5.3" Asteroceras Ammonite With Promicroceras - Collector Piece

Asteroceras Ammonite With Promicroceras - Collector Piece #131932

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 cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.

More about ammonites