Cyttariales Erysiphales Helotiales Lahmiales Lauriomycetales Leotiales Marthamycetales Medeolariales Micraspidales Phacidiales Rhytismatales Thelebolales Families incertae sedis Genera incertae sedis The Leotiomycetes are a class of ascomycete fungi.

Molecular studies have recently shed some new light to the still obscure systematics.

Most scholars consider Leotiomycetes a sister taxon to Sordariomycetes in the phylogenetic tree of Pezizomycotina.

Its division into subclasses have received strong support by the molecular data, but the overall monophyly of Leotiomycetes is dubious.

[2] More orders were added in 2020, Lahmiales, Lauriomycetales, Marthamycetales, Medeolariales, Micraspidales and Phacidiales.