''Chaenothecopsis vainioana'' is a species of

lichenicolous fungus A lichenicolous fungus is a parasitic fungus that only lives on lichen as the host. A lichenicolous fungus is not the same as the fungus that is the component of the lichen, which is known as a lichenized fungus. They are most commonly specific to ...

in the family

Caliciaceae The Caliciaceae are a family of mostly lichen-forming fungi belonging to the class Lecanoromycetes in the division Ascomycota. Although the family has had its classification changed several times throughout its taxonomic history, the use of mode ...

that is found in Europe. It was first formally described by Czech lichenologist

Josef Nádvorník Josef Nádvorník (13 February 1906 – 8 July 1977) was a Czech lichenologist. He was an authority on lichens of the order Caliciales and, in particular, the genus ''Physcia''. Biography Nádvorník was born in Plaňany on 13 February 1906. A ...

in 1940 as a member of the genus ''

Calicium ''Calicium'' is a genus of leprose lichens. It is in the family Caliciaceae. The sexual reproduction structures are a mass of loose ascospores that are enclosed by a cup shaped exciple sitting on top of a tiny stalk, having the appearance of ...

''. The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

honours Finnish lichenologist

Edvard August Vainio Edvard August Vainio (born Edvard Lang; 5 August 185314 May 1929) was a Finnish lichenology, lichenologist. His early works on the lichens of Lapland (Finland), Lapland, his three-volume monograph on the lichen genus ''Cladonia'', and, in parti ...

Leif Tibell Leif Tibell (born 16 November 1944) is a Swedish lichenologist and Emeritus Professor at the University of Uppsala. He is known for his expertise on calicioid lichens. He was awarded the Acharius Medal in 2012 for lifetime achievements in lich ...

transferred it to genus '' Chaenothecopsis'' in 1979. ''Calicium vainioanum'' has been reported growing on ''

Arthonia ''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 ...

'', ''

Lecanactis abietina ''Lecanactis abietina'' is a species of lichen belonging to the family Roccellaceae The Roccellaceae are a family of fungi in the order Arthoniomycetes. Most taxa are lichenized with green algae, although some are lichenicolous, growing on ot ...

'', and '' Calicium salicinum''.

References

Eurotiomycetes Fungi described in 1940 Fungi of Europe Taxa named by Josef Nádvorník {{Eurotiomycetes-stub