1.35" Discoscaphites Gulosus Ammonite With Gastropods - South Dakota

This is a 1.35" wide Discoscaphites gulosus ammonite specimen from the Fox Hills Formation of South Dakota. It's been wonderfully prepared nearly free from the hard concretion it was found in.

Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus. True ammonites appeared in the fossil record about 240 million years ago. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.
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DETAILS
SPECIES
Discoscaphites gulosus
LOCATION
Dewey County, South Dakota
FORMATION
Fox Hills Formation - Trail City Member
SIZE
1.35" Wide
ITEM
#110582
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