Olegblumia

Olegblumia is a monotypic fungal genus in the family Teloschistaceae. It contains the single species Olegblumia demissa, a saxicolous (rock-dwelling) crustose lichen.

Taxonomy
Genus Olegblumia was first circumscribed in 2015 by lichenologists Sergey Kondratyuk, Laszlo Lőkös, and Jae-Seoun Hur. However, the name was not validly published according to the rules of botanical nomenclature as set out in the International Code of Nomenclature for algae, fungi, and plants. The name was validly published by the same authors in 2020. The genus name honours Ukrainian lichenologist Oleg Blum. In molecular phylogenetic analysis, Olegblumia is a sister group to the genus Usnochroma.

Description
Genus Olegblumia is characterized by a thallus that typically forms a distinct, rosette-like shape. The colour of the upper surface of the lichen ranges from brown to brownish-grey. Its are flat to slightly convex and are quite narrow. Soralia, the reproductive structures where are produced, are found on the  surface and are noteworthy for their convex shape and highly uplifted soredious mass, which bears a brownish hue. The soredia themselves are irregularly rounded with a colouration that varies from brown to brownish-green. Chemically, Olegblumia contains the lichen products vicanicin and caloploicin.

Habitat and distribution
Found in Europe and North America, Olegblumia demissa grows on siliceous rocks, typically on vertical and inclined surfaces. Aspicilia contorta is a frequent lichen associate.