Marasmius celtibericus G. Moreno & Raitviir, a new species from Spain,
is described and illustrated. it is characterized by very small basid
iocarps with a smooth hymenophore, somewhat resembling Marasmius comel
ii Laessoe & Noordel. Microscopically, however, Marasmius celtibericus
must be ranged in sect. Hygrometrici on account of the pileipellis.