Name requested: Naucoria pygmaeaMycology and Phytopathology 8 (4): 293, 297. Persoonia 13 (1): 12.
Homotypic synonym: Agaricus pygmaeusPersoonia 6 (1): 132.
Homotypic synonym: Psathyrella pygmaeaPersoonia 6 (1): 132. 6 (3): 305. 14 (3): 290. Sydowia 15 (1-6): 67.