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Two Toarcian Ammonite (Hammatoceras) Fossils - France
This is an association of two fossil ammonites of the genus Hammatoceras that was collected near Belmont, France. They are Toarcian (Jurassic period) in age, or approximately 180 million years old. The larger ammonite is 4.5" wide and the smaller is 3.3" wide. The ammonites have been partially exposed from the rock they were found in, with one edge cut flat for presentation purposes. There is a partial, unidentified belemnite on the back of this specimen.
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
Hammatoceras sp.
LOCATION
Belmont, France
SIZE
Largest Ammonite: 4.5" wide, Entire specimen: 6.1 x 5.7"
CATEGORY
SUB CATEGORY
ITEM
#191715
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