13" Spiny Jurassic Ammonite (Apoderoceras) Fossil - England

This is a massive, 13" wide, spiny ammonite (Apoderoceras cf. leckenbyi) fossil from Charmouth, England. It has been nicely prepared using mechanical tools to remove the surrounding limestone. Many of the spines are particularly preserved but they have not been restored as is typically seen. Small, naturally associated ammonite fossils can be found scattered throughout the specimen. The rock has been cut flat so that it stands up nicely without the need for a display stand. The entire specimen measures 16.1' tall by 12" wide and weighs just over 57 lbs.

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.
What an ammonite would have looked like while alive.
Apoderoceras cf. leckenbyi
Charmouth, Lyme Regis, Dorset, England
Lower Lias, Taylori Subzone, Jamesoni Zone
Ammonite: 13" wide, Entire specimen: 16.1 x 12", Weight: 57 lbs
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