Rare Nostoceras malagasyense Fossil Heteromorph Uncoiled Ammonite – Campanian, Upper Cretaceous, Belo Tsiribihina Madagascar – Genuine + COA

Description

A rare Nostoceras malagasyense Fossil Heteromorph Ammonite, from the Campanian Stage of the Upper Cretaceous, collected at Belo Tsiribihina, Madagascar. This ammonite is a striking representative of the heteromorph group, with its distinctive uncoiled shell form, making it highly collectable and scientifically significant. The fossil pictured is the exact specimen you will receive, supplied with a Certificate of Authenticity.

Fossil Type & Species:

• Type: Heteromorph Ammonite (extinct marine cephalopod)
• Species: Nostoceras malagasyense
• Order: Ammonitida
• Superfamily: Turrilitoidea
• Family: Nostoceratidae

Geological Context:

• Period: Cretaceous
• Epoch/Stage: Upper Cretaceous – Campanian (approx. 83.6 to 72.1 million years ago)
• Biozone: Associated with Campanian heteromorph ammonite faunas, important in global stratigraphic correlation
• Formation: Cretaceous marine sediments of Madagascar
• Depositional Environment: Shallow marine shelf rich in fine sediments, ideal for heteromorph ammonite preservation

Locality:

• Region: Belo Tsiribihina, Madagascar

Morphology & Features:

• Uncoiled heteromorph ammonite shell, forming irregular hook-like and spiral shapes
• Ornamented with strong ribbing across the shell
• Highly distinctive morphology typical of Nostoceras
• Excellent preservation of coiling and ribbing features

Scientific Notes:

• Nostoceras malagasyense is one of the most iconic heteromorph ammonites of the Campanian
• First described during systematic studies of Madagascan Cretaceous ammonites in the 20th century
• Its unusual uncoiled morphology provides valuable insights into ammonite evolution and palaeoecology

Notable Details:

• Rare Madagascan heteromorph ammonite with unique uncoiled shell structure
• Excellent preservation, highlighting ribbing and coiling
• 100% genuine, natural fossil – no restoration
• Scale Reference: Each square or cube = 1cm. Please see photos for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and professionally curated. Every purchase includes a Certificate of Authenticity. The fossil shown is the exact specimen you will receive.

This Nostoceras malagasyense heteromorph ammonite is a rare and scientifically important fossil from the Upper Cretaceous of Madagascar – an exceptional addition for collectors, researchers, or natural history displays.