Leucoagaricus taniae sp. nov. (Agaricaceae), a sand-dwelling mushroom from Brazil

Leucoagaricus taniae (Agaricaceae) is described as new to science. It was found growing in sand at Armação beach on Santa Catarina Island in Southern Brazil covered by sand among Canavalia rosea (Fabaceae) and Cyperus pedunculatus (Cyperaceae). The new species has a cream white pileus that is up to 50 mm in diameter and exudes golden drops when fresh. The stipe is up to 60 mm height, with rhizomorphs at the end of the volvate base. Photographs of fresh basidiomes in situ and illustrations of the main micromorphological features are presented. A molecular-phylogenetic analysis that includes the species is also presented.