Arkhangelsk Military District Arkhangelsk Military District Arkhangelsk Military District () existed from March 26, 1940 to December 15, 1944, and again from February 15, 1946 to June 29, 1951. Command of the district was established from command elements of the 15th Army (Arkhangelsk). During the reorganization on January 1, 1945, it was renamed Belomorsky Military District (White Sea Military District). Included in the Arkhangelsk Military District were territories of Arkhangelsk and Vologda Oblasts and of the Komi ASSR. Headquarters of the military district was located in the city of Arkhangelsk. On June 22, 1941, army formations in the district included the 88th and
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.