kingdom: Fungi >
phylum: Ascomycota >
class: Lecanoromycetes >
order: Lecanorales >
family: Tephromelataceae >
genus: Violella >
[1]
(1879). Scott. Natural. 5: 16.
[2]
(1911). Bull. Acad. Intern. Géogr. Bot. 21: 187.
[3]
(2011). In Spribille, Goffinet, Klug, Muggia, Obermayer & Mayrhofer, Lichenologist 43(5): 461.
[4]
(1926). Cat. Lich. Univers. 4: 3 (’1927′).
[5]
(1979). Lichenologist 11(2): 158.