| Cyanorus Temporal range: Ediacaran, around
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|---|---|
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| Restoration of C. singularis | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | †Proarticulata |
| Class: | †Cephalozoa |
| Family: | †Sprigginidae |
| Genus: | †Cyanorus Ivanstov, 2004 |
| Species: | †C. singularis
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| Binomial name | |
| †Cyanorus singularis Ivanstov, 2004[1]
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Cyanorus singularis[a] is a small proarticulatan, closely related to Spriggina and Marywadea.[2] The anterior part of the body was most likely not segmented. The axial structure of it combines features of the Vendia species and Dickinsonia species. It was found in the Upper Vendian of the White Sea area, Arkhangel'sk Region.[2] It is a White Sea Ediacaran fossil and it became extinct during the Late Precambrian.
Like other animals from the phylum Proarticulata, the symmetry observed is not exactly bilaterian[3] but appears to be a glide reflection, where opposite segments are shifted by half an interval.[4] [5] [6]
- ^ "Species †Cyanorus singularis - Hierarchy - The Taxonomicon". taxonomicon.taxonomy.nl. Retrieved 15 December 2018.
- ^ a b Ivantsov, A. Yu. (2004). "New Proarticulata from the Vendian of the Arkhangel'sk Region". Paleontological Journal. 38 (3): 247. CiteSeerX 10.1.1.738.7043.
- ^ McCall, GJH (2006). "The Vendian (Ediacaran) in the geological record: Enigmas in geology's prelude to the Cambrian Explosion". Earth-Science Reviews. 77 (1–3): 1–229. Bibcode:2006ESRv...77....1M. doi:10.1016/j.earscirev.2005.08.004.
- ^ Ivantsov, Andrey (2001). "Vendian and Other Precambrian "Arthropods"". Paleontological Journal. 35: 335–343.
- ^ Ivantsov, Andrey (2011). "Feeding traces of proarticulata-the Vendian Metazoa". Paleontological Journal. 45 (3): 237–248. doi:10.1134/S0031030111030063.
- ^ Ivantsov, Andrey (December 2023). Abstract of the thesis paleobiology of Proarticulata and the problem of the rise of Bilateria. Russian Academy of Sciences (Thesis). Retrieved 4 Dec 2024.
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