Basionym: Hydnum spathulatum Schrad., Spicilegium Florae Germanicae: 178, t. 4:3 (1794) [MB#229523] Obligate synonyms: - Kneiffiella spathulata (Schrad.) Jülich & Stalpers, Verhandelingen Koninklijke Nederlandse Akademie van Wetenschappen Afdeling Natuurkunde 74: 132 (1980) [MB#111589] - Grandinia spathulata (Schrad.) Jülich, International Journal of Mycology and Lichenology 1 (1): 36 (1982) [MB#109801] - Hyphodontia spathulata (Schrad.) Parmasto, Conspectus Systematis Corticiacearum: 123 (1968) [MB#315555] - Sistotrema spathulatum (Schrad.) Pers., Synopsis methodica fungorum: 553 (1801) [MB#204106] - Irpex spathulatus (Schrad.) Fr., Elenchus Fungorum 1: 146 (1828) [MB#155517] - Radulum spathulatum (Schrad.) Bres., Annales Mycologici 1 (1): 89 (1903) [MB#169920] - Odontia spathulata (Schrad.) Litsch., Österreichische Botanische Zeitschrift 88 (2): 125 (1939) [MB#278498] Taxonomic synonyms: - Hydnum pithyophilum Berk. & M.A. Curtis, Hooker's Journal of Botany and Kew Garden Miscellany 1: 235 (1849) [MB#217157] - Odontia pithyophila (Berk. & M.A. Curtis) Rick, Egatea: 130 (1933) [MB#254001] - Irpex ambiguus Peck, Annual Report on the New York State Museum of Natural History 40: 55 (1887) [MB#256616] - Xylodon ambiguus (Peck) Kuntze, Revisio generum plantarum 3 (3): 541 (1898) [MB#440779] - Hyphodontia chinensis C.C. Chen & Sheng H. Wu, Mycological Progress 16 (5): 554 (2017) [MB#818691] - Xylodon chinensis (C.C. Chen & Sheng H. Wu) C.C. Chen & Sheng H. Wu, Mycoscience 59 (5): 349 (2018) [MB#823430] - Hyphodontia bubalina Min Wang, Yuan Y. Chen & B.K. Cui, Phytotaxa 309 (1): 50 (2017) [MB#819425] - Xylodon bubalinus (Min Wang, Yuan Y. Chen & B.K. Cui) C.C. Chen & Sheng H. Wu, Mycoscience 59 (5): 349 (2018) [MB#823432]