What is Dickinsonia?

Dickinsonia is an iconic organism of the Ediacaran fauna, which is one of the first known representatives of multicellular life on the planet. dickinsonia appears as a ribbed oval with a gliding symmetry. For most of your life it was stationary, although it could sometimes move from the place of rest to the resting place. Like other EDIACARAN organisms, there are many debates on the affinity dickinsonia , although most workers believe it is a bilateral animal, perhaps ancestors of the chords. The classification at the Kingdom level is officially incetae sedis (unknown classification).

dickinsonia lived about 560 - 541 million years ago, during the late Ediacaran. It was parallel to other odd Edicaranian organisms that resemble mud bags, shank and mattresses. These are not animals as we know them. dickinsonia is sometimes inserted into Phylum Proarticulata , which would be the only animal phylumpocud it really existed, ÚPLno disappears. Other animals that have ever inserted this phylum are Yorgia, Vendia, Archaeasspinus, Andiva and ovatoscutum . These animals were not really bilateral, but had a "sliding reflection" of bilateral symmetry, where one side was partially equalized by the other.

Dickinsonia left for non -coated imprints found in the famous Flinders Ranges in South Australia, as well as Rajastan in India, Podolia in Ukraine and Russia in the White Sea. Fossils move wild in size from 4 mm (small) to 1.4 m (humans). These extreme variations have forced some paleontologists to consider the sponge or a dickinsonia to the animal rather than an animal, but there are other examples of this variation in the animal world. Dickinsonia obviously grew on all steps until it was covered with sediment or other killed.

Dickinsonia disappeared along with the rest of the EdiacaranianFauna at the dawn of Cambrian. The reason for this extinction is not known, but hypotheses include the usual suspicious (volcanism, impact of asteroids, etc.), but also several new ones, including the arrival of predators or to be performed by more efficient Cambrian organisms. Without further fossil and paleoclimactic evidence, we may never know.