Description
Genuine Ataxioceras subinvolutum Ammonite Fossil from Oberlangheim, Bavaria
A genuine Ataxioceras subinvolutum ammonite fossil from Oberlangheim, Franconian Alps, Bavaria, Germany, dating to the Upper Jurassic, specifically the Kimmeridgian, Malm Gamma 2. This carefully chosen fossil represents a finely labelled European Jurassic ammonite from a classic German fossil region, preserved from ancient marine sediments laid down approximately 152 to 157 million years ago.
This fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card. Full sizing can be seen in the photo, and the photograph shows the actual specimen you will receive. It is an excellent choice for collectors of ammonites, German fossils, Upper Jurassic marine life, stratigraphically labelled specimens, and natural history display pieces.
Fossil Type and Species Information
Ataxioceras subinvolutum is an ammonite, an extinct marine cephalopod related to modern squid, cuttlefish, and nautilus. Ammonites lived in ancient seas and possessed coiled, chambered shells. The living animal occupied the outer body chamber, while the internal chambers helped regulate buoyancy as it moved through the water column.
The genus Ataxioceras is well known from the Upper Jurassic of Europe and is particularly associated with Kimmeridgian marine deposits. Ataxioceras ammonites are often recognised by their coiled shell form, ribbed ornamentation, and variable whorl shape. Depending on preservation, specimens may show branching or curved ribs, a defined umbilicus, whorl overlap, and the characteristic shell geometry used by palaeontologists for identification.
Ataxioceras belongs to the ammonite family Ataxioceratidae, within the superfamily Perisphinctoidea and the order Ammonitida. The species subinvolutum is especially appealing to collectors because it represents a named ammonite taxon from a well-known Late Jurassic European succession.
Upper Jurassic Kimmeridgian Age
This specimen comes from the Kimmeridgian Stage of the Upper Jurassic, a time when ammonites were abundant, diverse, and highly important in marine ecosystems. During the Kimmeridgian, much of southern Germany was covered by warm shallow seas connected to wider European marine basins. These waters supported ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, fish, and marine reptiles.
Ammonites are among the most important fossils for dating Jurassic rocks because they evolved rapidly and were widely distributed across ancient seas. Their distinctive shell forms allow geologists to divide the Jurassic into detailed zones and horizons. A labelled Ataxioceras subinvolutum from the Kimmeridgian therefore has both strong display value and genuine scientific interest.
Malm Gamma 2 and German Jurassic Stratigraphy
The term Malm Gamma 2 refers to a subdivision within the Upper Jurassic Malm succession of southern Germany. The Malm sequence is famous for its fossiliferous limestone and marl deposits, which record Late Jurassic marine conditions across Bavaria and surrounding regions. These rocks have produced a wide range of ammonites and other marine fossils, making them highly valued by collectors and researchers.
Malm Gamma 2 material is particularly interesting because it gives the specimen a more precise stratigraphic position within the broader Kimmeridgian interval. This level of geological detail increases the appeal of the fossil for collectors who appreciate accurate locality and age information.
Oberlangheim and the Franconian Alps
Oberlangheim, in the Franconian Alps of Bavaria, lies in a region renowned for Jurassic fossil-bearing strata. During the Late Jurassic, this area formed part of a carbonate-rich marine environment where shells and skeletal remains accumulated on the seabed. Over millions of years, these sediments were compacted and mineralised, preserving ammonites and other marine organisms as fossils.
The Franconian Alps are especially important in German geology because they expose classic Jurassic successions. Fossils from this region are collectable not only for their appearance but also for their connection to one of Europe’s best-known Mesozoic geological landscapes.
Morphology and Collector Appeal
Ataxioceras subinvolutum is admired for its classic ammonite shape and natural ribbed shell ornamentation. The specimen may display a coiled planispiral form, visible whorl structure, ribbing, and surface detail that reflects the original shell architecture of a Late Jurassic cephalopod. These features make it a desirable display fossil for both beginners and experienced collectors.
This fossil would suit a fossil cabinet, study, classroom collection, museum-style display, or European Jurassic fossil collection. Its combination of named species, Upper Jurassic age, Kimmeridgian stage, Malm Gamma 2 stratigraphy, and Bavarian provenance gives it strong educational and collector value.
Authenticity and Specimen Details
This is a genuine Ataxioceras subinvolutum ammonite fossil from the Upper Jurassic, Kimmeridgian, Malm Gamma 2, collected from Oberlangheim, Franconian Alps, Bavaria, Germany. It includes a Certificate of Authenticity lifetime guarantee generic card.
The fossil shown in the photograph is the actual carefully chosen specimen you will receive. Full sizing can be seen in the photo, allowing buyers to view the true scale, preservation, shape, and display character of this authentic German Jurassic ammonite.
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