Description
Tissotia tissoti Ammonite Fossil – Santonian Upper Cretaceous, Morocco
This genuine Tissotia tissoti ammonite fossil is a fascinating Upper Cretaceous marine cephalopod specimen from Morocco, dating to the Santonian Stage, approximately 86 to 83 million years old. Ammonites are among the most iconic prehistoric fossils, instantly recognisable for their coiled shells and strong links to ancient marine environments. This carefully chosen fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card.
The photo shows the actual specimen you will receive, allowing collectors to view the fossil’s natural preservation, colour, shape and surface detail before purchase. Full sizing please see photo.
Geology and Age
Tissotia tissoti lived during the Santonian Stage of the Upper Cretaceous Period, a time when large areas of North Africa were covered by warm, shallow epicontinental seas. These marine environments supported a diverse ecosystem of ammonites, bivalves, gastropods, echinoids, fish, marine reptiles and other invertebrates. The fossil-bearing sediments of Morocco are internationally known for producing a wide range of Cretaceous marine fossils, often preserved in limestone, marl or phosphate-rich deposits depending on the specific locality.
During the Santonian, global sea levels were relatively high, creating extensive shallow seas around the margins of the ancient Tethys Ocean. Ammonites such as Tissotia were active swimming cephalopods, related to modern squid, octopus and cuttlefish. Their chambered shells helped regulate buoyancy, while the living animal occupied the outer body chamber and used tentacles to capture food.
Fossil Type and Species
This specimen belongs to the ammonite species Tissotia tissoti, a distinctive Cretaceous ammonite formally associated with the genus Tissotia. The species name is often attributed to Bayle, 1850. Tissotia is part of the ammonoid group within the order Ammonitida, a highly successful lineage of shelled cephalopods that evolved rapidly and became important index fossils for dating Mesozoic marine rocks.
Tissotia ammonites are known for their compact, strongly sculptured shell form. Depending on preservation and growth stage, specimens may show a relatively involute coiling style, defined whorl shape, ribbing, nodes or tubercles, and a robust external profile. These features made ammonites such as Tissotia well adapted to life in open marine waters, where shell strength, hydrodynamics and buoyancy control were essential.
Morphology and Collectable Features
This Tissotia tissoti fossil displays the classic appeal of a Cretaceous ammonite, with its naturally preserved coiled shell form and ancient marine character. Ammonites grew by adding new chambers as the animal increased in size, leaving behind a shell that records the life history of the organism. The visible surface may show natural ribbing, shell contours, sutural detail, mineral replacement, matrix contact or weathered texture, depending on the individual specimen.
Collectors value Tissotia ammonites for their scientific interest, attractive form and strong connection to the Upper Cretaceous seas of Morocco. Their distinctive shape makes them excellent display fossils for cabinets, educational collections, fossil study sets, geology classrooms and natural history displays.
Depositional Environment
This ammonite originated from ancient marine sediments laid down in warm Cretaceous seas. The environment would have been rich in carbonate muds, shell debris and organic material, supporting a broad range of marine life. After death, the ammonite shell settled onto the sea floor, where it was gradually buried by sediment. Over millions of years, mineral-rich groundwater replaced or infilled parts of the shell, preserving it as a fossil.
The Moroccan Upper Cretaceous deposits are especially significant because they preserve evidence of a highly productive marine ecosystem near the southern margins of the Tethys Ocean. Fossils from these rocks help illustrate the diversity of marine life shortly before the end-Cretaceous extinction event that eliminated the ammonites.
Authenticity and Display
This fossil is a genuine Tissotia tissoti ammonite specimen from Morocco and comes with a Certificate of Authenticity lifetime guarantee generic card. It has been selected as an individual natural history specimen, suitable for fossil collectors, geology enthusiasts, educational use or as a thoughtful gift for anyone interested in prehistoric marine life.
The fossil shown in the photo is the actual specimen you will receive. Full sizing please see photo.
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