Stephanosporamayana (Stephanosporaceae, Russulales), a new sequestrate fungus from Yucatán Peninsula, Mexico

Abstract. Stephanosporamayana is presented as a new species from the Yucatán Peninsula, Mexico. This species is distinguished by the yellowish pileus, basidiospores with a small corona (4–6 × 1–2.5 µm), and variable size (8.0–17.0 × 6.0–11.0), thin pileus (21–40 µm) and the ecological association to lowland forest with Haematoxylumcampechianum, Gymnopodiumfloribundum, Coccolobadiversifolia, Metopiumbrownei and Pinuscaribaea. It differs from the American species of Stephanospora, like S.michoacanensis and S.chilensis, by its larger basidiospores. Descriptions, photographs and discussions are presented.