Basionym Name:Helotium affinissimum Peck, Ann. Rep. N.Y. St. Mus. nat. Hist. 33: 32 (1883)
Homotypic synonyms:Hymenoscyphus affinissimus (Peck) Kuntze, Revis. gen. pl. (Leipzig) 3(3): 485 (1898)Phialea affinissima (Peck) Sacc., Syll. fung. (Abellini) 8: 272 (1889)