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3.2" Hoploscaphites Brevis Ammonite With Gastropods
This is a beautiful, 3.2" wide Hoploscaphites brevis from the Pierre Shale of South Dakota. It was found inside of a hard concretion and the rock had to be meticulously prepared away. There is a second ammonite, plus baculites and gastropods also present. The base of the rock has been cut flat so that the piece displays nicely on a flat surface. A really gorgeous piece.
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
Hoploscaphites brevis
LOCATION
Meade County, South Dakota
FORMATION
Fox Hills Formation - Timber Lake Member
SIZE
Ammonite 3.2" wide, entire piece 4.7" tall
CATEGORY
SUB CATEGORY
ITEM
#77847
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