It consists of a single species,[3] the bark-dwelling lichen Everniopsis trulla, which occurs in Africa and South America.

[4] The type material, collected in Peru, is kept at the herbarium of the Department of Botany at the Swedish Museum of Natural History.

[6] Ernst Stizenberger thought that Everniopsis should be a section of genus Parmelia, and proposed this classification in an 1862 publication.

[1] Molecular phylogenetic analysis indicates that Everniopsis is in the Psiloparmelioid clade of the family Parmeliaceae, along with the genus Psiloparmelia.

[11] Secondary chemicals that have been identified from Everniopsis trulla include usnic acid, atranorin, and ethyl haematommate.