1.9" Dactylioceras Ammonite Fossil - England

This is a classic British ammonite of the species Dactylioceras commune. These well preserved ammonites are Jurassic in age and are found in hard concretions that must be split open to reveal the fossil. The hard rock then has to removed mechanically to further expose the fossil.

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.
What an ammonite would have looked like while alive.
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DETAILS
SPECIES
Dactylioceras sp.
LOCATION
Whitby, North Yorkshire, England
SIZE
1.9" wide
ITEM
#52639
GUARANTEE
We guarantee the authenticity of all of our specimens.