RARE Douvilleiceras mammillatum Ammonite Fossil | Middle Albian Cretaceous | Analavia, Madagascar | Genuine Fossil w/ COA

Description

Presenting a RARE Douvilleiceras mammillatum ammonite fossil from the Middle Albian stage of the Early Cretaceous period, discovered in the fossil-rich marine strata near Analavia, Madagascar.

This fossil belongs to the genus Douvilleiceras, a robust and highly ornamented ammonite genus known for its coarse tubercles and strong ribbing. This specimen demonstrates classic morphological traits of the species, including broad whorls with nodose ribs and a thick shell wall—clear indicators of its defensive and possibly deep-water adaptation strategies.

You will receive the exact specimen shown in the photographs, with a scale cube (1cm squares) for accurate size reference. As always, all of our fossils are 100% genuine specimens and come with a Certificate of Authenticity.

Geological & Scientific Information:

• Species: Douvilleiceras mammillatum
• Type: Fossil Ammonite (extinct marine cephalopod mollusc)
• Geological Period: Cretaceous
• Stage: Middle Albian (approx. 107 to 105 million years ago)
• Location Found: Analavia region, Madagascar
• Order: Ammonitida
• Superfamily: Desmoceratoidea
• Family: Douvilleiceratidae
• Morphological Features: Coarsely ribbed and tuberculate shell; whorls rounded; nodose ribs present along ventrolateral margins.
• Depositional Environment: Shallow marine platform deposits, part of a warm tropical sea system during the mid-Cretaceous transgression over the Gondwanan margin.
• Biozone/Zone: Typically linked with the Mammillatum Zone in the global ammonite zonation for the Albian stage.
• Scientific Importance: Douvilleiceras mammillatum is a key index fossil for the Albian, used for correlation in Cretaceous stratigraphy across multiple continents.

Additional Notes:

This species is prized by collectors for its intricate ornamentation and large size. Specimens of this quality and provenance are becoming increasingly difficult to source from Madagascar due to site restrictions.

Why Buy From Us?

• 100% authentic fossils with expert verification.
• Includes a Certificate of Authenticity.
• You receive the actual specimen photographed.
• Ideal for fossil collectors, palaeontologists, and educational displays.

Add a remarkable and scientifically significant ammonite to your collection with this Douvilleiceras mammillatum fossil—a stunning relic from the marine life of the Cretaceous world.