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Ammonites perisphinctes

Ammonites Perisphinctes

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Species Ammonite Perisphinctes sp.
Geological Period
Late Jurassic ≈ 163-141 ma
Origin Tulear , Madagascar
Size

Small: 3.0 - 4.0cm

Medium: 4.0 - 5.0 cm

Large: 5 .0 - 5.0 cm

This species is characterized by having thin, prominent and profuse dorsal ribs, while the thin ventral ribs branch off towards the belly.

The Ammonites were a group of cephalopods with a spiral shell, which thrived in the Mesozoic oceans, and abruptly went extinct along with the dinosaurs.

Its collective name refers to its resemblance to the spiral horns of a ram, with which the Egyptian god Amun was depicted in his Roman adaptation (Jupiter-Amun).

The group, numbering some 10,000 species, disappeared 65 million years ago, providing uncompromising support for biological evolution and evidence for our planet's changing biodiversity.

Deposits: Antarctica, Argentina, Cuba, Ethiopia, France, India, Iran, Italy, Madagascar, Poland, Portugal, United Kingdom, Russia, Saudi Arabia, Spain and Yemen.

The piece you receive may differ slightly from the photo shown, as the fossils are natural and no piece is identical. The size is approximate.