Description
Genuine Kossmaticeras Ammonite Fossil from Madagascar
This listing is for a genuine Kossmaticeras sp. ammonite fossil from the Campanian Stage of the Upper Cretaceous, discovered in Madagascar. Ammonites are among the most iconic and collectable fossils, prized for their coiled shells, fine ribbing, and importance in understanding ancient marine environments. This carefully selected fossil is the exact specimen shown in the photograph, making it ideal for fossil collectors, natural history enthusiasts, educational displays, or anyone interested in prehistoric marine life.
This fossil includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a genuine fossil specimen.
Species and Fossil Type
The fossil is identified as Kossmaticeras sp., an ammonite belonging to the extinct group of marine cephalopods that lived in the ancient seas during the Cretaceous Period. Ammonites were related to modern squid, cuttlefish, and nautilus, but they possessed external chambered shells. These shells were divided internally into chambers, with the animal living in the outermost body chamber while using the inner chambers for buoyancy control.
Kossmaticeras is a well-known Cretaceous ammonite genus, recognised for its ornamented shell form. Specimens often show strong ribbing across the whorls, and some examples display a complex shell pattern typical of many Late Cretaceous ammonites. These features make Kossmaticeras ammonites especially desirable as display fossils, as the shell structure clearly shows the elegant spiral form that makes ammonites so popular with collectors.
Geology and Age
This ammonite dates from the Campanian Stage of the Upper Cretaceous Period, making it approximately 83.6 to 72.1 million years old. During this time, much of the world was covered by warm shallow seas, and ammonites were abundant predators and active swimmers within marine ecosystems.
The Campanian was a time of rich marine biodiversity, with ammonites living alongside marine reptiles, fish, sharks, bivalves, gastropods, echinoids, and other invertebrates. Fossils from this stage are highly important because ammonites evolved rapidly, making many species useful for dating and correlating Cretaceous rock layers.
Location: Madagascar
Madagascar is famous for producing beautifully preserved Cretaceous ammonites, including many highly decorative and scientifically interesting species. Fossils from Madagascar are especially popular with collectors because they often preserve attractive shell detail, strong ribbing, and natural form. The island’s Cretaceous marine deposits record a time when parts of the region were covered by ancient seas connected to the Indian Ocean.
This Kossmaticeras ammonite represents part of that ancient marine world, preserved over millions of years as sediment gradually buried and fossilised the shell. Over geological time, mineral-rich waters helped preserve the original shell form, leaving behind a lasting record of a once-living marine cephalopod.
Morphology and Display Features
Kossmaticeras ammonites typically have a coiled planispiral shell with visible whorls, ribbing, and ornamental detail. The ribbed shell surface is one of the key visual features that makes this type of ammonite appealing for display. Depending on preservation, the fossil may show natural shell texture, growth lines, whorl shape, and the classic spiral geometry associated with ammonites.
As a display piece, this fossil offers strong visual appeal while also carrying genuine geological and palaeontological interest. It is suitable for collectors who specialise in Cretaceous fossils, ammonites, Madagascan fossils, fossil cephalopods, or natural history specimens.
Authenticity and Presentation
This is a genuine fossil specimen and comes with a Certificate of Authenticity lifetime guarantee generic card. The fossil has been carefully chosen for sale, and the photograph shows the actual specimen you will receive. This makes it a reliable choice for collectors who want to know exactly what they are purchasing.
Full sizing can be seen in the photo. This Kossmaticeras sp. ammonite is a highly collectable Upper Cretaceous fossil from Madagascar, combining scientific interest, natural history value, and attractive display quality in one authentic specimen.
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