Lecanoromycetes is the largest class of lichenized fungi. It belongs to the subphylum Pezizomycotina in the phylum Ascomycota. The asci (spore-bearing cells) of the Lecanoromycetes most often release spores by rostrate dehiscence.
The group is monophyletic (composed only of all the descendants of a common ancestor).
Genera of uncertain placement There are several genera in the Lecanoromycetes that have not been placed into any order or family. These are: Argopsis – 1 sp. Ascographa – 1 sp. Bartlettiella – 1 sp. Bouvetiella – 1 sp. Buelliastrum – 2 spp. Haploloma – 1 sp. Hosseusia – 1 sp. Korfiomyces – 1 sp. Maronella – 1 sp. Petractis – 3 spp. Piccolia – 10 spp. Ravenelula – 2 spp. Robincola – 1 sp. Roburnia – 1 sp.
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