Reviews
Jurassic Ammonite (Sigaloceras) Fossils - Gloucestershire, England
This is a beautiful pair of ammonite fossils of the species Sigaloceras calloviense. The specimen was collected from the Middle Jurassic (Callovian Stage) Konegi Subzone - Calloviense Zone of the Kellaways Formation in Gloucestershire, England. They have been beautifully exposed from the rock they were found in.
The edge of the rock has been cut flat for presentation.
The edge of the rock has been cut flat for presentation.
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.
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.
$165
SPECIES
Sigaloceras calloviense
LOCATION
Aston Keynes, Gloucestershire, England
FORMATION
Kellaways Formation - Konegi Subzone
SIZE
Largest Ammonite: 1.9" wide, Entire Specimen: 5.1 x 3.5"
CATEGORY
SUB CATEGORY
ITEM
#351252
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