Douvilleiceras mammilatum
Order Ammonoidea
Geological Time: Upper Early Cretaceous, Albian Stage
Size (25.4 mm = 1 inch): Ammonite fossil is 75 mm diameter, 35 mm across living chamber
Fossil Site: Mahajanga Province, Madagascar
Fossil Code: AM017
Price: Sold
 Description:
This fine ammonite is Douveilliceras mammilatum from Madagascar
which has much of the original shell present. The lack of acidity
in the depositional environment allowed them to be preserved
as you see it here. Notice the knobs present on this fine example.
Members of the genus are found with spines, tubercles, or knobs,
and are thought to be indicative of a hostile environment in
which such structures were necessary as a defense. |
