Rare Simbirskites concinnus Ammonite Fossil from Upper Hauterivian Cretaceous Nordich Germany Authentic Specimen

Description

Geological Context and Provenance

This rare specimen is a genuine Simbirskites concinnus fossil ammonite from the Upper Hauterivian Stage of the Early Cretaceous Period, approximately 132 – 129 million years ago. It originates from Nordich, Germany, a classic fossil locality known for its richly fossiliferous Lower Cretaceous deposits. These sediments formed in shallow marine environments that were part of the northern margin of the ancient Tethys Ocean, preserving ammonites in remarkable condition.

The Hauterivian Stage is one of the key intervals within the Early Cretaceous, marking an important phase in ammonite diversification. Fossils from Germany are especially valued for their preservation and for their role in refining stratigraphic frameworks across Europe. Ammonites like Simbirskites concinnus are central to this record, as they serve as highly useful index fossils.

Fossil Type and Species Information

Simbirskites concinnus belongs to the Order Ammonitida, Superfamily Perisphinctoidea, and Family Simbirskitidae. The genus Simbirskites is particularly significant in Early Cretaceous ammonite biostratigraphy, and the species concinnus is one of its most recognisable forms.

This ammonite is notable for its distinctive shell morphology, which makes it valuable not only for scientific study but also for collectors. Its well-documented stratigraphic range ensures that it continues to be used in geological studies to correlate Hauterivian strata across multiple regions of Europe.

Morphological Features and Identification

This specimen displays the classic features of Simbirskites concinnus. The shell is relatively involute, with strongly defined ribbing that extends across the flanks and onto the venter. The ribs are straight to slightly curved, creating a bold and ornamental appearance. The whorls are compact and proportionate, forming a beautifully coiled structure.

The ribbing served both structural and hydrodynamic purposes. It reinforced the shell against water pressure and predation, while its streamlined coiling improved swimming efficiency. Like other ammonites, Simbirskites used its chambered shell to regulate buoyancy, allowing it to move actively within the marine water column as a nektonic predator.

Depositional Environment

During the Upper Hauterivian, the Nordich region of Germany was covered by shallow seas connected to the Tethys Ocean. Sedimentation consisted mainly of limestones and marls, which provided ideal conditions for the fossilisation of ammonites. These deposits are well known for preserving ammonites with exceptional detail, from ribbing patterns to suture lines.

The marine ecosystem was diverse and dynamic, hosting ammonites, belemnites, bivalves, gastropods, and marine reptiles. Ammonites such as Simbirskites concinnus played an important role in this food web, preying on small invertebrates and plankton while being preyed upon by larger reptiles and fish. Their abundance and variation make them vital for reconstructing the ecology of Early Cretaceous seas.

Collector Appeal and Authenticity

This Simbirskites concinnus ammonite fossil is a rare and scientifically valuable specimen from one of Germany’s most notable Early Cretaceous fossil localities. Its elegant ribbing, excellent preservation, and historical significance make it a prized piece for collectors and natural history enthusiasts.

• 100% Genuine Specimen – All of our fossils are authentic and include a Certificate of Authenticity.
• Exact Fossil Shown – The photographs depict the actual specimen you will receive.
• Scale Reference – Scale rule squares / cube = 1 cm. Please see photos for accurate sizing.

This carefully selected Simbirskites concinnus fossil ammonite provides a tangible connection to the Upper Hauterivian seas of Early Cretaceous Germany. With its combination of rarity, scientific significance, and striking natural beauty, it makes a superb addition to any fossil collection or educational display.