Basionym Name:Placidium pseudorufescens Breuss, in Nash, Ryan, Gries & Bungartz (eds), Lichen Flora of the Greater Sonoran Desert Region (Tempe) 1: 391 (2002)
Homotypic synonyms:Clavascidium pseudorufescens (Breuss) M. Prieto, in Prieto, Martínez, Aragón, Gueidan & Lutzoni, Am. J. Bot. 99(1): 28 (2012)