Description
Genuine Denckmannia cf. pseudoerbaensis Ammonite Fossil
This listing is for a genuine Denckmannia cf. pseudoerbaensis ammonite fossil from the Upper Toarcian of the Lower Jurassic, collected from Ligrôn, near Thouars, Deux-Sèvres, France. This is a carefully chosen fossil specimen, selected for its natural character, geological interest, and appeal as a collectable European Jurassic ammonite. The photograph shows the actual specimen you will receive, allowing you to view the fossil’s preservation, shape, colour, matrix, visible detail, and overall appearance before purchase. For full sizing, please see the photo.
This fossil is supplied with a Certificate of Authenticity lifetime guarantee generic card, confirming that it is a genuine fossil specimen.
Fossil Type and Identification
Denckmannia cf. pseudoerbaensis is an ammonite, an extinct marine cephalopod related to modern squid, octopus, and cuttlefish. Ammonites lived in coiled, chambered shells and were highly successful animals in the ancient seas of the Mesozoic Era. Their shells were divided internally into chambers, which helped regulate buoyancy, while the living animal occupied the final body chamber.
The use of “cf.” in the scientific name means the specimen compares closely with Denckmannia pseudoerbaensis, while allowing for the natural variation and preservation differences often seen in fossil ammonites. This is a useful and honest palaeontological convention, especially for specimens where the visible features strongly resemble a known species but absolute species-level confirmation may depend on fine details of ribbing, whorl section, keel, sutures, or preservation.
Upper Toarcian Jurassic Geology
This ammonite dates from the Upper Toarcian Stage of the Lower Jurassic, making it approximately 174 to 182 million years old. The Toarcian was an important interval in Early Jurassic history, when much of western Europe was covered by warm, shallow epicontinental seas. These marine environments supported a rich ecosystem of ammonites, belemnites, bivalves, brachiopods, fish, and marine reptiles.
Ammonites such as Denckmannia are especially valued in geology because many species evolved quickly and were widespread across ancient seas. This makes them important fossils for dating and correlating Jurassic rock layers. A well-labelled Upper Toarcian ammonite from France is therefore both an attractive display fossil and a specimen with genuine scientific and stratigraphic interest.
Ligrôn, Thouars and Deux-Sèvres Fossil Locality
This fossil comes from Ligrôn, near Thouars, in Deux-Sèvres, France, an area associated with notable Jurassic fossil-bearing deposits. The region around Thouars is historically important in Jurassic stratigraphy, particularly for Toarcian rocks, which preserve evidence of ancient marine life from the Early Jurassic seas of western France.
The sediments that preserved ammonites from this region were deposited on ancient sea floors. After death, ammonite shells settled into soft marine sediment, where rapid burial could protect them from complete destruction. Over millions of years, compaction, mineral-rich groundwater, and natural chemical changes transformed these once-living shells into fossils.
Shell Form and Natural Features
Denckmannia ammonites display the classic coiled shell form typical of many Jurassic ammonites. Features such as whorl shape, ribbing, shell compression, and the overall curve of the shell are important in ammonite identification. These natural structures formed as the animal grew, with each new whorl recording part of its life history.
As a genuine fossil, this specimen may show natural characteristics such as mineral staining, matrix attachment, ancient surface wear, small chips, weathered areas, slight compression, or partial preservation. These features are normal for authentic fossil material and add to the individuality of the specimen. The fossil shown in the photo is the exact piece being offered, so all visible natural details can be inspected before purchase.
Collectable French Jurassic Display Specimen
This Denckmannia cf. pseudoerbaensis ammonite fossil is ideal for fossil collectors, geology students, educational collections, natural history displays, teaching resources, or anyone interested in genuine Jurassic marine fossils. Its combination of Upper Toarcian age, French locality, scientific labelling, and classic ammonite form makes it a strong addition to any fossil cabinet or display collection.
The specimen comes exactly as shown in the photo and includes a Certificate of Authenticity lifetime guarantee generic card, making it a reliable choice for collectors seeking a genuine Denckmannia ammonite, French Jurassic fossil, Upper Toarcian specimen, Thouars fossil, or authentic natural history display piece.
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