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Palaeopascichnus delicatus Palij, 1976 & Cyclomedusa davidi Sprigg, 1947 & Neonereites biserialis Seilacher, 1960 & Nemiana simplex Palij, 1976
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Products description
| This slab shows the following Ediacaran fossils: Palaeopascichnus delicatus, Cyclomedusa davidi, Neonereites biserialis, and Nemiana simplex. This particularly rich slab originates from the Ediacaran of Ukraine. Palaeopascichnus was widespread during the Ediacaran and was initially interpreted as a trace fossil. However, it is actually a body fossil. Seilacher (2003) and Seilacher & Mrinjek (2011) discuss the strong similarities of Palaeopascichnus with xenophyophores, a group of large foraminifera that use sediment grains to build agglutinated shells. In particular, the recent species Aschemonella monile (Gooday & Holzmann, 2017) shows a very high similarity to Palaeopascichnus. These similarities might be superficial, as such multi-chambered shells can independently occur in different animal groups. Nevertheless, Palaeopascichnus seems to be more closely associated with foraminifera than with other existing groups. Neonereites biserialis is a rather complex ichnofossil created by a relatively complex organism. It is interpreted as a feeding trace left by a sediment-feeding organism. The two-row structure of the burrows suggests that the organism possibly had bilateral symmetry and moved through the sediment while feeding. These trace fossils provide valuable insights into the behaviors and ecological interactions of early organisms. Additionally, this slab contains several fossils that can be attributed to Cyclomedusa davidi. These fossils are easily identifiable by their concentric rings and central elevation. The assemblage is rounded off by some small specimens of Nemiana simplex (Palij, 1976), characterized by their smooth surface and simpler, round form. This is a particularly versatile slab from the Ediacaran of Ukraine, showcasing an impressive diversity of Precambrian life forms. | |||
Location: | Novodnistrovsk quarry, Chernivtsi province, Podolia region, Ukraine | ||
| Plate Size : | about 182 x 194 mm | ||
| Age: | Precambrian, Ediacarum, Late Neoproterozoic, Lomozhov beds, Mogilev formation (About 600 Ma) | ||
Product no.: 11508