''Lecidea'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
crustose lichen
A lichen ( , ) is a hybrid colony (biology), colony of algae or cyanobacteria living symbiotically among hypha, filaments of multiple fungus species, along with yeasts and bacteria embedded in the cortex or "skin", in a mutualism (biology), m ...
s with a carbon-black ring or outer margin (
exciple) around the fruiting body disc (
apothecium), usually (or always) found growing on (
saxicolous) or in (
endolithic) rock.
[Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ] Lichens that have such a black exciple are called
lecideine, meaning "like ''Lecidea'', even if they are not in this genus.
[ Members of the genus are commonly called disk lichens or tile lichens.][
]
Selected species
According to the ''Dictionary of the Fungi'' (10th edition, 2008), the widespread genus contains an estimated 427 species.[
* '' Lecidea atrobrunnea''
* '' Lecidea hassei''
* '' Lecidea keimioeensis''
* '' Lecidea laboriosa''
* '' Lecidea lithophila''
]
References
*
Lecideales genera
Lichen genera
Taxa named by Erik Acharius
Taxa described in 1803
{{Lecanoromycetes-stub