Description
Rehmannia sp. Ammonite Fossil from Saint-Léger, Vienne, France
This genuine Rehmannia sp. ammonite fossil comes from Saint-Léger, Vienne, France, and dates to the Callovian Stage of the Middle Jurassic. It is a carefully chosen fossil specimen, supplied with a Certificate of Authenticity lifetime guarantee generic card. Full sizing can be seen in the photo, and the image shows the actual specimen you will receive.
Rehmannia ammonites are collectable Middle Jurassic marine fossils, valued for their distinctive ribbed shell form, scientific interest and attractive display character. Specimens from French Jurassic deposits are especially appealing to collectors who focus on European ammonites, Callovian fossils, classic Jurassic marine life and well-preserved fossil cephalopods.
Species and Scientific Interest
Rehmannia is a genus of ammonite belonging to the extinct marine cephalopods, a group related to modern squid, cuttlefish and nautilus. Ammonites lived in ancient seas and built coiled chambered shells, with the animal occupying the final body chamber while earlier chambers helped control buoyancy. Their shells are among the most recognisable and important fossils of the Jurassic Period.
Rehmannia sp. is generally associated with the Callovian Stage of the Middle Jurassic, making this specimen approximately 163 to 166 million years old. Ammonites of this age are important in palaeontology because they evolved rapidly and are widely used for biostratigraphy, helping geologists date and correlate Jurassic rock layers across different regions.
The “sp.” after the genus name means the specimen is assigned to the genus Rehmannia, while the precise species is not specified. This is a standard scientific way of labelling fossils when the genus can be identified but the exact species-level assignment is left open.
Middle Jurassic Callovian Geology
The Callovian Stage represents the later part of the Middle Jurassic, a time when large areas of Europe were covered by warm shallow seas. These marine environments supported a rich variety of life, including ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids and marine reptiles. Fine sediments deposited on the sea floor helped preserve shells and other hard parts, creating fossil-rich Jurassic strata.
Ammonites from the Callovian are particularly useful as index fossils because their shell forms changed through time. This makes them valuable for understanding the age and sequence of sedimentary deposits. Rehmannia is part of this broader Middle Jurassic ammonite record and represents the diverse cephalopod faunas that occupied European seas during the Callovian.
Locality: Saint-Léger, Vienne, France
Saint-Léger in the Vienne department of western France lies within a region known for Jurassic sedimentary rocks and fossil-bearing marine deposits. During the Middle Jurassic, this part of France was influenced by shallow marine conditions, where carbonate and clay-rich sediments accumulated across the sea floor. These deposits preserved a range of marine fossils, including ammonites that are now collected for both scientific and display purposes.
French Jurassic ammonites are highly regarded by collectors because many localities preserve strong ribbing, attractive shell detail and classic ammonite forms. A labelled specimen from Saint-Léger, Vienne, adds useful locality information to a fossil collection and is particularly suitable for collectors building a regional, European or Middle Jurassic ammonite display.
Morphology and Display Features
Rehmannia ammonites typically show a coiled planispiral shell with visible whorls and ribbed ornamentation. The ribs formed part of the original shell sculpture and may have helped strengthen the shell during life. Depending on preservation, specimens may display natural earthy, cream, grey, brown or iron-rich tones, with contrast between the ammonite and surrounding matrix.
This specimen has been selected for its display appeal and geological interest. Natural variations in colour, surface detail, preservation and matrix are part of its authenticity and help give each fossil its own character. As the photo shows the actual specimen you will receive, it is ideal for collectors who prefer individual, photographed fossils rather than generic stock images.
Authenticity and Collector Appeal
This Rehmannia sp. ammonite is a genuine Callovian Middle Jurassic fossil from Saint-Léger, Vienne, France. It includes a Certificate of Authenticity lifetime guarantee generic card, giving confidence to fossil collectors, geology enthusiasts, students and gift buyers.
With its Middle Jurassic age, French locality, attractive ammonite form and scientific connection to Callovian marine life, this fossil would make an excellent addition to a Jurassic ammonite collection, fossil display cabinet, educational geology collection or European fossil suite.
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