Ascomycotas are also known as sac fungi. Ascomycota is the largest phylum of fungi that contains more than 30,000 species. The fungi of this phylum reproduce sexually, and produce ascospores in a sac-like structure, called ascus. However, some species are found to reproduce asexually. Some common Ascomycotas are, mushrooms, morels, yeasts, and truffles. They can be saprotrophs and parasites. They can also establish symbiotic relationships with plants. Aspergillus, Penicillium, and Claviceps are some important genera that belong to the phylum Ascomycota.