This Specimen has been sold.
2.4" Cretaceous Ammonite (Prionocyclus) Fossil - South Dakota
This is a 2.4" wide Prionocyclus wyomingensis ammonite from Cretaceous-aged Carlile Shale formation in Edgemont, South Dakota.
It comes with an acrylic display stand.
It comes with an acrylic display stand.
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.
SPECIES
Prionocyclus wyomingensis
AGE
LOCATION
Edgemont, South Dakota
FORMATION
Carlile Shale
SIZE
2.4" wide
CATEGORY
ITEM
#262659
We guarantee the authenticity of all of our
specimens. Read more about our
Authenticity Guarantee.
specimens. Read more about our
Authenticity Guarantee.