.
^ ^a ^b Lücking, Robert; Hodkinson, Brendan P.; Leavitt, Steven D. (2017-01-03). "The 2016 classification of lichenized fungi in the Ascomycota and Basidiomycota – Approaching one thousand genera". The Bryologist. 119 (4): 361. doi:10.1639/0007-2745-119.4.361. ISSN 0007-2745.
^ ^a ^b ^c Oberwinkler, F. (2012), Hock, Bertold (ed.), "16 Basidiolichens", Fungal Associations, Berlin, Heidelberg: Springer, pp. 341–362, doi:10.1007/978-3-642-30826-0_16, ISBN 978-3-642-30826-0, retrieved 2024-09-17
^ Dennis, R. W. G.; Singer, R. (1973). "The Genera Marasmiellus, Crepidotus and Simocybe in the Neotropics". Mycologia. 66 (2): 382. doi:10.2307/3758379. ISSN 0027-5514.
^ "Marasmiellus affixus - Lichen Case Studies". www.anbg.gov.au. Retrieved 2024-10-19.
^ Elifio, Selene L.; De Lourdes C. C. Da Silva, Maria; Iacomini, Marcello; Gorin, Philip A. J. (2000-11-27). "A lectin from the lichenized Basidiomycete Dictyonema glabratum". New Phytologist. 148 (2): 327–334. doi:10.1046/j.1469-8137.2000.00758.x. ISSN 0028-646X.
^ Carbonero, E (2002-01-10). "A (1→6)-linked β-mannopyrananan, pseudonigeran, and a (1→4)-linked β-xylan, isolated from the lichenised basidiomycete Dictyonema glabratum". FEMS Microbiology Letters. 206 (2): 175–178. doi:10.1016/S0378-1097(01)00506-7.

External links

BioImages Several photos of Lichenomphalia umbellifera
New Zealand Fungi Images of Lichenomphalia alpina and its synonyms
The Field Museum Photos of several lichens, including Dictyonema

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