Which fungi group includes Alternaria species?

The group that includes Alternaria species is accurately classified under Ascomycetes. This is because Alternaria fungi are characterized by their production of ascospores within a sac-like structure known as an ascus, which is a defining feature of the Ascomycetes.

Ascomycetes, often referred to as sac fungi, encompass a wide variety of fungi that can be found in diverse environments. In addition to Alternaria, this group includes important fungi that have significant agricultural and medical implications, such as species that cause plant diseases and others used in food production, like yeasts.

Considering the other options, Fungi Imperfecti refers to fungi where sexual reproduction has not been observed; it is more of a classification based on the lack of observed sexual structures. Although Alternaria is classified in this informal group due to its asexual reproductive mode, ultimately, it is the Ascomycetes that properly encompass Alternaria based on its characteristics. Zygomycetes and Basidiomycetes represent other groups of fungi that have distinct reproductive structures and life cycles that do not apply to Alternaria, therefore reinforcing why the correct classification is within the Ascomycetes.