Atakia
Atakia is a genus of animals that were members of the Ediacaran fauna, which existed from 635 to 541 million years ago. Discovered in Ukraine in 1979 by Palij, the genus "Atakia" are soft-bodied Metazoan cast in Vendian sediments found on the Eastern European Platform formations. Oftentimes the genus "Atakia" is used as a comparison to other genera, because very little information is known about this genus. There is a discontinuity in identification because the genus "Fustiglyphus Vialov" is debated to be the same as "Atakia" but found in different regions. Morphology, anatomy, and behavior. There is little  information on the morphology, anatomy, and behavior on the genus "Atakia", but there is a suggestion that "Fustiglyphus" may be misidentified to be "Atakia." The two genera are compared with one another in Ivantsov et al., 2018. Within this paper, "Atakia" is described as having “disc-shaped casts with an adjoining worm-like body,” while "Fustiglyphus" has “horizontal cylindrical traces of a different length have more or less regular bead-like expansions.” In short, both of these genera are similar in the association with bead-like and rounded morphology with “tadpole-like prints”. The worm has a ratio of approximately  1:3 of head to tail where the tail part has a segmented structure. There have also been no traces of movement from around the structures of "Atakia", so it is assumed that the prints are planktonic. Muscente et al., 2019 used COPRA (community overlap propagation algorithm) to describe the "Atakia" genera and found they have a morphogroup most like porifera (putative). With various rock lithologies and a poor degree of preservation, it’s difficult to say which side of the "Atakia" specimen is its head or tail in the figure below. Fossilization. The mode of preservation found for Atakia and  related species according to COPRA (community overlap propagation algorithm) is secondary mineralization of fossils and carbonaceous compressions. "Atakia" has very poor preservation that also hinders any identifying information about the biogenic nature of the specimen. Distribution and paleoenvironment. The specimens of "Atakia" were found in the Vendian sediments in the formations of the Eastern European Platform, specifically the Urals and Podolia. From matching facies, a paleoenvironment where specimens were found was determined to be a shallow sea in a clastic lower shoreface. This specific genera are categorized as Ediacara-type fossils from 571 to 551 Ma. Based on stratigraphic index  fossils, "Atakia" thrived in the Ediacara biota biozone, but within less than five stratigraphic formations. In specific, some specimens were found in a clay siltstone substrate. The paper by Muscente et al., 2019 applied COPRA (community overlap propagation algorithm) to the Ediacaran genera to detect four overlapping modules. The largest cluster, called the White Sea cluster, consists of bilateralomorph, dickinsoniomorph, and kimberellomorph genera. The Avalon module primarily consists of rangeomorphs. The Nama cluster includes Ediacaran-type fossils and carbonate compressions. The last module is the Miaohe module, which primarily have filament, strap, and ribbon shaped characteristics. All of these module  can overlap with each other to include more groups of taxa. Specifically, the "Atakia" taxon lies in between the Nama and White Sea cluster. Within this group, only fourteen genera are found, which shows the sheer scarcity of "Atakia" and any related genera (Horodyskia, Helanoichnus, Fusosquamula, Saarina, Ausia, etc). The paper by Yevheniia (2018) describes the geology of the sequences "Atakia" and other genera were found in. These genera were found in the Yarishivska Formation, which consists of three sedimentary sequences, named Bernashevsky, Bronnitsky, and Zinkovsky. The Bernashevsky sequence is 15-17 meters thick primarily consisting of sandstones 10-12  meters thick. The base of the sequence includes layers of tuffaceous argillites and bentonite. Some major mineral constituents include mica and kaolinite in the bentonite layers. Other notable characteristics. The identification of the "Atakia" genus is debatable as it closely matches and suspected to be the same as the genus "Fustiglyphus Vialov", which are found in the same regions as "Atakia", but are scattered throughout different stratigraphic formations.