Collenia
Extinct genus of cyanobacteria
From Wikipedia, the free encyclopedia
Collenia is genus of fossil cyanobacteria that form a particular type of stromatolites.[2]
| Collenia | |
|---|---|
| |
| Section of Collenia undosa stromatolite from 2110 million year old banded iron formation, Biwabik | |
 | |
| Collenia undosa stromatolite from Precambrian of United States | |
Scientific classification  | |
| Domain: | Bacteria |
| Kingdom: | Bacillati |
| Phylum: | Cyanobacteriota |
| Class: | incertae sedis |
| Genus: | †Collenia Walcott 1914[1] |
| Type species | |
| †Collenia undosa | |
| Species | |
| |
Description
Collenia are stromatolites made up of convex layers flattened in the center, forming columnar colonies. The microorganisms involved were likely photosynthetic bacteria expiring oxygen.[3]
Fossil record
Collenia stromatolites were very common in the Paleoproterozoic era during the Siderian and Rhyacian periods, about 2.2 to 2.4 billion years ago.