2. • Mycorrhizae fungi: Symbiotic Fungi
• Saprotrophic fungi: Decomposers
• Parasitic fungi: Fungi that leech nutrients from other
organisms
• Pathogenic fungi: Disease-causing fungi

3. • Most mycologists currently recognize
five phyla of fungi.

4. • Name: Chytrids
• 1,000 species
• Asexual spores and sexual gametes are
motile; they have flagella.
• They are the only fungal group with
flagellated cells.
• They live mostly in water.
• Are thought to be one of the earliest
fungal groups to branch off from other
fungi.

5. • Name: Zygomycetes
• 1,000 species
• They are terrestrial, meaning they live on
land.
• They are mostly saprotrophs
(decomposers), though there are some
parasitic species, and a very small
percentage that are neutral.
• The hyphae (filaments) lack septa (internal
cross walls); only in their reproductive
structures are there septa.
• The hyphae of some grow rapidly into food
or fruits.

6. • Name: Glomeromycetes
• 160 species
• Because of their arbuscular
mycorrhizae, these fungi are very
important ecologically.
• Many plants form mycorrhizal
relationships with glomeromycetes.

7. • Name: Acomycetes
• 65,000 species
• Commonly known as sac fungi.
• A diverse group that includes organisms that live in
marine, freshwater, and terrestrial habitats.
• Examples: yeast, molds, morels, truffles
• Important in digesting cellulose (found in plants), lignin
(found in wood) , and collagen (found in connective
tissues of animals).
• Many form lichens which share a symbiotic relationship
between fungi and a photosynthetic cell.

8. • Name: Basidiomycetes
• Often make important decomposers and
ectomycorrhial fungi.
• Commonly called club fungi.
• Unusual in having long-lived, dikaryotic
mycelium.
• The fruit of the organisms are what we call
mushrooms.
• Asexual reproduction is rare.