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 Onega bells, also there is an indoor ice sports arena accommodating 1,850 spectators and a Palace of Arts with an organ. Medvezhyegorsk city was founded in 1916 and from 1931 became the construction base of the White Sea – Baltic Canal. Between 1703–1710 and 1766–1769 a factory was operating on the site of the city. During the World War II, for three years this area was occupied by the Finnish forces and was a place of busy military activities. The main attraction of the lake is the island of Kizhi in the northern part of the lake, which is a State