Collybiopsis himalayensis sp. nov. (Omphalotaceae), a new white- spored agaric from the Indian Himalaya

A new species, Collybiopsis himalayensis, from the Uttarakhand Himalaya, India, is described based on micro-morphological and molecular phylogenetic analyses. This species is characterized by its convex to campanulate pileus with a slight umbo, margins uplifted, minutely pruniose surface, pale brown, sub-decurrent lamellae, sub-ellipsoidalbasidiospores, large basidia (36-51.5 × 6.6-7.9 µm), and presence of pleurocystidia and large hyphae like ileocystidia and cheilocystidia. Phylogenetic analyses of nrITS sequences confirm its categorization as a new taxon of Collybiopsis.