Basionym Name:Polyporus attenuatus Peck, Ann. Rep. N.Y. St. Mus. nat. Hist. 26: 70 (1874)
Homotypic synonyms:Poria attenuata (Peck) Sacc., in Peck, Ann. Rep. N.Y. St. Mus. nat. Hist. 26: 70 (1874)Poria attenuata var. attenuata (Peck) Sacc., in Peck, Ann. Rep. N.Y. St. Mus. nat. Hist. 26: 70 (1874)