Appressodiscus

Appressodiscus is a small genus of lichen-forming fungi in the family Ramalinaceae. It comprises two species.^[1] The genus was circumscribed in 2023 by André Aptroot and Lidiane Alves dos Santos. Both species are found in Brazil, where they grow as corticolous (bark-dwelling) crustose lichens. Characteristics of the genus include flat apothecia (fruiting bodies), an excipulum with a prosoplectenchymatous tissue structure, eight-spored asci with an ocular chamber, and simple (non-septate) ascospores. Appressodiscus has a sister relationship with the genus Phyllopsora.^[2]

Appressodiscus
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Lecanorales
Family:	Ramalinaceae
Genus:	Appressodiscus Aptroot & L.A.Santos (2023)
Type species
Appressodiscus isidiobadius Aptroot & L.A.Santos (2023)
Species
A. badius A. isidiobadius