4.15" Polished Jurassic Ammonite (Perisphinctes) - Madagascar

This is a 4.15" wide ammonite (Perisphinctes sp.) fossil that was collected near Sakaraha in the Tulear Province of Madagascar. It is Jurassic (Oxfordian Stage) in age or approximately 160 million years old. It has a well defined ribbing and it's quite heavy for its size. The exterior has been lightly polished.

This ammonite is accompanied by 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.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.
FOR SALE
$35
DETAILS
SPECIES
Perisphinctes sp.
LOCATION
Near Sakaraha, Tulear Province, Madagascar
SIZE
4.15" wide
ITEM
#283201
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