1. Ascomycota: This is the largest phylum of fungi, containing over 64,000 species. Ascomycetes are characterized by their production of spores in sac-like structures called asci. Examples include yeasts, truffles, and morels.

2. Basidiomycota: This phylum contains about 30,000 species, including mushrooms, toadstools, puffballs, and shelf fungi. Basidiomycetes are distinguished by their club-shaped reproductive structures called basidia.

3. Zygomycota: This phylum contains around 1,000 species, including bread molds and some soil fungi. Zygomycetes reproduce sexually by forming a thick-walled zygospore.

4. Glomeromycota: This phylum contains only about 200 species, but they are incredibly important for their symbiotic relationships with plants. Glomeromycetes form arbuscular mycorrhizae, which help plants absorb nutrients from the soil.

While these are the four major phyla, it's important to note that fungal taxonomy is still evolving. Some scientists suggest a fifth major phylum, Chytridiomycota, which includes mostly aquatic fungi.