Arthonia orbicularis Bat. & J.L. Bezerra

URM 21645. Place of collection: Brazil; Amazonas; Manaus-Caracaraí Highroad, Km 12. Date of collection: 14 April 1961. Associated organisms: Cephaleuros sp.; Couepia rufa; Dothiomyces couepiae; Microxyphiomyces capitulatus; Porina epiphylla; Porina octomera; Porina phyllogena; Tegoa couepiae. Collector: Peres, G.E.P..