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4.9" Giant Ammonite Aptychus Fossil in Rock - Smoky Hill Chalk
This is a fossil aptychus that has been exposed from the rock it was found in. It was collected from the Smoky Hill Chalk of Gove County, Kansas. This is a unique fossil that comes from the part of the body of an ammonite known as an aptychus. It's debated as to whether the aptychus is a two part hatch that covered the opening of the ammonite, or a double-plate jaw piece. At their initial discovery the aptychus was mistaken for a bivalve fossil. One mostly complete hatch and a second, partial hatch are present on the rock
Comes with an acrylic and metal display stand.
Comes with an acrylic and metal 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
Unidentified Ammonite
LOCATION
Gove County, Kansas
FORMATION
Smoky Hill Chalk, Niobrara Formation
SIZE
4.9" wide aptychus on 9.1 x 7.4" rock
CATEGORY
ITEM
#208260
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