Onega Peninsula Onega Peninsula The Onega Peninsula is located in Arkhangelsk Oblast, Russia. It protrudes into the White Sea, with Onega Bay to the south-west, and Dvina Bay to the north-east. The length of the peninsula is about , and the width varies between and . The coastal area of the peninsula is populated. The villages (counterclockwise) of Nyonoksa, Syuzma, Krasnaya Gora, Pertominsk, Unsky, Yarenga, Lopshenga, Letny Navolok, Letnyaya Zolotitsa, Pushlakhta, Lyamtsa, Purnema, and Nizhmozero are all located at or near the coast. The north-eastern coast of the peninsula is crossed by the Una Bay, a gulf in the Dvina Bay, which
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.