''Blastodesmia'' is a

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unisp ...

fungal

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 ...

in the family

Pyrenulaceae The Pyrenulaceae are a family of mostly lichenized fungi in the order Pyrenulales. The family was circumscribed by the German botanist Gottlob Ludwig Rabenhorst in 1870. Species in the family have a widespread distribution, but are especially pr ...

. It contains the single species ''Blastodesmia nitida'', a

corticolous This glossary of mycology is a list of definitions of terms and concepts relevant to mycology, the study of fungi. Terms in common with other fields, if repeated here, generally focus on their mycology-specific meaning. Related terms can be found ...

(bark-dwelling)

crustose lichen Crustose lichens are lichens that form a crust which strongly adheres to the Substrate (biology), substrate (soil, rock, tree bark, etc.), making separation from the substrate impossible without destruction. The basic structure of crustose lichen ...

found in Europe. Both the genus and the species were described in 1852 by the Italian botanist Abramo Bartolommeo Massalongo. Historically, two other species have been included in the genus, but are currently not accepted by

Species Fungorum ''Index Fungorum'' is an international project to index all formal names (Binomial nomenclature, scientific names) in the fungus Kingdom (biology), kingdom. As of 2015, the project is based at the Royal Botanic Gardens, Kew, one of three partn ...

: * ''Blastodesmia albonigra'' * ''Blastodesmia lactea'' Characteristics of genus ''Blastodesmia'' include

paraphyses Paraphyses are erect sterile filament-like support structures occurring among the reproductive apparatuses of fungi, ferns, bryophytes and some thallophytes. The singular form of the word is paraphysis. In certain fungi, they are part of the f ...

in the , transversely septate that are grey to brown in colour, and pyrenocarp-type ascomata with ascoma walls. The ascospores are mostly 37–47

μm The micrometre (Commonwealth English as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, is a unit of length in the International System ...

long and have a constriction at the

septa SEPTA, the Southeastern Pennsylvania Transportation Authority, is a regional public transportation authority that operates bus, rapid transit, commuter rail, light rail, and electric trolleybus services for nearly four million people througho ...

References

Pyrenulales Eurotiomycetes genera Lichen genera Taxa described in 1852 Taxa named by Abramo Bartolommeo Massalongo {{Eurotiomycetes-stub