Rare, 12.5" Ammonite (Argonauticeras) - Befandriana, Madagascar

 
 
 
 
 
 
 
 
This is not one of your typical Madagascar ammonites, it is a rare Argonauticeras from Befandriana in Northern Madagascar. The chambers are filled with a gorgeous, honey/orange colored agate. It's been sliced in half and polished to reveal the inner chamber detail.

I've only been able to acquire a handful of these ammonites over the years as the location they come from is more remote.

This ammonite is very thick and heavy. It's around 2.8" thick at its widest point and the pair weighs about 27 lbs. The very center of the ammonite has been composited from another partial specimen because it was not very well defined. This is very frequently the case with larger ammonites.

Comes with a pair of metal display stands.

Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus. Ammonites appeared in the fossil record about 240 million years. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

DETAILS
SPECIES
Argonauticeras sp.
LOCATION
Befandriana, Northern Madagascar
SIZE
12.5" wide (each half), up to 2.8" thick
ITEM
#168520
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