RARE 9″ Macrocephalites typicus Fossil Ammonite | Lower Callovian Jurassic | Madagascar | Genuine with COA

Description

RARE: Macrocephalites typicus Fossil Ammonite (9″)

Geological Age: Lower Callovian, Middle Jurassic (~166 to 164 million years ago)

Location Found: Madagascar

Fossil Type: Ammonite (Extinct Marine Cephalopod)

Species: Macrocephalites typicus

Order: Ammonitida

Superfamily: Stephanoceratoidea

Family: Macrocephalitidae

 

Specimen Overview:

This beautifully preserved 9-inch ammonite is Macrocephalites typicus, a large, iconic species from the Lower Callovian stage of the Middle Jurassic. Found in the fossil-rich strata of Madagascar, this specimen showcases striking ribbing and symmetry, making it both a scientifically valuable and visually stunning display piece.

The exact specimen photographed is the one you will receive. A 1cm scale cube is included in the image for reference. Please review the photo for precise sizing and preservation quality.

 

Geological Context & Depositional Environment:

Madagascar’s Jurassic marine sediments were formed in a shallow, warm, tropical sea that surrounded the ancient Gondwana supercontinent. The fine-grained limestones and marls in which these ammonites are preserved offer exceptional fossil detail.

Macrocephalites typicus is a key ammonite species for the Lower Callovian and may be associated with the Macrocephalites herveyi or gracilis zones depending on local stratigraphy. These ammonites are important for dating Jurassic strata globally and understanding palaeogeographic connections between Africa, India, and Europe.

 

Morphology & Notable Features:

Macrocephalites typicus is characterised by its large, moderately involute shell with a rounded whorl section and prominent, evenly spaced ribbing. The ribs often bifurcate along the flanks and extend over a gently arched venter. The size, symmetry, and completeness of this 9″ specimen make it a standout collector’s piece.

The species name typicus reflects its role as a representative form of the genus—making it not only beautiful but taxonomically important.

 

Authenticity & Guarantee:

All of our fossils are 100% genuine and include a Certificate of Authenticity. This specimen has been carefully selected and professionally prepared to ensure long-term preservation and premium visual impact.

 

Perfect For:

• Collectors of large, rare ammonites
• Educational or museum displays
• Geological and stratigraphic reference collections
• Unique, natural home décor or gifts

Capture a timeless relic of Jurassic seas with this rare Macrocephalites typicus fossil ammonite from Madagascar—an extraordinary addition to any fossil collection!