Orbignyceras trezeense Ammonite Fossil Upper Callovian Jurassic France COA

Description

Orbignyceras trezeense Ammonite Fossil from Montreuil-Bellay, France

This genuine Orbignyceras trezeense ammonite fossil comes from Montreuil-Bellay, Maine-et-Loire, France, and dates to the Upper Callovian Stage of the Middle Jurassic. It is a carefully chosen fossil specimen, supplied with a Certificate of Authenticity lifetime guarantee generic card. Full sizing can be seen in the photo, and the image shows the actual specimen you will receive.

Orbignyceras trezeense is a collectable Jurassic ammonite, valued for its distinctive shell form, scientific interest and excellent connection to classic French Middle Jurassic fossil localities. Specimens from Montreuil-Bellay are especially appealing to collectors of European ammonites, Callovian fossils, fossil cephalopods and natural history display pieces.

Species and Scientific Interest

Orbignyceras trezeense is an extinct ammonite species belonging to the ammonoid cephalopods, a group of marine molluscs related to modern squid, cuttlefish and nautilus. Ammonites lived in ancient seas and produced coiled, chambered shells. The animal occupied the final body chamber, while the earlier chambers were used for buoyancy control as it moved through the water column.

Orbignyceras is associated with the family Oppeliidae, a Jurassic ammonite group known for generally compressed, refined shell forms and detailed ornamentation. These ammonites are part of the order Ammonitida and are important in Jurassic palaeontology because they help identify and correlate sedimentary layers. The species name trezeense is linked with the well-known Middle Jurassic ammonite faunas of western France.

This specimen dates to the Upper Callovian, making it approximately 163 million years old. The Callovian was the final stage of the Middle Jurassic and is internationally recognised for diverse ammonite faunas. Ammonites from this interval are particularly useful as guide fossils because their shell forms changed through time and can be compared across different regions.

Upper Callovian Middle Jurassic Geology

During the Upper Callovian, much of western Europe was covered by warm, shallow epicontinental seas. These marine environments supported a rich ecosystem of ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids and other sea life. Sediments deposited on the sea floor later hardened into fossil-bearing strata, preserving shells and other remains in remarkable detail.

The Callovian Stage is especially important for ammonite biostratigraphy. Fossils such as Orbignyceras are part of the wider sequence of ammonite faunas used by geologists to date and compare Jurassic deposits. This makes the fossil valuable not only as an attractive natural display piece, but also as a specimen with strong geological and educational interest.

Locality: Montreuil-Bellay, Maine-et-Loire, France

Montreuil-Bellay in the Maine-et-Loire department of France is a classic locality for Middle Jurassic fossils. The area is well known among fossil collectors for Callovian ammonites, with fossil-bearing marine sediments that preserve a range of extinct sea life from the Jurassic Period. Specimens from this locality are desirable because they combine named scientific identity, strong geological context and attractive natural preservation.

French Jurassic ammonites are popular with collectors worldwide due to their variety, quality and historic scientific importance. A labelled specimen from Montreuil-Bellay adds excellent locality detail to a fossil collection and is ideal for anyone building a display of European ammonites, Middle Jurassic marine fossils or classic French fossil material.

Morphology and Display Features

Orbignyceras trezeense typically shows the elegant form associated with many oppeliid ammonites, with a coiled planispiral shell and refined whorl profile. Depending on preservation, specimens may show visible whorl structure, subtle ribbing, growth lines, smooth shell areas or natural surface detail. These features reflect the original shell architecture of the ammonite and give the fossil its scientific and display appeal.

The fossil may display natural cream, beige, grey, brown or iron-rich tones depending on the surrounding sediment and mineralisation. Natural variations in colour, texture, matrix and surface preservation are part of the specimen’s authenticity. These details make each fossil individual and suitable for display in a fossil cabinet, educational collection or labelled natural history arrangement.

Authenticity and Collector Appeal

This Orbignyceras trezeense ammonite is a genuine Upper Callovian Middle Jurassic fossil from Montreuil-Bellay, Maine-et-Loire, France. It includes a Certificate of Authenticity lifetime guarantee generic card, giving confidence to fossil collectors, geology enthusiasts, students and gift buyers.

With its named species, classic French locality, Middle Jurassic age and attractive ammonite form, this specimen would make an excellent addition to a Jurassic fossil collection, ammonite display, European fossil suite, natural history cabinet or educational geology collection.