[945] Abrothallus has been included in the lichen genus Buellia.

[946] Tulasne 1852.

[947] Lindsay 1856.

[948] Crombie 1894.

[949] Kotte 1910.

[950] Zopf 1896.

[951] Zopf 1898, p. 249.

[952] Tobler 1911².

[953] [See p. 276.]

[954] Elenkin 1901².