''Cyphelium tigillare'' is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

lignicolous 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 ...

(wood-dwelling)

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 ...

in the family

Caliciaceae The Caliciaceae are a family (taxonomy), family of mostly lichen-forming fungus, fungi belonging to the class (taxonomy), class Lecanoromycetes in the division (mycology), division Ascomycota. Although the family has had its classification chan ...

, and the

type species In International_Code_of_Zoological_Nomenclature, 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 spe ...

of the genus ''

Cyphelium ''Cyphelium'' is a genus of crustose areolate lichens with cup-like apothecia filled with sooty black spores.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, The genus is in the family Caliciaceae . The genus ha ...

''. Widespread in North America, it commonly grows on fenceposts.

References

Lichens described in 1798 Lichens of North America Lichen species Caliciales Taxa named by Erik Acharius {{Caliciales-stub