The new species Gyalectidium aurelii is described from leaves of Meliaceae collected in Chapada dos Guimarães, in the State of Mato Grosso, Brazil. The new taxon is characterized by very broad, marginal hyphophores with scales that project horizontally from the leaf margin and are closely appressed to the substrate. G. aurelii is distinguished from similar species, such as G. fantasticum and G. paolae, by its hyphophores being incurved (following the thallus outline) and having an entire margin, and further by its irregularly verrucose rather than areolate thallus. The genus Gyalectidium now comprises 37 species.
new species; Chapada dos Guimaraes; Meliaceae
