| Grypania
Temporal range: Paleoproterozoic–Ediacaran
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| Grypania spiralis fossil | |
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| Genus: | Grypania Walter, Oehler & Oehler, 1976[1] |
| Type species | |
| Grypania spiralis Walter, Oehler & Oehler, 1976 | |
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.
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Eukaryote classification
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| Incertae sedis |
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| Grypania spiralis |
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