Orestovia is a lower[2]-middle Devonian[1] thallophyte known from fossilised cuticle, cutinite.

Described as an enigmatic taxa, Orestovia has variously been categorised as a brown algae, an algae of unknown affinities, a thalloid non-vascular plant, and an early vascular plant, or even the result of the alternation of generations of some other group.

[3] Most specimens are preserved as hollow, cuticular sheaths that often exhibit an epidermis-like cellular pattern.

[2] A reconstruction looks similar to the extant fern Pilularia globulifera (Marsileaceae) in the water with a creeping rhizome and naked, upright axes.

[3] Orestovia remains have been documented from the following locations, In Russia: Pavlovsk, Voronezh Oblast,[2] Graham Bell Island, Arctic Ocean[5] and the Kuznetsk Basin, Siberia.