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 Karrinyup Country Club and the short par-4 14th which, due to clever bunkering, presents a number of options off the tee. The championship course scorecard is as follows. Please note that all measurements are from the Black (Championship) tees. Lake Karrinyup is consistently ranked as one of the top 20 courses in Australia. A slip in its ranking early in the 2000s was part of the motive for the Clayton redesign. Lake Karrinyup has played host to four Australian Opens (1952, 1960, 1968, 1974), two Johnnie Walker Classics (2002, 2003), and was the venue for the Perth International since 2012. Lake Karrinyup Country