Major modern phyla diversify
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Firmicutes
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Actinobacteria
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Bacteroidota
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Continued Proteobacteria expansion
Bacteria Diversify: Major modern phyla
By Michael Alan Prestwood
Author and Natural Philosopher
02 Feb 2026
Published 5 hours ago.
Updated 59 minutes ago.
Bacteria Diversify: Major modern phyla
~1.3 Billion years ago (+/- 200 million)
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