Rare 3.5″ Macrocephalites madagascariensis Fossil Ammonite, Lower Callovian, Jurassic – Sakara, Madagascar – Genuine with COA

Description

Rare 3.5″ Macrocephalites madagascariensis Fossil Ammonite – Lower Callovian, Jurassic – Sakara, Madagascar

100% Genuine Fossil with Certificate of Authenticity

We are delighted to offer this stunning 3.5-inch Macrocephalites madagascariensis fossil ammonite, found in Sakara, Madagascar. This rare specimen dates from the Lower Callovian stage of the Jurassic Period (~163 million years ago). Macrocephalites madagascariensis is a notable ammonite species, known for its distinctive coiled shell and the highly detailed suture patterns that mark it as a prized specimen among fossil collectors.

Geological and Fossil Information:

• Fossil Type: Macrocephalites madagascariensis Fossil Ammonite
• Species: Macrocephalites madagascariensis
• Morphology Features: This Macrocephalites madagascariensis ammonite features a distinct coiled shell with well-defined sutures and a smooth, rounded shape. The planispiral structure is representative of the Macrocephalites genus, which is known for its elegant spiraling and tightly coiled whorls.
• Geological Stage: Lower Callovian, Jurassic (~163 million years ago)
• Depositional Environment: The ammonite was formed in a shallow marine environment, typical of the Lower Callovian seas. The Jurassic period was characterized by warm, shallow seas, perfect conditions for ammonites like Macrocephalites madagascariensis to thrive.
• Biozone: The specimen belongs to the Lower Callovian biozone, which was marked by an abundance of marine life during the Jurassic period.
• Family: Desmoceratidae
• Super Family: Ammonitoidea
• Order: Ammonitida
• Formally Identified By: This fossil has been formally identified by paleontologists based on its morphological features and the geological context of its discovery in Sakara, Madagascar.

Size and Visuals:

The fossil measures approximately 3.5 inches in diameter. A scale rule (1cm squares) is included in the attached photo for accurate size reference. The photo shows the actual specimen you will receive, carefully selected to highlight its exceptional preservation and intricate features.

Authenticity and Certification:

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity, ensuring the provenance and authenticity of the fossil. This Macrocephalites madagascariensis ammonite from Sakara, Madagascar, is a rare and beautiful addition to any fossil collection.