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 before being segregated from that genus by David Hawksworth in 1980.

Selected species
Diplotomma alboatrum
Diplotomma cedricola
Diplotomma chlorophaeum
Diplotomma epipolium
Diplotomma hedinii
Diplotomma murorum
Diplotomma pharcidium
Diplotomma rivas-martinezii
Diplotomma scheideggerianum
Diplotomma venustum
Diplotomma vezdanum