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