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 Dicymbe corymbosa. The type was collected in the Potaro-Siparuni region, in the Pakaraima Mountains, at an elevation of 710–. 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.