Loekoesia lichens have bright white, rounded soralia, which produce bluish to whitish powdery propagules (soredia) and are arranged in irregular groups on the thallus.

The type species, Loekoesia austrocoreana, was shown with molecular phylogenetics to form a clade with Jasonhuria, another genus in the subfamily Caloplacoideae that was also circumscribed in the same publication.

[3][4] The genus name honours the Hungarian lichenologist László Sándor Lőkös for his contributions to the body of knowledge about lichens in North and South Korea.

[2] Genus Loekoesia has lichens with a crustose thallus, which can be either whole (i.e., undivided, or entire) or broken into areolate (patch-like) segments.

[2] The apothecia (fruiting bodies) of Loekoesia lichens are black and biatorine in form, featuring a true exciple that is paraplectenchymatous (comprising fungal hyphae that are oriented in all directions) with a well-developed structural matrix.