Basionym: Fomes robustus P. Karst., Bidrag till Kännedom av Finlands Natur och Folk 48: 467 (1889) [MB#169415] Obligate synonyms: - Phellinus robustus (P. Karst.) Bourdot & Galzin, Bull. Soc. Mycol. France 41 (1-2): 188 (1925) [MB#142852] - Polyporus robustus (P. Karst.) S. Lundell & Nannf., Fungi Exsiccati Suecici Fasc. 5-6: no. 245 (1936) [MB#254418] - Scindalma robustum (P. Karst.) Kuntze, Revisio generum plantarum 3 (3): 519 (1898) [MB#471514] - Ochroporus robustus (P. Karst.) J. Schröt. ex Donk, Mededelingen van het botanisch Museum en Herbarium van de Rijksuniversiteit Utrecht 9: 248 (1933) [MB#254417] Taxonomic synonyms: - Fomes igniarius var. robustus Fr. & Cooke (?) [MB#493963] - Pyropolyporus bakeri Murrill, North American Flora 9 (2): 104 (1908) [MB#199545] - Phellinus bakeri (Murrill) A. Ames, Annales Mycologici 11 (3): 246 (1913) [MB#470445] - Fomes bakeri (Murrill) Sacc. & Trotter, Sylloge Fungorum 21: 293 (1912) [MB#157753] - Fomitiporia bakeri (Murrill) J. Vlasak & J. Kout, Mycological Progress 10 (4): 450 (2010) [MB#518865] - Polyporus bakeri (Murrill) Bres. (?) [MB#180326] - Polyporus buxi Branke, Izv. vyssh. ucheb. Zaved.: 473 (1894) [MB#472461] - Pyropolyporus crustosus Murrill, Bulletin of the Torrey Botanical Club 30 (2): 113 (1903) [MB#173699] - Fomes crustosus (Murrill) Sacc. & D. Sacc., Sylloge Fungorum 17: 119 (1905) [MB#233158] - Pyropolyporus haematoxyli Murrill, Bulletin of the Torrey Botanical Club 30 (2): 117 (1903) [MB#173546] - Fomes haematoxyli (Murrill) Sacc. & D. Sacc., Sylloge Fungorum 17: 118 (1905) [MB#196204] - Fomes squarrosus Lloyd, Mycol. Writ. 4 (Letter 53): 10 (1914) [MB#469247] - Fomes rhaponticus Lloyd, Synopsis of the genus Fomes (7): 258 (1915) [MB#175728] - Pyropolyporus abramsianus Murrill, Western Polypores (5): 26 (1915) [MB#199642] - Fomes abramsianus (Murrill) Sacc. & Trotter, Sylloge Fungorum 23: 397 (1925) [MB#469188] - Fomes abramsianus (Murrill) Murrill, Mycologia 7 (4): 215 (1915) [MB#545861] - Fomes ungulatus Lázaro Ibiza, Revista de la Real Academia de Ciencias Exactas Fisicas y Naturales Madri 14: 663 (1916) [MB#188193] - Ungularia tuberosa Lázaro Ibiza, Revista de la Real Academia de Ciencias Exactas Fisicas y Naturales Madri 14: 672 (1916) [MB#177564] - Fomes tuberosus (Lázaro Ibiza) Sacc. & Trotter, Sylloge Fungorum 23: 388 (1925) [MB#191077] - Fomes yasudai Lloyd (1915) [MB#241781] - Polyporus aestriplex E.H.L. Krause, Basidiomycetium Rostockienses, Suppl. 3: 122 (1931) [MB#470797] - Phellinus aestriplex (E.H.L. Krause) E.H.L. Krause, Mecklenburgs Basidiomyceten: 23 (1934) [MB#470443] - Agaricus aestriplex (E.H.L. Krause) E.H.L. Krause, Basidiomycetum Rostochiensium, Suppl. 4: 142 (1932) [MB#467979] - Fomes yasudae Lloyd, Synopsis of the genus Fomes (7): 272 (1915) [MB#535121]