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5.6" Jurassic Ammonite (Hildoceras) Fossil - England
This is a large, 5.6" wide Hildoceras bifrons ammonite from Whitby, England. It was found within a large concretion which was broken open to reveal the fossil. The majority of the surrounding rock has been removed, with portion of rock remaining for presentation purposes. The edge of the rock has been cut flat, allowing for the specimen to stand up nicely on a flat surface.
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.
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.
SPECIES
Hildoceras bifrons
LOCATION
Port Mulgrave, Whitby, North Yorkshire, England
FORMATION
Upper Lias, Bifrons Zone
SIZE
5.6" wide ammonite
CATEGORY
SUB CATEGORY
ITEM
#171256
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