Himantormia

Himantormia is a genus of lichen-forming fungi in the family Parmeliaceae. It consists of two species found in the southernmost parts of South America and Antarctica. Both species are characterised by a paraplectenchymatous cortex composed of large, dark pigmented cells, a pachydermatous medulla, and the absence of lichenin in their cell walls. While morphologically similar in some aspects, the species can be distinguished by their lobe shapes, cortex cell sizes, medulla structure, and distinct secondary metabolite compositions, with H. deusta producing fumarprotocetraric acid as its major compound and H. lugubris containing alectorialic acid as its primary metabolite....read more on Wikipedia.