| Grypania Temporal range:Paleoproterozoic–Ediacaran | |
|---|---|
 | |
| Grypania spiralis fossil | |
Scientific classification | |
| Domain: | Incertae sedis |
| Genus: | †Grypania Walter, Oehler & Oehler, 1976[1] |
| Type species | |
| Grypania spiralis Walter, Oehler & Oehler, 1976 | |
Grypania is an early, tube-shaped fossil from theProterozoic eon. The organism, with a size over one centimeter and consistent form, could have been a giantbacterium, a bacterial colony, or aeukaryoticalga.[2] The oldest probableGrypania fossils date to about 1870 million years ago (redated from the previous 2100 million)[2][3] and the youngest extended into theEdiacaran period.[4] This implies that the time range of this taxon extended for 1200 million years.
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