Reviews
This Specimen has been sold.
HERE ARE SOME OTHER SIMILAR FOSSILS FOR SALE
6.85" Cretaceous Heteromorph Ammonite - Pierre Shale, South Dakota
This is a bumpy, 6.85" heteromorph ammonite specimen collected from the Pierre Shale of Montana. It may be a portion of an ammonite from the genus Didymoceras, but this is inconclusive. The ammonite has really nice iridescence and shell preservation considering that it has undergone a decent amount of reconstruction. It is a cool piece that would make a great addition to any collection.
It comes with an acrylic display stand.
It 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
Didymoceras?
AGE
LOCATION
Cheyenne River, South Dakota
FORMATION
Pierre Shale
SIZE
Ammonite: 6.85" wide
CATEGORY
ITEM
#196090
We guarantee the authenticity of all of our specimens.
