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Collenia

Collenia
Temporal range: 2100–2400 Ma
Precambrian
Collenia undosa Minnesota.jpg
Section of Collenia undosa stromatolite from 2110 million year old banded iron formation, Biwabik
Stromatolithi - Collenia nudosa.JPG
Collenia undosa stromatolite from Precambrian of United States
Scientific classification
Kingdom: Bacteria
Phylum: Cyanophyta
Family: Spongiostromata
Subfamily: Stromatolithi
Genus: Collenia
Walcott, 1914
species
  • C. frequens
  • C. symmetrica
  • C. undosa

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.


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Wikipedia

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