Ammonite - Fossilised shell - Ammonoidea - 29 cm - 13.8 cm





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Two Ammonoidea ammonites from Madagascar, Devoon, polished and in natural condition, mounted on a standard, total weight 1656 g, with each ammonite measuring about 20.5 × 17 cm.
Description from the seller
Beautiful ammonite set on a stand from Madagascar.
Ammonites (Ammonoidea) are an extinct subclass of the Cephalopoda (octopuses and related). They are marine animals that occurred worldwide in large numbers in the Late Paleozoic and throughout the entire Mesozoic. They are found as fossils. Ammonites have a flat, spiral shell built from several chambers. Whenever the animal becomes too large for the current chamber, a new larger outer chamber is formed. In this outer chamber the animal lives, using the other empty chambers below as a means to move vertically. The ammonite exhales gas into these chambers to regulate buoyancy of the shell. Ammonites occurred in hundreds of species and varieties.
Additional information
HxWxD:
Left 29x13.8x9.5 cm (including stand)
Right 29x13.8x9.5 cm (including stand)
20.5 x 17 cm (per ammonite)
Weight: 1656 (total 2 ammonites)
Origin: Madagascar
Seller's Story
Beautiful ammonite set on a stand from Madagascar.
Ammonites (Ammonoidea) are an extinct subclass of the Cephalopoda (octopuses and related). They are marine animals that occurred worldwide in large numbers in the Late Paleozoic and throughout the entire Mesozoic. They are found as fossils. Ammonites have a flat, spiral shell built from several chambers. Whenever the animal becomes too large for the current chamber, a new larger outer chamber is formed. In this outer chamber the animal lives, using the other empty chambers below as a means to move vertically. The ammonite exhales gas into these chambers to regulate buoyancy of the shell. Ammonites occurred in hundreds of species and varieties.
Additional information
HxWxD:
Left 29x13.8x9.5 cm (including stand)
Right 29x13.8x9.5 cm (including stand)
20.5 x 17 cm (per ammonite)
Weight: 1656 (total 2 ammonites)
Origin: Madagascar

