Opegrapha reinkellae is a species of lichenicolous (lichen-dwelling) fungus in the family Opegraphaceae.

The holotype specimen was collected in Peru, possibly from the central region, by A. Winterfeld in the second half of the 19th century.

The fungus produces cylindrical-clavate asci containing eight hyaline, oblong-fusiform ascospores that are typically eight-celled.

Notably, O. reinkellae has a parasiticrelationship with its host, deeply penetrating the medulla with suctorial hyphae.

All known collections of O. reinkellae date from the 19th century, and with its host now considered endangered, the parasite may potentially be extinct.