Lot: 24 Lbs Bumpy Ammonite (Douvilleiceras) Fossils - 100 pieces

This is of lot of 100 Douvilleiceras ammonites weighing 24 lbs from the Upper Cretaceous of Madagascar. They range in size from 1.6 - 3.6" wide with most being in the middle of that size range. This genus of ammonites has earned the local name "Tractor Ammonites", due to their distinctively bumpy surface and pronounced ridges making them resemble a tractor tire.

Ammonites were predatory mollusks that resembled squids with shells. These cephalopods had eyes, tentacles, and spiral shells. Though their shells resemble that of a nautilus, they are actually more closely related to living octopuses. Ammonites appeared in the fossil record about 240 million years ago, barely surviving several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

Artist's reconstruction of an ammonite,  by Nobu Tamura
Artist's reconstruction of an ammonite, by Nobu Tamura
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DETAILS
SPECIES
Douvilleiceras mammilatum
LOCATION
Mahajanga Province, Madagascar
SIZE
1.5 to 3.6" Wide, 100 Ammonites
CATEGORY
ITEM
#148842
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