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Porpidia hypostictica is described as a new species; it has a white to grey-white thallus with yellow, oxidized patches near the margin, and contains hypostictic acid as the only major compound. A phylogenetic analysis is provided which is based on ITS sequences using ML and Bayesian analyses. The phylogeny supported the separation of the new species from other species. A key to all known Chinese Porpidia species is provided.
Pertusaria yunnana G. L. Zhou & Lu L. Zhang from south-western China is described as new to science. This corticolous species is characterized by the white pruinose disciform apothecia, asci with 8 ascospores, and the presence of atranorin in addition to fumarprotocetraric acid. Related lichen taxa are discussed and a key to 21 corticolous species of Pertusaria with disciform apothecia and 8-spored asci is also provided.
Lecanora subjaponica L. Lü & H. Y. Wang from western China is described as new to science. It is the only known Lecanora species having (16–)32-spored asci and it is otherwise characterized by an epruinose, shiny brown apothecial disc, epihymenium lacking granules and the presence of zeorin in addition to atranorin. A worldwide key to the multispored species of Lecanora is also given.
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