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EVOLUTION
- Between 1.89-1.84 Ga, there was the existence of Cyanobacteria fossil record.
-Around 2.4, Cyanobacteria were the only prokaryotic organisms that perform oxygenic photosynthesis.
-Approximately 1.05 Ga ago, the photosynthetic characteristics spread among eukaryotic organisms.
-It was identified that cyanobacteria were only 3 fossil taxa which was: Archaeoellipsoides, Eoentophysalis, and Eohyella.
They are all considered early cyanobacteria due to the similarities in features, morphology, and habitats.
COMPARASION
Here are some possible cyanobacteria microfossils that share morphological similarities that scientists discovered approximately 1.0 Ga ago.
POSSIBLE MICROFOSSILS
Microfossil
Morphology
Dimensions
(μm)
Significant
Imagine
Archaellipsoides
Rounded with flat vesicles
50
-Proof for early cyanobacterial life.
Eoentophysalis belcherensis
spherical, hemispherical or mushroom-like shape
2.5
-Evidence to the evolution of photosynthetic creatures.
Eohyella
small, filamentous formations, photogenesis
4
Understanding the morphology and ecology of cyanobacteria.
Aquatic, photosynthetic
Cyanobacteria
75
Sources: Free Radical Biology and Medicine, 140, 206–223. https://doi.org/10.1016/j.freeradbiomed.2019.05.007
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