Basionym:
Polyporus amorphus Fr., Observationes mycologicae 1: 125 (1815) [MB#167948]
Obligate synonyms:
- Gloeoporus amorphus (Fr.) Killerm., Die Natürlichen Pflanzenfamilien 6: 202 (1928) [MB#250655]
- Bjerkandera amorpha (Fr.) P. Karst., Meddelanden af Societas pro Fauna et Flora Fennica 5: 38 (1879) [MB#100791]
- Polystictus amorphus (Fr.) Gillot & Lucand, Cat. Champ. sup. Saône-et-Loire (1890) [MB#472925]
- Polyporus aureolus Pers., Mycologia Europaea 2: 60 (1825) [MB#193806]
- Leptoporus amorphus (Fr.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 178 (1886) [MB#453732]
- Polystictoides amorphus (Fr.) Lázaro Ibiza, Revista de la Real Academia de Ciencias Exactas Fisicas y Naturales Madri 14: 757 (1916) [MB#470952]
- Tyromyces amorphus (Fr.) Murrill, Mycologia 10 (3): 109 (1918) [MB#449540]
Taxonomic synonyms:
- Tyromyces pini-glabrae Murrill, Bulletin of the Torrey Botanical Club 67 (1): 65 (1940) [MB#291718]
- Polyporus pini-glabrae (Murrill) Murrill, Bulletin of the Torrey Botanical Club 67 (1): 66 (1940) [MB#289834]
- Polyporus horakii Velen., Ceske Houby 4-5: 651 (1922) [MB#267327]
- Polyporus pertenuis Velen., Ceske Houby 4-5: 651 (1922) [MB#274050]
- Coriolus subabietinus Murrill, Bulletin of the Torrey Botanical Club 65: 658 (1938) [MB#279082]
- Polystictus subabietinus (Murrill) Murrill, Bulletin of the Torrey Botanical Club 65: 661 (1938) [MB#279083]
- Polyporus armeniacus Berk., The English Flora, Fungi 5 (2): 147 (1836) [MB#155380]
- Trametes armeniaca (Berk.) Ryvarden, Mycotaxon 20 (2): 332 (1984) [MB#107336]
- Skeletocutis amorpha f. armeniaca (Berk.) Domanski, Orlos & Skirg., Flora Polska Grzyby (Mycota) 3: 154 (1967) [MB#348860]
- Coriolus sublilacinus Murrill, North American Flora 9 (1): 25 (1907) [MB#208216]
- Polystictus sublilacinus (Murrill) Sacc. & Trotter, Sylloge Fungorum 21: 317 (1912) [MB#149885]
- Polyporus roseoporis Rostk., Deutschlands Flora, Abt. III. Die Pilze Deutschlands 27/28: 23 (1848) [MB#235108]
- Polyporus alboaurantius Veull., Revue Mycol. (Toulouse): 19 (1883) [MB#158183]
- Bjerkandera mollusca P. Karst., Revue Mycologique Toulouse 9: 9 (1887) [MB#140188]
- Polyporus molluscus (P. Karst.) Sacc., Sylloge Fungorum 6: 114 (1888) [MB#198753]
- Skeletocutis amorpha f. mollusca (P. Karst.) Domanski, Orlos & Skirg., Flora Polska Grzyby (Mycota) 3: 154 (1967) [MB#348861]