© The Korean Society of Mycology 149 Notes on the Existence of Leucodecton desquamescens (Thelotremoid Graphi- daceae) in South Korea

This study describes a new record of a thelotremoid lichen (Leucodecton desquamescens) from South Korea. The taxon is characterized by thick, bulging thallus with many calcium oxalate crystal inclusions; an immersed, round to irregular asco-mata with free exciple, ellipsoid to ± roundish submuriform, brown ascospores, and lack of secondary metabolites. A detailed taxonomic description and comments are presented for this taxon. The lichen genus Leucodecton is reported for the first time in South Korea