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As part of a phylogenetic and taxonomic revision of the lichenized genus Sticta in Colombia, six new species with apotheciate thalli but lacking vegetative propagules are described: Sticta atroandensis Moncada & Lücking sp. nov., S. brevior Moncada & Lücking sp. nov., S. lumbschiana Moncada & Lücking sp. nov., S. macrocyphellata Moncada & Coca sp. nov., S. parahumboldtii Moncada & Lücking sp. nov., and S. pseudohumboldtii Moncada & Lücking sp. nov. The last two are related to S. humboldtii but phylogenetically distinct and differ in details of cyphellae morphology and spot reactions. Sticta atroandensis is similar to S. andensis but has a dark lower tomentum, whereas S. brevior belongs in the S. kunthii group, being characterized by mainly laminal apothecia with tomentose margins and a rather stout thallus. Both S. lumbschiana and S. macrocyphellata form part of the S. dilatata group and can be characterized by their lobe surface structure and cyphellae anatomy. Keys to species of the S. dilatata and S. humboldtii groups are presented. [ABSTRACT FROM PUBLISHER]

Three new species of Chapsa in the family Graphidaceae are described from tropical Asia. Chapsa mastersonii Rivas Plata, Lumbsch & Lücking from the Philippines is characterized by large apothecia with thickly white-pruinose discs, large, muriform, non-amyloid ascospores, and the stictic acid chemosyndrome. Chapsa wijeyaratniana Weerakon, Lumbsch & Lücking from Sri Lanka has apothecia similar to the preceding species but forms an ecorticate thallus with maculiform to capitate soralia, has small, submuriform ascospores, and lacks secondary substances. Chapsa wolseleyana Weerakon, Lumbsch & Lücking forms apothecia with red to pinkish or purplish red discs and large, muriform ascospores becoming pale brown. [ABSTRACT FROM AUTHOR]