No bigger than a grain of rice! This is the size ofIkaria wariootia, a new organism launched by a team of American and Australian researchers. In a study published inpursue the discovery of . It could be the last ancestor of all , a group of organisms, including most modern animals. “” Evolutionary biologists have predicted this “” Mary Droser, co-author of the study.
As a matter of fact, Ikaria wariootia seems to be accumulating promising criteria. It would connect that, where the oldest known complex multicellular organisms come together, and the because during the Ediacaran the transition between simple microscopic forms and complex animal life took place. Most of them, however those from this period do not have the basic features of modern animals, such as the anterior-posterior differentiation: the head is not confused with the buttocks.
The two to seven millimeter long creature has this distinction in addition to the left-right symmetry (called “bilateral”) that characterizes the Bilaterians. Signs that he was feedingBio suggest that his mouth and his were connected by a .
And a last criterion suggests thisIkaria wariootia could be the ancestor of the animal kingdom: its rudimentary sense faculties. He had buried himself in thin layersat the bottom of the ocean looking for organic matter. This is not accidental, but rather primitive sense organs.
The organism, which was scanned in 3D from petrified traces, seems to meet all criteria to be the ancestor of modern animals. Whose man. “” After getting the 3D scans, we knew we had made an important discovery Ecstatic Scott Evans, co-author of the study.