Basionym:
Hydnum spathulatum Schrad., Spicilegium Florae Germanicae: 178, t. 4:3 (1794) [MB#229523]
Obligate synonyms:
- Kneiffiella spathulata (Schrad.) Jülich & Stalpers, Verh. Kon. Ned. Akad. Wetensch., Afd. Natuurk., Sect. 2 74: 132 (1980) [MB#111589]
- Grandinia spathulata (Schrad.) Jülich, Int. J. Mycol. Lichenol. 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., Ann. Mycol. 1 (1): 89 (1903) [MB#169920]
- Odontia spathulata (Schrad.) Litsch., Oesterr. Bot. Z. 88 (2): 125 (1939) [MB#278498]
Taxonomic synonyms:
- Hydnum pithyophilum Berk. & M.A. Curtis, Hooker's J. Bot. Kew Gard. Misc. 1: 235 (1849) [MB#217157]
- Odontia pithyophila (Berk. & M.A. Curtis) Rick, Egatea: 130 (1933) [MB#254001]
- Irpex ambiguus Peck, Rep. (Annual) New York State Mus. Nat. Hist. 40: 55 (1887) [MB#256616]
- Xylodon ambiguus (Peck) Kuntze, Revisio generum plantarum 3 (3): 541 (1898) [MB#440779]
- Hyphodontia chinensis C. Chih Chen & Sheng H. Wu, Mycol. Progr. 16 (5): 554 (2017) [MB#818691]
- Xylodon chinensis (C. Chih Chen & Sheng H. Wu) C. Chih 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. Chih Chen & Sheng H. Wu, Mycoscience 59 (5): 349 (2018) [MB#823432]