Sulfate-reducing bacteria break down a large proportion of the organic carbon in the oxygen-free zones of Earth, and in the seabed in particular. Among these important microbes, the Desulfobacteraceae ...

(a) Optical photograph of a soft-bodied macrofossil (specimen No. cy266) of unknown affinity, with abundant filamentous microfossils of Q. cambria (b–g) present on the surface. (b) SEM image of ...

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