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Rare Nostoceras malagasyense Fossil Heteromorph Uncoiled Ammonite – Campanian, Upper Cretaceous, Belo Tsiribihina Madagascar – Genuine + COA
£52.80
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.
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.
Additional information
Era
Cretaceous
Origin
Madagascar
Cretaceous Information
The Cretaceous Period (145–66 million years ago) was the final era of the Mesozoic, marked by the dominance of dinosaurs and the rise of flowering plants. It had a warm, greenhouse climate, with high sea levels that created vast shallow inland seas. Marine life flourished, including mosasaurs, ammonites, and rudist reefs, while the land was ruled by iconic dinosaurs like Tyrannosaurus rex, Triceratops, and Spinosaurus. Mammals and birds diversified, and insects thrived. The period ended with the mass extinction event, likely caused by an asteroid impact, wiping out the dinosaurs and paving the way for the rise of mammals in the Cenozoic.
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