Opeltiella fibrosoides is a species of lichen-forming fungus in the family Candelariaceae.

[2] It is known to occur only in a single location in Peru, where lichen thrives in a high-altitude environment, specifically on shrubs and cacti in an open pasture land.

It was formally described as a new species by Swedish lichenologists Martin Westberg and Patrik Frödén in 2007, first as a member of the genus Candelaria.

Although it bears a striking resemblance to C. fibrosa on the surface, it is differentiated by its eight-spored asci and a thallus featuring an ecorticate lower surface.

[3] In 2020, Sergey Kondratyuk transferred the taxon to the newly circumscribed genus Opeltiella, following molecular phylogenetic-based analysis of the family Candelariaceae.