genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of
lichen
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Arthoniaceae
The Arthoniaceae are a family of lichenized, lichenicolous and saprobic fungi in the order Arthoniales. The Arthoniaceae is the largest family of Arthoniales, with around 800 species. Most species in Arthoniaceae belong in '' Arthonia'' which is ...
. It was
circumscribed
In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius.
Not every polyg ...
by Swedish botanist Erik Acharius in 1806.
It is a genus of thin
crustose
Crustose is a habit of some types of algae and lichens in which the organism grows tightly appressed to a substrate, forming a biological layer. ''Crustose'' adheres very closely to the substrates at all points. ''Crustose'' is found on rocks and ...
lichen
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Arthonia caesia''
Image:Arthonia caesia-5.jpg, Photograph of a cross section of an apothecium of ''A. caesia'' taken through a compound microscope, x 400.
Image:Arthonia caesia-6.jpg, Photograph of two spores (3-septate, 4-celled) from ''Arthonia caesia'' taken through a compound microscope, x 1000. (spores measure 21 x 5
micrometre
The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Unit ...
Arthonia adhaerens
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californi ...
Arthonia alba
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
'' Müll. Arg., 1894
* ''
Arthonia albatula
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
'' (Müll. Arg.) Willey, 1890
* ''
Arthonia albida
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
'' C. Knight, 1860
* ''
Arthonia albinula
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
'' Nyl., 1886
* ''
Arthonia albofarinosa
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
'' Stirt., 1899
* ''
Arthonia albofuscescens
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
''
* ''
Arthonia albonigra
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
''
* ''
Arthonia albopulverea
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
''
* ''
Arthonia alborufella
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
''
* ''
Arthonia albovirens
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californi ...
Arthonia almquistii
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia amylospora
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Calif ...
Arthonia astropica
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia brussei
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia castanea
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia celtidis
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia cerei
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia curreyi
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia diplotypa
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Calif ...
Arthonia dispersella
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscription (taxonomy), circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen, crustose lichen of widely varying forms, commonly ...
Arthonia emersea
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia excipienda
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia gelidae
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia graphidicola
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Califo ...
''
* ''
Arthonia graphidis
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia isidiata
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia leightonii
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia lineola
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
''
* ''
Arthonia linitae
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia luridofusca
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia micrastera
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia neglecta
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia nudata
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia oxytera
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia perminuta
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia physciae
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia redingeri
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia saxorum
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia spadicea
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia stereocaulina
''Arthonia stereocaulina'' is a species of lichenicolous fungus in the family Arthoniaceae.
Distribution
''Arthonia stereocaulina'' has been reported from Alaska, Canada, Iceland, Russia and Svalbard.
Host species
As the name suggests, ''Artho ...
Arthonia subastroidella
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californi ...
Arthonia subdiffusa
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Californ ...
Arthonia swartzii
''Arthonia'' is a genus of lichens in the family Arthoniaceae. It was circumscribed by Swedish botanist Erik Acharius in 1806.
It is a genus of thin crustose lichen of widely varying forms, commonly called comma lichens.Field Guide to Calif ...