Oudemansiella is a genus of fungi in the family Physalacriaceae. The genus contains about 15 species that are widely distributed in tropical and temperate regions. Yang and colleagues revised the genus in a 2009 publication, describing several new species and several varieties. They classified species in the genus into four sections based on the structure of the cap cuticle: Oudemansiella, Mucidula, Dactylosporina, and Radicatae. The genus name of Oudemansiella is in honour of Corneille Antoine Jean Abram Oudemans (1825–1906), who was a Dutch botanist and physician who specialized in fungal systematics. The genus was circumscribed by Carlos Luis Spegazzini in Anales Soc. Ci. Argent. vol.12 on page 23 in 1881.

Species

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