''Clavascidium'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
of
lichens in the family
Verrucariaceae.
The genus 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 ...
in 1996 by Austrian lichenologist Othmar Breuss.
Because the
type species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specime ...
of the genus, ''Clavascidium umbrinum'', has been shown using
molecular phylogenetics
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...
to belong to genus ''
Placidium'',
Cécile Gueidan and colleagues proposed to unite ''Clavascidium'' with ''Placidium'' in a 2009 publication.
Despite this, the genus has been retained in recent publications of fungal classification.
Species
*''
Clavascidium antillarum''
*''
Clavascidium imitans''
*''
Clavascidium kisovense''
*''
Clavascidium krylovianum''
*''
Clavascidium lacinulatum''
*''
Clavascidium pseudorufescens''
*''
Clavascidium semaforonense''
*''
Clavascidium sinense''
– China
A couple of species once proposed for inclusion in this genus are now classified in other genera:
*''Clavascidium liratum'' is now ''
Anthracocarpon virescens''
*''Clavascidium umbrinum'' is now ''
Placidium umbrinum''.
A proposed generic transfer of ''Catapyrenium alvarense'' to ''Clavascidium'' in 2017
was
invalidly published according to
nomenclatural rules.
References
Eurotiomycetes genera
Lichen genera
Verrucariales
{{Eurotiomycetes-stub