Basionym Name:Agaricus protractus Fr., Epicr. syst. mycol. (Upsaliae): 97 (1838)
Homotypic synonyms:Collybia protracta (Fr.) Gillet, Hyménomycètes (Alençon): 311 (1876)Tephrocybe protracta (Fr.) Raithelh., Metrodiana 8(2-3): 52 (1979)Tephrocybe protracta (Fr.) Raithelh., Metrodiana 1(1): 4 (1970)