Paleontologists have discovered a fossil of a newly discovered organism from the Ediacara Biota. Plexus ricei was a broadly curving tube that resided on the seafloor. Individuals range in size from 5 to 80 cm long and 5 to 20 mm wide, and comprise a rigid median tubular structure and a fragile outer tubular wall. Plexus ricei evolved around 575 million years ago, disappearing from the fossil record around 540 million years ago.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/c...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/c...