Pluteus sinensis , a new species of Pluteus sect. Celluloderma from China, is described and illustrated based on morphological and molecular data. It is mainly characterized by terrestrial habitat, very small to small basidiomata, slightly umbonate at disk, a cracking pileus surface, broadly ellipsoid basidiospores measuring 5.5–6.5 × 4.5–5.5 µm, fusoid pleurocystidia, an epithelioid hymeniderm pileipellis with a predominantly...