Three New Species and Nine New Records in the GenusArthoniafrom South Korea.
Arthonia coreana,Arthonia superpallens, andArthonia zelkovaeare new species from South Korea. All new species are in the Euarthonia tribe, based on the key characteristics of colorless hypothecium and multi-cellular spores.A. coreanahas a dull brownish hypophloedal thallus without bleaching and rounded or curved big apothecia in comparison with those ofArthonia punctiformis.A. coreanaconsistently exhibits 4-septate ascospores, which is a distinctive characteristic that distinguishes it from otherArthoniaspecies.A. superpallenshas a white-greenish thallus, pale yellowish apothecia, and a trentepohlioid alga. However,A. superpallenshas no distinct prothallus, adnate, and convex apothecia, no pycnidia, and is UV-, in contrast with related species in theArthonia antillarumgroup.A. zelkovaehas a white, epiphloedal thallus, brownish-black epruinose apothecia covered with a whitish bark layer, and smaller ascospores in comparison with those ofA. punctiformis.A. zelkovaeconsists of a chlorococcoid alga, which differs from relatedArthoniaspecies such asA. punctiformis,Arthonia pinastri, andArthonia glaucella. AlthoughA. zelkovaeis similar toArthonia dispersain its white-colored thallus, blackish apothecia, and the presence of a chlorococcoid photobiont,A. zelkovaediffers from the latter in having larger-sized 3-septate ascospores.Arthonia cinnabarinaf.marginata,A. glaucella,Arthonia ilicinella,Arthonia lapidicola,Arthonia leioplacella,Arthonia pertabescens,A. pinastri,Arthonia spadicea, andArthonia stellarisare newly described in Korea. The diagnostic characteristics of these species are discussed and presented. An artificial key is provided to facilitate identification ofArthoniaspecies from Northeast Asia.
Korean Lichen Research Institute, Sunchon National University, Suncheon 57922, Korea.
Beeyoung Gun
BG
Lee
Korean Lichen Research Institute, Sunchon National University, Suncheon 57922, Korea.
Jae-Seoun
JS
Hur
Arthonia; Corticolous; New species; South Korea