Obligate Synonyme: Omphalia fibula (Bull.) P. Kumm., Der Führer in die Pilzkunde: 106 (1871) [MB213096] Mycena fibula (Bull.) Kühner, Encyclopédie Mycologique 10: 607 (1938) [MB252145] Marasmiellus fibula (Bull.) Singer, Sydowia 2 (1-6): 32 (1948) [MB287904] Gerronema fibula (Bull.) Singer, Publicações do Instituto de Micologia da Universidade do Recife 304: 13 (1961) [MB314437] Hemimycena fibula (Bull.) Singer, Annales Mycologici 41: 123 (1943) [MB331860] Omphalina fibula (Fr.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 46 (1886) [MB438769] Omphalopsis fibula (Bull.) Murrill, North American Flora 9 (5): 314 (1916) [MB503115] Hygrocybe fibula (Bull.) Fayod, Annales des Sciences Naturelles Botanique ser. 7, 9: 309 (1889) [MB366349] Micromphale fibula (Bull.) Gray, A natural arrangement of British plants 1: 623 (1821) [MB535201]