Grypania is an early, tube-shaped fossil from the Proterozoic eon.

The organism, with a size over one centimeter and consistent form, could have been a giant bacterium, a bacterial colony, or a eukaryotic alga.

[2] The oldest probable Grypania fossils date to about 2100 million years ago (redated from the previous 1870 million)[2][3] and the youngest extended into the Ediacaran period.

[4] This implies that the time range of this taxon extended for 1200 million years.

This prehistoric biota article is a stub.