The Class Trichomycetes is a group of fungi that live symbiotically in the guts of arthropods, especially insects and crustaceans. They are mostly non-pathogenic and aid in digestion by breaking down food materials. Trichomycetes reproduce via spores and are microscopic, filamentous, or yeast-like in form. They are ecologically important as gut symbionts and help maintain the health and nutrition of their host species.