Phylum Ascomycota Cavalier-Smith

This Phylum, or Division, is also known as the ascomycetes (it was once a Class). This group includes the morels, false morels, cup fungi, various flask fungi, most lichens, yeasts, molds, and others. All of these sac fungi have their sexual spores produced inside of a sac-shaped cell, the ascus. The phylum contains 3 subphyla and 16 classes. Classification follows Lumbsch and Huhndorf (2010).

1. Taphrinomycotina (4 classes)
   • Neolectomycetes (1 order)
   • Pneumocystidomycetes (1 order)
   • Schizosaccharomycetes (1 order)
   • Taphrinomycetes (1 order)
2. Saccharomycotina (1 class)
   • Saccharomycetes (1 order)
3. Pezizomycotina (11 classes)
   • Arthoniomycetes (1 order)
   • Dothideomycetes (11 orders)
   • Eurotiomycetes (7 orders)
   • Geoglossomycetes (1 order)
   • Laboulbeniomycetes (2 orders)
   • Lecanoromycetes (10 orders)
   • Leotiomycetes (5 orders)
   • Lichinomycetes (1 order)
   • Orbiliomycetes (1 order)
   • Pezizomycetes (1 order)
   • Sordariomycetes (18 orders)
   • Uncertain placement (3 orders and 1 family)
4. Uncertain placement (many families and genera)