Grypania

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Grypania is an early, tube-shaped fossil from the Proterozoic Eon. The organism could have been a giant bacterium or bacterial colony, but because of its size (over one centimeter) and consistent form, is more likely to have been a eukaryotic alga. The oldest probable Grypania fossils date to about 2100 million years ago, and the youngest extended into the Mesoproterozoic Era. Grypania reproduced asexually.

[edit] See also

• Proterozoic

• http://www.peripatus.gen.nz/paleontology/MaiLinEvo.html