5.3" Asteroceras Ammonite With Promicroceras - Collector Piece

This is an outstanding Lyme Regis ammonite specimen that came out of an old collection. There is a beautiful, 5.3" wide, agate replaced Asteroceras obtusum nicely presented on a thick piece of limestone along with a smaller Promicroceras planicosta ammonite. The coloration and sutures on the ammonite are gorgeous. The base of the rock has been cut flat so that it displays nicely on a hard surface without the need for a 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.

Asteroceras obtusum & Promicroceras planicosta
Charmouth, Lyme Regis, Dorset, England
Upper Inferior Oolite
Ammonites 5.3" & 1.15", Rock 12x6.8"
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