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1.8" Hoploscaphites Ammonite in Situ - Pierre Shale, Montana
This is a bumpy, 1.8" Hoploscaphities ammonite specimen collected from the Pierre Shale of Montana. It was prepared with a portion of the original rock it was found in left intact.
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
Hoploscaphities sp.
AGE
LOCATION
Glendive, Montana
FORMATION
Pierre Shale
SIZE
Ammonite: 1.8" wide, Rock: 2 x 2"
CATEGORY
ITEM
#189648
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