Abstract
Phillipsia hydei is introduced and illustrated as a new species from Thailand. This species is characterized by its sessile reddish apothecia, reddish hymenium, paraphyses with red contents and gelatinous sheath surrounded ascospores. Another species, Phillipsia carnicolor, is also recorded and described. Detailed macro- and microscopic characters are described and illustrated in photographic plates. Morphology and molecular analysis of the internal transcribed spacer (ITS) regions and the large subunit rRNA (LSU) regions sequences clearly distinguishes P. hydei as a distinct species in the genus Phillipsia.