Faseriaceae

Faseriaceae is a family of fungi in the kingdom Fungi. The taxonomic placement of Faseriaceae has been variable over time, with different classifications proposing membership in several ascomycete lineages. As molecular phylogenetic studies have accumulated, the circumscription and higher‑level placement of the family have remained subject to change, and some sources treat it as incertae sedis within the Ascomycota until further data clarify its relationships.

Description and scope: The family has a relatively small number of described genera and species compared with more prominent fungal groups. Traditional taxonomy has used aspects of fruiting body morphology, the structure of ascomata or conidiomata, and spore types to define taxa within Faseriaceae, but there is no single universally diagnostic character that defines the group across all members. Ongoing revisions in fungal systematics have led to reclassification of some species formerly placed in Faseriaceae into other families as DNA sequence data update taxonomy.

Ecology and distribution: Members are typically saprotrophic, feeding on plant substrata such as wood, leaf litter, and other decaying matter. They have been reported from a range of regions and climates, with distribution tied to substrate availability and habitat. Some taxa may occur as endophytes or in specialized microhabitats, but robust ecological data are limited due to the rarity of reported species.

Taxonomic status: Faseriaceae is treated in several checklists as provisional or uncertainly placed within the fungal taxonomy. Its exact number of genera and species, and their relationships to other fungal lineages, remain unresolved pending further molecular analyses and broader sampling.