2.2" Fossil Ammonite (Hoploscaphites) - South Dakota

This is a 2.2" ammonite (Hoploscaphites) from the Fox Hills Formation of South Dakota. The outer shell is gone leaving the intricate pattern of the inner shell sutures. It has been wonderfully prepared on the hard concretion in which it was found. The rock has been cut to act a stand for this interesting specimen.



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. Ammonites appeared in the fossil record about 240 million years ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

FOR SALE
$55
DETAILS
SPECIES
Hoploscaphites nicolleti
LOCATION
South Dakota
FORMATION
Fox Hills Formation
SIZE
2.2" ammonite, 2.5 x 1.9" rock
ITEM
#117167
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