Description
Proplanulites sp Ammonite Fossil – Genuine Middle Jurassic Specimen
This is a genuine Proplanulites sp. ammonite fossil from Rougemont, France. Dating to the Callovian stage of the Middle Jurassic, this specimen represents an attractive marine cephalopod from the ancient Jurassic seas of Europe. Proplanulites is a recognised ammonite genus known from Middle Jurassic deposits and is valued by fossil collectors for its classic coiled ammonite form, geological age, and connection to the rich marine ecosystems that flourished during the Jurassic Period.
This fossil is a carefully chosen specimen, with the photograph showing the actual fossil you will receive. It also includes a Certificate of Authenticity lifetime guarantee generic card, making it an excellent choice for fossil collectors, geology students, natural history displays, educational collections, and anyone interested in genuine Jurassic ammonites from France.
Geology, Age and Location
This ammonite comes from Rougemont, France, and is Callovian in age. The Callovian is the final stage of the Middle Jurassic, dating to approximately 166 to 164 million years ago. During this time, much of western Europe was covered by warm, shallow to moderately deep epicontinental seas. These seas created ideal conditions for a wide range of marine animals, including ammonites, belemnites, nautiloids, bivalves, brachiopods, gastropods, echinoids, crinoids, corals, fish, and marine reptiles.
France is especially well known for its Jurassic fossil deposits, with many regions preserving highly collectable ammonite faunas. Callovian ammonites are important in palaeontology because they are often used for biostratigraphy, helping geologists divide and correlate rock layers by age. A fossil from this interval therefore has both display appeal and scientific interest, representing a well-defined moment in Jurassic marine history.
Fossil Type and Species
Proplanulites sp. is an ammonite, an extinct marine cephalopod related to modern squid, cuttlefish, octopus, and nautilus. Ammonites had chambered shells divided internally by walls called septa. The living animal occupied the final outer chamber, while the earlier chambers helped control buoyancy as the animal moved through the water column.
Proplanulites belongs to the ammonite order Ammonitida and is associated with the superfamily Perisphinctoidea, a major Jurassic ammonite group. Members of this wider group are often recognised for their coiled shells, ribbed ornamentation, and importance in Middle and Upper Jurassic stratigraphy. The use of sp. indicates that the specimen is identified to genus level, making it accurately labelled while allowing for the natural variation and preservation limits often found in fossil ammonites.
Morphology and Collector Appeal
Proplanulites ammonites typically show the classic planispiral ammonite form, with the shell coiled in a flat spiral. Depending on preservation and growth stage, specimens may display rounded to compressed whorls, visible ribbing, a defined umbilicus, and natural chamber or internal mould detail. These features make ammonites highly popular with collectors because they combine attractive natural geometry with clear evidence of ancient life.
The ribbing on Jurassic ammonites is especially interesting, as it can reflect shell strength, growth pattern, hydrodynamics, and species-level variation. Even where fine detail is partly worn or naturally preserved as an internal mould, the overall coiled form remains instantly recognisable and visually appealing. A Callovian ammonite such as this offers strong educational value for explaining cephalopod evolution, fossilisation, Jurassic marine life, and the use of ammonites in geological dating.
Depositional Environment
During the Callovian, the area that is now France lay within a broad marine region connected to the Jurassic seas of Europe. Ammonites such as Proplanulites lived in the water column, using their chambered shells for buoyancy while feeding as active predators or scavengers. They shared the sea with many other marine organisms, forming part of a complex ecosystem that existed while dinosaurs lived on nearby landmasses.
After death, the ammonite shell could settle onto the seabed and become buried by sediment. Over millions of years, compaction, mineralisation, and geological change transformed the remains into a fossil. The resulting specimen is a direct record of a vanished Middle Jurassic sea and a tangible piece of natural history from deep geological time.
Authenticity and Display
All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. This Proplanulites sp. ammonite fossil is supplied with a lifetime guarantee generic COA card for confidence and peace of mind.
Full sizing: please see photo.
The fossil shown in the photograph is the actual specimen you will receive. This genuine Callovian Proplanulites ammonite from Rougemont, France is a superb addition to a fossil collection, natural history cabinet, geology teaching set, Jurassic display, or collection of genuine marine cephalopod fossils.
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