Onega stepanovi placed in phylum Proarticulata, as the segments in recently discovered, exceptionally well-preserved fossils display the glide, or "staggered", symmetry characteristic of the majority of proarticulatans. Imprints of "Onega stepanovi" have been found in the Verkhovka and Zimnie Gory Formations of the Ediacaran (Vendian) rocks of the Arkhangelsk Region, Russia. All the fossil specimens are negative imprints on the bases of fine-grained sandstone beds with the "elephant skin" and tubercle texture diagnostic of microbial mats. The same bedding planes contain various other Ediacaran species: "Cyclomedusa", "Ediacaria", palaeopascichnids, "Eoporpita", "Yorgia", "Andiva", "Archaeaspinus", "Vendia", "Dickinsonia", "Anfesta", "Albumares", "Tribrachidium", "Kimberella", "Parvancorina", "Charniodiscus" and others.
Lake Kubenskoye lake. Administratively, the lake is divided between Vologodsky District (west), Sokolsky District (southeast), and Ust-Kubinsky District (east) of Vologda Oblast. In terms of the area, Lake Vozhe is the fourth natural lake of Vologda Oblast (behind Lake Onega, Lake Beloye, and Lake Vozhe) and the fifth lake (also behind the Rybinsk Reservoir). The area of the basin of the lake is . The basin occupies much of the central and northern parts of Vologda Oblast, as well as parts of Konoshsky District of Arkhangelsk Oblast. The major tributary of the lake is the Kubena River. The lake was settled by