18.5" Polished Ammonite (Argonauticeras) Fossil - Giant Specimen!

This is a massive, 18.5" wide polished ammonite fossil (Argonauticeras besairiei), collected near Ambatolafia, Madagascar. It makes for a very impressive display on the included metal display stand.

You rarely get ammonites of this size out Madagascar. While it is incomplete on one side, this is to be expected on larger ammonites that will typically be found as partials or already fractured/fragmented within the rock. The rock from the display side has been meticulously prepped away and the ammonite has been polished.

Comes with a rebar display stand.

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. True ammonites appeared in the fossil record about 240 million years ago. 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
$3,750
DETAILS
SPECIES
Argonauticeras besairiei
LOCATION
Ambatolafia, Mahajanga Province, Madagascar
SIZE
18.5" wide, 6.3" thick, 68.7 lbs
ITEM
#214773
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