Synonymy:
Lepraria usnica Sipman, Biblioth. Lichenol. 86: 179 (2003)
Nelsenium usnicum (Sipman) Lendemer & B.P. Hodk., Mycologia 105(4): 1013 (2013)

Position in classification:
Septotrapelia, Byssolomataceae, Lecanorales, Lecanoromycetidae, Lecanoromycetes, Ascomycota, Fungi

Note:
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