Pyxine tiinae (Caliciaceae, Ascomycota), a new lichen species from high elevation in Peru

Pyxine tiinae, a new foliose lichen species, is described from an alpine locality in Peru. The new species is character- ized by convex and radiating, grey lobes, a K– cortex and K– epihymenium, the presence of terpenes, and by comparatively long pycnoconidia. A phylogenetic analysis places P. tiinae as sibling to the genus Culbersonia, although the morphological characters do not fit with either this genus or with Pyxine as currently circumscribed.