Basionym: Agaricus semiovatus Sowerby, Coloured Figures of English Fungi 2: 56, t. 131 (1799) [MB#181339] Obligate synonyms: - Anellaria semiovata (Sowerby) A. Pearson & Dennis, Transactions of the British Mycological Society 31 (3-4): 185 (1948) [MB#284166] - Coprinus semiovatus (Sowerby) Gray, A natural arrangement of British plants 1: 632 (1821) [MB#492181] Taxonomic synonyms: - Panaeolus semiovatus var. semiovatus (?) [MB#439552] - Agaricus separatus L., Species Plantarum: 1175 (1753) [MB#184188] - Panaeolus separatus (L.) Quél., Bulletin de la Société Botanique de France 23: 328, XLIV (1877) [MB#457042] - Anellaria separata (L.) P. Karst., Bidrag till Kännedom av Finlands Natur och Folk 32: 517 (1879) [MB#203263] - Stropharia separata (L.) J.E. Lange, Dansk botanisk Arkiv 4 (4): 34 (1923) [MB#356629] - Coprinarius separatus (L.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 118 (1886) [MB#504659] - Pholiota separata (L.) P. Kumm., Der Führer in die Pilzkunde: 84 (1871) [MB#507959] - Amanita separata (L.) Delarbre, Flore d’Auvergne 2: 868 (1836) [MB#636410]