Synonymy:
Ascomyces alni Berk. & Broome, Ann. Mag. nat. Hist., Ser. 4 17: 144 (1876)

Taphrina alnitorqua Tul., Annls Sci. Nat., Bot., sér. 5 5: 130 (1866)
Exoascus alnitorquus (Tul.) Sadeb., Jahrb. wiss. anst. Hamburg 1: 115 (1883)
Ascomyces trientalis var. alnitorqua (Tul.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 341 (1886)
Ascomyces alnitorquus (Tul.) Massee, Brit. Fung.-Fl. (London) 4: 16 (1895)

Exoascus alnitorquus f. alni-incanae J.G. Kühn, in Rabenhorst, Fungi europ. exsicc.: no. 1616 (1873)
Taphrina alni-incanae (J.G. Kühn) Magnus [as 'alni incanae'], Hedwigia 29: 25 (1890)
Exoascus alni-incanae (J.G. Kühn) Sacc., Syll. Fung. (Abellini) 10: 69 (1892)

Exoascus amentorum Sadeb., Botan. Zbl. 36: 349 (1888)
Taphrina amentorum (Sadeb.) Rostr., Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn 52: 261 (1891) [1890]

Exoascus alni-incanae f. fructicola Vestergr., Bot. Notiser: 32 (1900)

Position in classification:
Taphrina, Taphrinaceae, Taphrinales, Taphrinomycetidae, Taphrinomycetes, Ascomycota, Fungi

Note:
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