Name requested: Polyporus spumeusMycologia 9 (3): 133, 163. 10 (4): 214. 35 (6): 663. 53 (5): 483. Mycotaxon 21: 332. Sydowia 17 (1-6): 215.
Heterotypic synonym: Spongipellis occidentalisMycotaxon 23: 191.
Heterotypic synonym: Spongipellis spumeusMycologia 12 (1): 8. 36 (1): 66. Mycology and Phytopathology [as Микология и Фитопатология] 2 (1): 66. 8 (6): 484, 488, 489. Mycotaxon 23: 191. 33: 276. 38: 101. 74 (1): 155, 157. 82: 298, 303, 306. Persoonia 5 (1): 3. 11 (4): 424. Sydowia 16 (1-6): 201.