[Fossils & History] Ancient ammonoids' shell designs may have aided buoyancy control

octobot

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From Eureka Alert:

Ammonoids, ancestors of today's octopus, squid and cuttlefish, bobbed and jetted their way through the oceans for around 340 million years beginning ...

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octobot

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Oct 15, 2005
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From UPI:

... Period, ammonoids, ancestors of today's octopus, squid and cuttlefish, were a constant presence in Earth's oceans for more than 340 million years.

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