''Diplotomma alboatrum'' is a species 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.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 mo ...

. It was first described as ''Lichen alboater'' by German lichenologist

Georg Franz Hoffmann Georg Franz Hoffmann was a German botanist and lichenologist. He was born on 13 January 1760 in Marktbreit, Germany, and died on 17 March 1826 in Moscow, Russia. Professional career After graduating from the University of Erlangen in 1786, he w ...

in 1784.

Julius von Flotow Julius von Flotow; full name- Julius Christian Gottlieb Ulrich Gustav Georg Adam Ernst Friedrich von Flotow (9 March 1788 – 15 August 1856) was a German military officer and a botanist specialized in lichenology and bryology. Von Flotow was bor ...

transferred it to the genus ''

Diplotomma ''Diplotomma'' is a genus of lichenized fungi in the family Caliciaceae. The genus has a widespread distribution and contains about 29 species. The genus was circumscribed by Julius von Flotow in 1849. It was later wrapped into ''Buellia'' befo ...

'' in 1849. The lichen is widely distributed, and has been recorded in Europe, North America, and Australasia.

References

Caliciales Lichen species Lichens described in 1784 Lichens of Australia Lichens of Europe Lichens of New Zealand Lichens of North America Taxa named by Georg Franz Hoffmann {{Caliciales-stub