An unexpected new species of Tapinella (Basidiomycota, Boletales) with hymenial cystidia from the Amazon

Tapinella cystidiosa is described here as a new species from the Amazon characterized by possessing lateral to eccentric stipes bearing squamullose-punctate to densely strigose or hispidulous surfaces, and the unusual presence of hymenial cystidia that are narrowly clavate and mucronate-digitate at the apex. Tapinella atrotomentosa and T. panuoides are the only other species of the genus for which DNA sequences have been deposited, and are readily separated by the absence of hymenial cystidia. Paxillus amazonicus also possesses hymenial cystidia and thus might belong to genus Tapinella , but it differs in its habit (growing on soil), its slender basidioma, and the presence of clavate to narrowly clavate, obtusely mucronate-digitate at apex.