2.7" Hoploscaphites Brevis Ammonite - South Dakota

This is a beautiful 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.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. 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
Hoploscaphites brevis
LOCATION
Meade County, South Dakota
FORMATION
Pierre Shale
SIZE
2.7" Wide
ITEM
#43938
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