Gorgeous Androgynoceras Ammonite Cluster (13) - Germany
This is an aesthetic cluster featuring a total of 13 ammonites in a natural association, along with several partial belemnites and impressions of more ammonites. The majority of the ammonites are of the Androgynoceras genus. There is one nicely-repaired crack running through the rock, but no other repairs or restoration that we can see. It makes a beautiful presentation on the included acrylic 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.