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- Decastronema kotori gen. nov., comb. nov.: a mat-forming cyanobacterium on Cretaceous carbonate platforms
Microorganisms on carbonate platforms have been subjected to significant long and short-term changes in environment. Prokaryotes such as cyanobacteria have responded by adaptations to environmental instabilities and have re-occupied their niches after catastrophic changes, including periods of major extinctions. Their record as fossils continues unbroken although it is accompanied by changes in the composition of successful but short-lived narrowly specialized eukaryotic microbiota, e.g. coccolithophorids, foraminifera and calcareous algae. We expect, therefore, that Decastronema-type fossils will eventually be found in peritidal settings throughout the Phanerozoic and perhaps earlier.
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