Story thread · 3 reports / 2 sources

Early Cambrian fossil uncovers key buoyancy structure at the dawn of cephalopod evolution

phys.org · 13dShare

Extant and ancient cephalopods—including octopuses, squids, extinct ammonites, cuttlefish and nautiluses—have all had to solve the problem of buoyancy, whether they have hard external shells or not.

First report: Earliest siphuncle-bearing cephalopod from the early Cambrian — nature.com, 13d