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This Specimen has been sold.
HERE ARE SOME OTHER SIMILAR FOSSILS FOR SALE
15" Tractor Ammonite (Douvilleiceras) Fossil - Monster Specimen!
This is an absolutely monstrous Douvilleiceras ammonite from the Upper Cretaceous of Madagascar. It measures in at a whopping 15" wide and all together weighs 54 lbs. This genus of ammonite has earned the local name "Tractor Ammonites", due to their distinctively bumpy surface and pronounced ridges which resemble a tractor's tires. This particular example has been polished and nicely prepared to remove the hard rock and expose the shell. This is by far the largest ammonite of this species that we have ever had!
Three additional Douvilleiceras ammonites have been mounted to the open end of the large ammonite, along with 3 Cretaceous age clams of the genus Astarte. This stunning display comes with a large metal stand.
The center of these large ammonites rarely preserve which is the case with this specimen. A smaller Douvilleiceras ammonite has been composited into the center of the large ammonite.
Three additional Douvilleiceras ammonites have been mounted to the open end of the large ammonite, along with 3 Cretaceous age clams of the genus Astarte. This stunning display comes with a large metal stand.
The center of these large ammonites rarely preserve which is the case with this specimen. A smaller Douvilleiceras ammonite has been composited into the center of the large ammonite.
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
Douvilleiceras mammilatum (Ammonites) & Astarte sp. (Clams)
LOCATION
Mahajanga Province, Madagascar
SIZE
15" wide ammonite, weighs 54 lbs
CATEGORY
SUB CATEGORY
ITEM
#207432
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