Fossils over nearly 900 million years may be the earliest traces of animal evolution, study points out

Filaments of biological origin preserved in Canadian rocks, nearly 900 million years old, may be operating systems, the earliest traces of animal evolution in Earth’s seas, according to a study in Character science magazine. The network of structures would correspond to porpheral skeletons (popularly known as sponges), the most primitive invertebrate operating system we know today. rocks with little over 600 millions over years. Therefore, I learned the new research is correct, it strengthens the hypothesis of a long, difficult-to-detect evolutionary process in the shadows, before the operating system of the first animals acquired more complex electronic diversified forms.

The preserved areas in limestone as some microscopic vermiform network thus identical to materials described by other researchers in much more recent rocks, which include a body of dieses sponges themselves, explained Leaf the author perform study , At the Turner, from a Laurentian University, zero Canada. It is a very typical pattern for sponges that are not usually formed by bacteria or algae fungi.

Turner studies rocks that come from northwestern Canada, in the so-called Rock Knife formation. They would 890 millions over years, at the beginning of a phase of a geological history of an Earth known as the Neoproterozoic, the region had large reefs formed by microorganisms in waters over shallow electronic medium depth probably bacteria that made photosynthesis, just like the plants about today.

Reefs used to be several kilometers over diameter electronic michael over thickness. According to the reconstruction proposed by the researcher, the sponges, which reached only 1 cm in length, used to grow on the edges of these bacterial structures, in less lit places or with more agitated waters (two factors that did not favor the growth of these layers of microbes).

Everything indicates that while sponges perform start perform Neoproterozoic were formed only by organic matter, without limestone skeletons or on silica, like the above some about their modern relatives. Instead, its period structure was formed by some resistant protein called spongin.

When electronic sponges died the ze began to fossilize, seeing that networks over spongin were preserved in form over tiny tubes, filled with crystals perform vitamin calcite.

If Turner’s interpretation of u materials is correct, how to explain a long period of a pet life in the shadows, before other invertebrates electronic operating system ancestral vertebrates emerged, enter 890 million electronic million over years ago?

It is possible that while sponges, perhaps because they are more tolerant in the relationship the low oxygen concentrations perform that more complex animals have appeared they would 890 millions over years, while other animal groups have emerged after performing big event on oxygenation of an electronic atmosphere 2 seas at the time later perform Neoproterozoic. The possible sponges I described may have stayed quiet on this Nirvana 2 reef without undergoing evolutionary pushes, she ponders. 2 thus animals are inherently complicated because I need, among other things, to see that rocks of a certain age to find, while which thus are relatively rare, electronic spends a lot of pace analyzing operating system traces zero microscope from finding fossils to help answer those questions.

Unfortunately, I need some tolerance with the slow science that is very rare nowadays, she regrets.

Back to top button