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6.4" Toarcian Ammonite (Pleydellia) Fossil Cluster - France
This is a cluster of fossil ammonites of the genus Pleydellia, collected from a location near St.-Quentin-Fallavier, France. They are Toarcian (Jurassic period) in age, or approximately 180 million years old. This specimen measures 6.4" long by 5.8" wide and 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.
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
Pleydellia sp.
LOCATION
St.-Quentin-Fallavier, Auvergne-Rhône-Alpes, France
SIZE
Largest ammonite 2.1" wide, entire specimen 6.4 x 5.8"
CATEGORY
SUB CATEGORY
ITEM
#152701
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