Buellia subfrigida sp. nov. (Lichens, Buelliaceae) from Lutzow-Holm Bay area and Prince Olav Coast, East Antarctica- The asexual sorediate species forming a species pair with B. frigida Darb.

Abstract

Buellia subfrigida growing on rocks in seasonally inundated habitats at the Lutzow-Holm Bay area and the Prince Olav Coast of East Antarctica is described as new. Except for the presence of sorediate thallus, it is morphologically and chemically similar to B. frigida which is widely distributed in the continental Antarctic. Both species may form a "species pair"; B. subfrigida seems to be derived from sexual B. frigida by the acquisition of "asexual propagules" soredia. Descriptions including taxonomic and chemical data are provided.