Everniopsis
Everniopsis is a fungal genus in the family Parmeliaceae. It consists of a single species, the bark-dwelling lichen Everniopsis trulla, which occurs in Africa and South America. Systematics. "Everniopsis trulla" was first formally described by Erik Acharius in 1803 with the name "Parmelia trulla". The type material, collected in Peru, is kept at the herbarium of the Department of Botany at the Swedish Museum of Natural History. William Nylander transferred the taxon to the new genus "Everniopsis" in 1860. Ernst Stizenberger thought that "Everniopsis " should be a section of genus "Parmelia", and proposed this classification in an 1862  publication. The genus "Hendrickxia", circumscribed by Belgian botanist Paul Auguste Duvigneaud in 1942 with "Hendrickxia pseudoreticulata" as the type species, has been folded into synonymy with "Everniopsis". Molecular phylogenetic analysis indicates that "Everniopsis" is in the Psiloparmelioid clade of the family Parmeliaceae, along with the genus "Psiloparmelia". Description. "Evernipiopsis" has a thallus attached by a holdfast to its substrate. The lobes comprising the thallus are linearly elongated, split into two at the ends, and longitudinally grooved (canaliculate). The thallus lacks both rhizines (root-like structures) and cilia (short, eyelash-like hair). Its conidia (asexual spores) are rod-shaped with swellings  at each end (bifusiform). It produces ascospores that are ellipsoid in shape, measuring 12–16 by 7–10 μm. The superficially similar genus "Everniastrum", in contrast, does not have a holdfast, it does have both rhizines and cilia, and its conidia are cylindrical. Secondary chemicals that have been identified from "Everniopsis trulla" include usnic acid, atranorin, and ethyl haematommate. Habitat and distribution. "Everniopsis trulla" is a corticolous lichen and occurs in Africa and South America. On the latter continent, the lichen occurs at high elevations from Mexico south to northern Chile.