Kuettlingeria furax

Kuettlingeria furax is a species of lichenicolous (lichen-dwelling) crustose lichen in the family Teloschistaceae. It was first formally described as a new species in 1983 by José María Egea Fernández and Xavier Llimona; they classified it in the genus Caloplaca. The type specimen of this lichen was discovered in the eastern part of the Sierra Morena mountains in Albacete, Spain. It was found growing parasitically on other lichens in the genus Aspicilia, which are found on silica-rich surfaces.

Kuettlingeria furax appears as small, circular patches that are a deep brownish-grey colour. It has a somewhat lobed edge, and its reproductive structures (apothecia), quickly lose their. The authors compared it to Caloplaca conglomerata, but noted the distinctness of its spores, which are broader and have a bulged middle. The taxon was transferred to the genus Kuettlingeria in 2020; it has also been proposed for inclusion in the genus Pisutiella.