Amanita psammolimbata, a new species from Northeastern Brazilian sand dunes

Amanita psammolimbatula is described as a new species occurring on the sand dunes with 'restinga' vegetation from Rio Grande do Norte State, Brazil. This new and uncommon taxon is diagnosed by the small basidiomes (up to 42 mm in diam.), brownish yellow to pale whitish yellow toward margin, white lamella and stipe, white unchanging context, lack of narrow groove between the universal veil and the stipe base in the immarginate bulb, and basidiospores (8-) 9-11.5 x 5-7 (-7.5) mu m. Description, discussion, photograph and drawings of the new species are given.