Abstract
AbstractAs part of a phylogenetic and taxonomic revision of the lichenized genusStictain Colombia, six new species with apotheciate thalli but lacking vegetative propagules are described:Sticta atroandensisMoncada & Lücking sp. nov.,S. breviorMoncada & Lücking sp. nov.,S. lumbschianaMoncada & Lücking sp. nov.,S. macrocyphellataMoncada & Coca sp. nov.,S. parahumboldtiiMoncada & Lücking sp. nov., andS. pseudohumboldtiiMoncada & Lücking sp. nov. The last two are related toS. humboldtiibut phylogenetically distinct and differ in details of cyphellae morphology and spot reactions.Sticta atroandensisis similar toS. andensisbut has a dark lower tomentum, whereasS. breviorbelongs in theS. kunthiigroup, being characterized by mainly laminal apothecia with tomentose margins and a rather stout thallus. BothS. lumbschianaandS. macrocyphellataform part of theS. dilatatagroup and can be characterized by their lobe surface structure and cyphellae anatomy. Keys to species of theS. dilatataandS. humboldtiigroups are presented.
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