Abstract
Lecanoraparasymmicta Lee & Hur and Protoparmeliopsiscrystalliniformis Lee & Hur are described as new lichen species to science from the forested wetlands in southern South Korea. Molecular analyses employing internal transcribed spacer (ITS) and mitochondrial small subunit (mtSSU) sequences strongly support the two lecanoroid species to be distinct in their genera. Lecanoraparasymmicta is included in the Lecanorasymmicta group. It is morphologically distinguished from Lecanorasymmicta (Ach.) Ach., its most similar species, by areolate-rimose thallus, blackish hypothallus, larger apothecia, absence of thalline excipulum from the beginning, narrower paraphyses, larger ascospores, smaller pycnoconidia, and the presence of placodiolic acid. The second new species Protoparmeliopsiscrystalliniformis is included in a clade with Protoparmeliopsisbipruinosa (Fink) S.Y. Kondr. and P.nashii (B.D. Ryan) S.Y. Kondr., differs from Protoparmeliopsisertzii Bungartz & Elix, its most morphologically similar species, by whitish thallus, flat to concave and paler disc, longer ascospores, thallus K+ yellow reaction, presence of atranorin and rhizocarpic acid, and the substrate preference to sandstone or basalt. A key is provided to assist in the identification of Protoparmeliopsis species in Korea.