Basionym Name:Panaeolus campanulatus * pusillus Sacc., Atti Mem. R. Accad. Sci., Lett., Arti, Padova 33: 118 (1917)
Homotypic synonyms:Panaeolus pusillus (Sacc.) Sacc. & Trotter, Syll. fung. (Abellini) 23: 324 (1925)