The Mesozoic marine revolution (MMR) was a fundamental restructuring of marine ecosystems during the Mesozoic period caused by increased predation pressure.

The term was coined by Vermeij (1977) based on the earlier work of Stanley (1974).^[1]

The MMR was not the first bout of increased predation pressure; this also picked up in a phase dated to around the end of the Ordovician.^[2]

[edit] Casualties

Organisms which went into decline include stalked crinoids, articulate brachiopods, and endobyssate bivalves.^[1] Weakly armoured gastropods also disappeared, while more heavily armoured taxa diversified.^[3]

[edit] References

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