Some ascomycetes categorized as freshwater fungi
have also been reported from other habitats e.g. terrestrial
and marine habitats. Freshwater ascomycetes can be divided
into four groups based on their occurrence: (1) genera that are
known only from freshwater habitats; (2) genera found in both
freshwater and terrestrial habitats; (3) genera from freshwater
and marine habitats; and (4) genera that are found in freshwater,
marine and terrestrial habitats