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Nolanea claviformis, or Entoloma claviforme, is a mushroom in the family Entolomataceae. Described as new to science in 2014, it is found in Guyana, where it fruits on humus under . The type was collected in the Potaro-Siparuni region, in the Pakaraima Mountains, at an elevation of 710–750 metres (2,330–2,460 ft). The specific epithet claviformis/claviforme (club-shaped) refers to the shape of its stipe. Although it was originally described under the genus name Nolanea, this is nowadays generally regarded as a sub-genus of Entoloma, and so the current name is Entoloma claviforme.