Lecanoromycetes

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.

They are monophyletic (a group of taxa 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 Th.Fr. (1857) – 1 sp.
 * Ascographa Velen. (1934) - 1 sp.
 * Bartlettiella D.J.Galloway & P.M.Jørg. (1990) – 1 sp.
 * Bouvetiella Øvstedal (1986) – 1 sp.
 * Buelliastrum Zahlbr. (1930) – 1 sp.
 * Haploloma Trevis. (1857) – 1 sp.
 * Hosseusia Gyeln. (1940) – 3 spp.
 * Korfiomyces Iturr. & D.Hawksw. (2004) – 1 sp.
 * Maronella M.Steiner (1959) – 1 sp.
 * Notolecidea Hertel (1984) – 1 sp.
 * Petractis Fr. (1845) – 3 spp.
 * Piccolia A.Massal. (1956) – 10 spp.
 * Ravenelula Speg. (1881) – 2 spp.
 * Robincola Velen. (1947) – 1 sp.
 * Roburnia Velen. (1947) – 1 sp.