3.8" Jurassic Ammonite (Hildoceras) Fossil - England

This is a 3.8" wide Hildoceras bifrons ammonite from Somerset, England. These well preserved ammonites come from a Lower Jurassic-aged marine deposit, making them approximately 180 million years old. The rock has been painstakingly removed from one side of the ammonite.

Comes with an acrylic display stand.

About Ammonites

Ammonites were ancient marine cephalopods, similar to today's squids and octopuses, but with a defining feature: their distinctive, tightly coiled spiral shells. These shells, resembling those of modern nautiluses, served as both a protective home and a buoyancy aid, allowing ammonites to navigate the prehistoric seas with ease. First emerging around 240 million years ago in the Triassic Period, ammonites thrived for over 175 million years, adapting through numerous forms and sizes. As predatory creatures, they likely fed on smaller marine organisms, using their tentacles to capture prey. However, their long reign came to an end 65 million years ago at the close of the Cretaceous, coinciding with the mass extinction event that also eliminated the dinosaurs.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.
FOR SALE
$39
DETAILS
SPECIES
Hildoceras bifrons
LOCATION
Ilminster, Somerset, England
SIZE
3.8" wide
ITEM
#284031
GUARANTEE
We guarantee the authenticity of all of our specimens.