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Stephanospora mayana 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 Haematoxylum campechianum, Gymnopodium floribundum, Coccoloba diversifolia, Metopium brownei and Pinus caribaea. It differs from the American species of Stephanospora, like S. michoacanensis and S. chilensis, by its larger basidiospores. Descriptions, photographs and discussions are presented.