Lendemer, James C.; Lumbsch, H. Thorsten (2008). "Protoparmelia capitata sp. nov., and P. isidiata Diederich, Aptroot & Sérus., two species of Protoparmelia ( Lecanorales, Ascomycota) from south-eastern North America". The Lichenologist. 40 (4): 329–336. doi:10.1017/s0024282908007810. S2CID83899471.
Divakar, Pradeep K.; Crespo, Ana; Kraichak, Ekaphan; Leavitt, Steven D.; Singh, Garima; Schmitt, Imke; Lumbsch, H. Thorsten (2017). "Using a temporal phylogenetic method to harmonize family- and genus-level classification in the largest clade of lichen-forming fungi". Fungal Diversity. 84 (1): 101–117. doi:10.1007/s13225-017-0379-z. S2CID40674310.
Lendemer, James C.; Lumbsch, H. Thorsten (2008). "Protoparmelia capitata sp. nov., and P. isidiata Diederich, Aptroot & Sérus., two species of Protoparmelia ( Lecanorales, Ascomycota) from south-eastern North America". The Lichenologist. 40 (4): 329–336. doi:10.1017/s0024282908007810. S2CID83899471.
Divakar, Pradeep K.; Crespo, Ana; Kraichak, Ekaphan; Leavitt, Steven D.; Singh, Garima; Schmitt, Imke; Lumbsch, H. Thorsten (2017). "Using a temporal phylogenetic method to harmonize family- and genus-level classification in the largest clade of lichen-forming fungi". Fungal Diversity. 84 (1): 101–117. doi:10.1007/s13225-017-0379-z. S2CID40674310.