Fossil Ammonite Lobosphinctes intersertus Lower Callovian Jurassic France Authentic Collectors Specimen with COA

Description

Authentic Fossil Ammonite from France

This listing is for a genuine fossil ammonite, Lobosphinctes intersertus, discovered in the Lower Callovian stage of the Middle Jurassic (approximately 166–163 million years ago) from France. This specimen has been carefully selected for its preservation, scientific importance, and visual appeal. The fossil pictured is the exact one you will receive. Scale rule squares / cube = 1 cm – please see photographs for accurate sizing. All of our fossils are 100% genuine specimens, supplied with a Certificate of Authenticity to ensure confidence in your purchase.

Geological Context: Lower Callovian, Jurassic

The Callovian stage is an important interval of the Middle Jurassic, marking a time of widespread marine environments across Europe. In France, the Callovian is particularly well represented by fossil-rich marine clays and limestones that were deposited in shallow seas connected to the Tethys Ocean.

The Lower Callovian is significant in paleontology due to the abundance of ammonites that define numerous biozones. These ammonites are used as index fossils, providing essential tools for dating and correlating rock layers across different regions. Fossils such as Lobosphinctes intersertus are particularly important for establishing stratigraphic frameworks in Jurassic geology.

The Species: Lobosphinctes intersertus

Lobosphinctes intersertus belongs to the order Ammonitida, superfamily Perisphinctoidea, and family Perisphinctidae. Ammonites of this genus are recognised for their planispiral shells with strong ribbing and complex suture lines. The ribs are typically pronounced and may bifurcate across the whorls, giving the fossil a bold and striking appearance.

This species was a nektonic predator, actively swimming in Jurassic seas and feeding on small marine organisms such as crustaceans, molluscs, and fish. Its robust shell provided buoyancy and protection, while its ribbed morphology may have contributed to strengthening the structure against pressure in open waters.

As a diagnostic ammonite of the Lower Callovian, Lobosphinctes intersertus is widely used as a biozonal marker, making it vital for stratigraphic and paleontological studies.

Morphological and Scientific Features

• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Perisphinctidae
• Genus and Species: Lobosphinctes intersertus
• Geological Stage: Lower Callovian, Middle Jurassic (c. 166–163 Ma)
• Locality: France
• Shell Traits: Strong ribbing, planispiral form, bifurcating ribs, detailed suture lines
• Scientific Significance: Important index fossil for Callovian stratigraphy and biozones

The clearly defined ornamentation of Lobosphinctes intersertus makes it both a visually appealing collector’s item and a scientifically valuable fossil, contributing to our understanding of Jurassic ammonite diversity.

Collector and Display Value

Ammonites are among the most iconic and collectible fossils, with Lobosphinctes intersertus being especially prized due to its role as an index fossil for the Lower Callovian. Fossils from France are internationally respected for their quality and scientific importance, making this specimen desirable for both collectors and researchers.

This ammonite combines aesthetic display value with historical and scientific significance. Its bold ribbing and classic coiled form highlight the beauty of natural history while also serving as a direct link to the marine ecosystems of the Jurassic period.

All of our specimens are carefully chosen, handled with care, and supplied with a Certificate of Authenticity. This Lobosphinctes intersertus ammonite is a genuine and striking piece of Earth’s deep history, perfect for collectors, educational use, or display.