Description
Genuine Hyperlioceras Ammonite Fossil
This genuine ammonite fossil is identified as Hyperlioceras discites and comes from Upper Aalenian rocks in Doubs, Département 25, Bourgogne-Franche-Comté, France. It is a carefully selected Middle Jurassic specimen with valuable species, age, and locality information. The fossil is well suited to an ammonite collection, geological display, teaching set, or gift for someone interested in authentic fossils and prehistoric marine life. The photographs show the exact specimen offered for sale, so the piece pictured is the piece you will receive.
Hyperlioceras discites is an extinct marine cephalopod recognised from Jurassic strata. Its coiled shell grew by adding progressively larger chambers around the outer whorl. The living animal occupied the final body chamber, while the older sealed chambers helped regulate buoyancy in the water. Ammonites were relatives of living cephalopods such as squid, cuttlefish, and nautiluses, but they belonged to an extinct group that disappeared at the end of the Cretaceous Period.
Upper Aalenian Geological Age
The Aalenian is an early stage of the Middle Jurassic. During this interval, marine environments supported diverse ammonite communities whose shells became preserved in layers of sediment. Ammonites evolved rapidly and were distributed across broad marine areas, making them particularly important to geologists for comparing rock units and establishing relative ages.
The supplied Upper Aalenian age gives this fossil a clear position within the Jurassic succession. A specimen with documented stratigraphic information is more than a decorative object: it is a physical record of an ancient marine ecosystem and a useful example of how fossil assemblages help scientists interpret geological time.
Doubs, Bourgogne-Franche-Comté
Doubs lies in eastern France within the Bourgogne-Franche-Comté region. Jurassic sedimentary rocks in this wider area formed from material deposited in ancient seas. Fine sediment accumulated on the sea floor, burying shells and other remains. Over immense spans of time, compaction and mineralisation transformed those deposits into rock and preserved fossils within them.
The specimen’s natural colour, matrix, texture, and any small irregularities reflect this geological history. These are genuine characteristics of an ancient fossil rather than features of a manufactured replica. The locality information also makes the piece appealing to collectors who organise specimens by European region or classic Jurassic occurrence.
Shell Form and Collectable Detail
Hyperlioceras ammonites are studied through the proportions and ornamentation of their coiled shells. Please inspect the photographs for the visible whorls, ribbing, shell outline, and preserved surface detail on this individual specimen. Differences in rib strength, whorl expansion, and outer-shell form can be important when comparing ammonite species.
Every fossil preserves a different part of the original shell and its surrounding sediment. Natural breaks, mineral veins, changes in colour, or areas of matrix are part of the specimen’s authenticity and geological character. The multiple photographs provide a clear view of the actual fossil from useful angles and show its condition more accurately than a generic description alone.
Exact Specimen, Size and Authenticity
Full sizing is shown in the photographs, which should be used for the most accurate scale and proportion of this individual piece. The images are not stock photographs and do not represent a similar example. They show the exact Hyperlioceras discites ammonite fossil that will be supplied.
This is a genuine fossil specimen and includes a generic Certificate of Authenticity card with a lifetime guarantee. It has been carefully chosen for its identifiable ammonite form, Upper Aalenian age, French provenance, and natural visual interest. It makes a distinctive addition to a cabinet collection, educational display, office, study, or Jurassic fossil gift.
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