Parvoplaca
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''Parvoplaca'' is a genus 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.fungi in the family Teloschistaceae. 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 po ...
in 2013 by Ulrik Søchting, Patrik Frödén, and Ulf Arup.


Species

*'' Parvoplaca athallina'' *'' Parvoplaca candanii'' – Antarctica *'' Parvoplaca chelyae'' *'' Parvoplaca lamprocarpa'' – Alaska *'' Parvoplaca macroborealis'' Oregon, USA *'' Parvoplaca nigroblastidiata'' – Europe; Alaska *'' Parvoplaca servitiana'' *'' Parvoplaca suspiciosa'' *''
Parvoplaca tenebrosa ''Parvoplaca'' is a genus of lichen-forming fungi in the family Teloschistaceae. The genus was circumscription (taxonomy), circumscribed in 2013 by Ulrik Søchting, Patrik Frödén, and Ulf Arup. Species *''Parvoplaca athallina'' *''Parvoplaca ...
'' – Oregon, USA *''
Parvoplaca tiroliensis ''Parvoplaca tiroliensis'' is a species of crustose lichen in the family Teloschistaceae, and the type species of the genus ''Parvoplaca''. It is widely distributed, and has been recorded growing on a variety of , including moss, dead plant m ...
''


Description

''Parvoplaca'' is a genus of crustose lichens with small, usually yellow or blackened apothecia. The
spore In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores form part of the life cycles of many plants, algae, f ...
s are with a
septum In biology, a septum (Latin for ''something that encloses''; plural septa) is a wall, dividing a cavity or structure into smaller ones. A cavity or structure divided in this way may be referred to as septate. Examples Human anatomy * Interatri ...
. No pycnidia are seen.


Distribution and habitat

''Parvoplaca'' is mainly distributed in polar regions but also in the
boreal Boreal may refer to: Climatology and geography *Boreal (age), the first climatic phase of the Blytt-Sernander sequence of northern Europe, during the Holocene epoch *Boreal climate, a climate characterized by long winters and short, cool to mild ...
zone and the Mediterranean. Species of ''Parvoplaca'' generally grow on moss or detritus but are also found growing on
bark Bark may refer to: * Bark (botany), an outer layer of a woody plant such as a tree or stick * Bark (sound), a vocalization of some animals (which is commonly the dog) Places * Bark, Germany * Bark, Warmian-Masurian Voivodeship, Poland Arts, ...
.


References

Lichen genera Teloschistales Taxa described in 2013 Teloschistales genera Taxa named by Ulrik Søchting Taxa named by Patrik Frödén Taxa named by Ulf Arup {{Teloschistales-stub