Arthonia orbicularis Bat. & J.L. Bezerra

URM 21641. Place of collection: Brazil; Amazonas; Manaus-Caracaraí Highroad, Km 13. Date of collection: 11 April 1961. Associated organisms: Couepia rufa; Microxyphiomyces capitulatus; Porina epiphylla; Porina octomera; Porina phyllogena; Tegoa couepiae; Trentepohlia sp. Collector: Peres, G.E.P..