Micracanthoceras Ammonite Fossil Tithonian Jurassic Cretaceous Russia Genuine Certified Specimen

Description

Authentic Micracanthoceras Ammonite Fossil from Russia

This is a genuine Micracanthoceras ammonite fossil originating from the Tithonian stage of the Late Jurassic to earliest Cretaceous, found in fossil-bearing strata of Russia. At an age of around 150 million years, this specimen captures an extraordinary chapter in Earth’s geological history. The fossil pictured is the exact specimen you will receive, shown with a 1 cm scale cube for accurate sizing. All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity, making it a trustworthy and highly desirable addition to any fossil collection.

Geological Age and Depositional Setting

The Tithonian stage (approximately 152–145 million years ago) marks the final stage of the Jurassic, just before the boundary with the Cretaceous. Sediments from this age in Russia represent shallow marine environments, where fine clays and carbonates preserved an abundance of marine life. Ammonites like Micracanthoceras were nektonic predators and scavengers, navigating open marine waters. Their fossil remains are now vital to palaeontology as biostratigraphic index fossils, used to correlate rock layers across different regions of Europe and Asia.

Scientific Classification

• Class: Cephalopoda
• Subclass: Ammonoidea
• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Ataxioceratidae
• Genus: Micracanthoceras

As part of the Ataxioceratidae family, Micracanthoceras belongs to a dynamic group of ammonites that were highly diverse during the Late Jurassic. Their evolutionary adaptations in shell morphology make them excellent for identifying specific horizons within the Tithonian stage.

Morphology and Distinctive Traits

The shell of Micracanthoceras is evolute, with its inner whorls visible and a wide umbilicus, creating a bold and open structure. Strong radial ribbing defines the flanks, often with spiny or tuberculate ornamentation along the ribs that add both strength and striking appearance to the shell. These ribs may bifurcate as they cross the whorl, leading to intricate patterns highly valued by collectors. The ornamental spines and ribbing not only reinforced the shell but also contributed to its hydrodynamic efficiency, enabling the animal to move effectively in open marine waters.

Palaeontological Significance

Micracanthoceras is of particular interest to palaeontologists because of its importance in biostratigraphy. Its widespread distribution across Europe, Russia, and other regions of the ancient Tethys Ocean makes it a key marker for identifying Upper Tithonian biozones. Fossils such as this illuminate the diversity and adaptability of ammonites in the Late Jurassic seas and help reconstruct ancient palaeoenvironments. The fossil record of this genus provides insights into evolutionary dynamics during a time of global environmental shifts, including sea-level changes and the transition into the Cretaceous period.

Collector and Display Value

This specimen of Micracanthoceras from Russia combines scientific importance with aesthetic appeal. The clearly visible ribbing and well-preserved form make it an attractive piece for display, while its classification as a Tithonian ammonite enhances its academic and collector value. Fossils from this genus are highly prized due to their distinct morphology, rarity, and role in defining the geological record of the Upper Jurassic.

This ammonite is not only a striking piece of natural history but also an educational tool and a valuable reference for palaeontologists, educators, and fossil enthusiasts alike. Whether added to a personal collection or used for teaching, this certified specimen offers a direct connection to life in the ancient seas of the Jurassic.

All of our fossils are guaranteed 100% genuine and supplied with a Certificate of Authenticity, ensuring that every specimen is both scientifically significant and a unique piece of natural history.