Three Devonian Ammonites (Anetoceras) With Trilobite Heads
This is a 14.5" wide cluster of three nicely preserved Early Devonian ammonites (Anetoceras) along with several heads of phacopid trilobites. This is a natural association, not a composite and displays very aesthetically on the included display stand.
Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus. Ammonites appeared in the fossil record about 240 million years ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.