Collenia Temporal range: 2100–2400 Ma Precambrian |
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Section of Collenia undosa stromatolite from 2110 million year old banded iron formation, Biwabik | |
Collenia undosa stromatolite from Precambrian of United States | |
Scientific classification | |
Kingdom: | Bacteria |
Phylum: | Cyanophyta |
Family: | Spongiostromata |
Subfamily: | Stromatolithi |
Genus: |
Collenia Walcott, 1914 |
species | |
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Collenia is genus of fossil cyanobacteria that form a particular type of stromatolites.
Collenia are stromatolites made up of convex layers flattened in the center, forming columnar colonies. The microorganisms involved were likely photosynthetic bacteria expiring oxygen.
Collenia stromatolites were very common in the late Precambrian, about 2.2 to 2.4 billion yearsago.