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- Hodkinson, B.P. & Lendemer, J.C. 2011. The orders of Ostropomycetidae (Lecanoromycetes, Ascomycota): Recognition of Sarrameanales and Trapeliales with a request to retain Pertusariales over Agyriales. Phytologia 93(3): 407–412. BHL Phytologia (PDF)