Description
Rare Dufrenoyia furcata Ammonite Fossil from Colombia
This listing presents a rare Dufrenoyia furcata ammonite fossil from the Lower Aptian stage of the Early Cretaceous period, discovered in the world-renowned fossil beds of Guane, Colombia. This remarkable specimen dates back approximately 125–113 million years, offering collectors, researchers, and enthusiasts the chance to own a genuine piece of Earth’s deep marine history. The ammonite shown in the photographs, complete with a 1 cm scale cube, is the exact specimen you will receive. Every fossil is carefully chosen, preserved with attention to detail, and comes with a Certificate of Authenticity.
Geological Context – Lower Aptian, Early Cretaceous
The Lower Aptian stage was a dynamic period in the Early Cretaceous, marked by warm climates, high sea levels, and the proliferation of diverse marine ecosystems. The Guane region of Colombia is world famous for its Lower Cretaceous deposits, yielding beautifully preserved ammonites, fish, and other marine fossils. These fossil-rich strata represent shallow marine environments where sediments accumulated in calm, oxygen-rich seas, ensuring exceptional preservation.
Ammonites from these layers are significant biostratigraphic markers, helping paleontologists correlate rock formations across continents. Dufrenoyia furcata is one such important species, found in Aptian biozones that provide crucial data for global stratigraphic frameworks.
Species Overview – Dufrenoyia furcata
Dufrenoyia furcata belongs to the Order Ammonitida, within the Superfamily Deshayesitoidea and Family Dufrenoyiidae. It is renowned for its distinctive shell morphology and evolutionary significance. Characteristic features of Dufrenoyia furcata include:
- Strongly ribbed whorls, with ribs branching into multiple prongs across the flanks.
- A moderately compressed, planispiral shell, making it elegant yet robust.
- Complex suture lines with deeply lobed and intricately folded patterns.
- Well-defined growth ornamentation, reflecting rapid shell development.
These features suggest that Dufrenoyia furcata was an active, free-swimming predator, inhabiting mid-water marine environments where it fed on small crustaceans, mollusks, and planktonic organisms.
Scientific and Collector Significance
As a fossil species, Dufrenoyia furcata is of high scientific importance, being an index fossil for parts of the Lower Aptian stage. Its distribution in deposits across Europe, Africa, and South America allows geologists to refine the stratigraphic record and gain insights into marine biodiversity during the Early Cretaceous.
For collectors, this ammonite holds significant rarity and value. Colombian ammonites are prized not only for their scientific utility but also for their aesthetic qualities, often exhibiting striking preservation of ribbing and suture patterns. Such fossils are coveted additions to both private and academic collections.
Aesthetic and Educational Value
Beyond its scientific role, this ammonite fossil is an exceptional natural display piece. The distinctive ribbing and branching costae make it a visually appealing specimen, perfect for collectors of natural history and paleontology enthusiasts. It also serves as an educational tool, helping students and museums illustrate ammonite diversity, adaptation, and evolutionary history during the Cretaceous.
Provenance and Classification
- Species: Dufrenoyia furcata
- Order: Ammonitida
- Superfamily: Deshayesitoidea
- Family: Dufrenoyiidae
- Age: Lower Aptian, Early Cretaceous (~125–113 million years ago)
- Locality: Guane, Colombia
Authentic Collector’s Fossil
This rare Dufrenoyia furcata ammonite fossil is a genuine piece of Earth’s history, preserved from the rich Cretaceous deposits of Colombia. With its unique ribbed shell, scientific importance, and guaranteed authenticity, this specimen makes a superb addition to any fossil collection, educational display, or natural history showcase. Every piece is supplied with a Certificate of Authenticity, confirming its status as a genuine fossil specimen.





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