RARE 7″ Euaspidoceras Fossil Ammonite | Callovian Jurassic | Maintirano Madagascar | Genuine with COA

Description

RARE: Euaspidoceras Fossil Ammonite (7″)

Geological Age: Callovian, Middle Jurassic (~166 to 163.5 million years ago)

Location Found: Maintirano Region, Western Madagascar

Fossil Type: Ammonite (Extinct Marine Cephalopod)

Genus: Euaspidoceras

Order: Ammonitida

Superfamily: Perisphinctoidea

Family: Aspidoceratidae

 

Specimen Overview:

This impressive 7-inch ammonite fossil belongs to the genus Euaspidoceras, a striking and highly collectable ammonite from the Callovian stage of the Middle Jurassic. It was discovered in the famous fossil-rich marine sediments of Maintirano, Madagascar, which are celebrated for their exceptional preservation and abundance of large, decorative ammonites.

The exact specimen in the photo is the one you will receive. A 1cm scale cube is included in the image to provide accurate sizing. Please see the photo for detailed measurements and preservation quality.

 

Geological Context & Depositional Environment:

During the Callovian, Madagascar lay along the margins of the ancient supercontinent Gondwana and was submerged beneath a warm, tropical sea. These shallow marine conditions allowed for the accumulation of fine-grained sediments, rich in calcium carbonate, which facilitated the fossilisation of marine life.

Fossils from the Callovian beds in the Maintirano region are typically found within limestone and marl deposits and include a wide range of well-preserved cephalopods, including perisphinctid and aspidoceratid ammonites.

 

Morphology & Notable Features:

Euaspidoceras is noted for its thick, robust shell with wide whorls, strong ribbing, and characteristic tubercles (knob-like projections) along the flanks and outer shell. These ornamented features give the ammonite a bold, sculptural appearance, distinguishing it from other Callovian genera.

This 7″ specimen displays classic Euaspidoceras morphology—broad flanks, a deep umbilicus, and prominent ribs terminating in strong tubercles—making it an excellent representative of the genus and a standout display fossil.

 

Authenticity & Guarantee:

All of our fossils are 100% genuine and come with a Certificate of Authenticity. This specimen has been carefully selected, professionally cleaned, and prepared to museum display standards.

 

Perfect For:

• Serious fossil and ammonite collectors
• Geological and palaeontological educators
• Museum-grade collections and scientific reference
• Natural history and interior décor enthusiasts

Add a rare and eye-catching piece of Jurassic marine history to your collection with this stunning Euaspidoceras ammonite fossil from the renowned fossil beds of Maintirano, Madagascar.