Darellia sp Ammonite Fossil Jurassic France Genuine COA Bajocian Thouars Deux-Sevres Collectable Natural History Display

Description

Genuine Darellia sp. Ammonite Fossil

This listing is for a genuine Darellia sp. ammonite fossil from Thouars, Deux-Sèvres, France. Dating to the Middle Jurassic, Bajocian Stage, this carefully chosen fossil represents an authentic marine cephalopod from one of western Europe’s classic Jurassic fossil regions. The photograph shows the actual specimen you will receive, allowing you to view the fossil’s natural preservation, shape, surface detail, colour, matrix and overall character before purchase.

This fossil is supplied with a Certificate of Authenticity lifetime guarantee generic card, confirming that it is a genuine specimen. Full sizing details can be seen in the photo.

Fossil Type and Genus

Darellia sp. is an ammonite, part of an extinct group of shelled marine cephalopods related to modern squid, octopus and cuttlefish. Ammonites lived in ancient seas and are among the most iconic fossils of the Jurassic Period, admired for their spiral shells and valued scientifically for their importance in dating and comparing ancient rock layers.

The shell of an ammonite was divided into internal chambers. The living animal occupied the final body chamber, while earlier chambers helped regulate buoyancy in the water column. As the ammonite grew, it added new chambers to the shell, producing the familiar coiled form that makes ammonites instantly recognisable to fossil collectors.

The “sp.” designation means this fossil has been identified to genus level as Darellia, while the exact species is left open. This is common with fossil ammonites where natural preservation, matrix coverage, wear or shell variation makes a confident species-level identification less certain. As a named genus from a well-known Jurassic locality, this specimen still has strong geological and collecting appeal.

Middle Jurassic Bajocian Age

This ammonite dates from the Bajocian Stage of the Middle Jurassic, approximately 170 million years old. The Bajocian was an important interval in ammonite evolution, with many distinctive forms appearing across the shallow seas of Europe. Ammonites from this time are especially valued because their rapid evolution and wide distribution make them useful guide fossils for biostratigraphy.

During the Bajocian, the area now forming western France was covered by warm marine waters. These Jurassic seas supported a rich ecosystem of ammonites, belemnites, bivalves, brachiopods, gastropods, crinoids, fish and other marine life. Fine sediments and carbonate-rich deposits accumulated on the sea floor, eventually preserving the remains of marine animals as fossils.

Thouars, Deux-Sèvres Locality

Thouars in Deux-Sèvres, France is an important fossil area with a long association with Jurassic geology. The region is widely recognised for marine fossil-bearing strata and has produced ammonites and other invertebrates from the ancient seas of western Europe. A labelled fossil from Thouars is especially attractive to collectors because it combines a precise French locality with a clear Middle Jurassic age.

French Jurassic ammonites are popular with collectors because they provide excellent comparison material alongside British, German and other European ammonite faunas. A specimen from Thouars is suitable for anyone building a collection focused on European Jurassic fossils, Bajocian ammonites, ammonite evolution or natural history display pieces.

Ammonite Morphology and Natural Features

Darellia ammonites are generally associated with compact, coiled shells and fine to moderate ribbing, depending on preservation and individual growth stage. Visible features may include planispiral coiling, whorl curvature, ribbed ornament, shell outline, chamber traces, mineralisation, natural matrix and surface texture. These details reflect both the original shell structure of the animal and the fossilisation process that preserved it for millions of years.

As a genuine natural fossil, each specimen is unique. Variations in colour, surface detail, matrix, compression, edge preservation, mineral staining and overall appearance are part of the fossil’s individual character. These natural features make the piece a distinctive example of ancient Jurassic marine life rather than a manufactured or mass-produced display item.

Collecting and Display Appeal

This Darellia sp. ammonite fossil is ideal for collectors of Jurassic ammonites, French fossils, Bajocian fossils, European fossils, Middle Jurassic ammonites and natural history specimens. It would make an excellent addition to a fossil cabinet, educational geology collection, school display, study set or natural history gift.

The fossil has been carefully chosen and photographed so that the buyer can clearly see the actual specimen being supplied. Its appeal comes from the combination of genuine authenticity, classic ammonite form, Middle Jurassic age, named genus and desirable French locality.

Authenticity and Presentation

This is a 100% genuine fossil specimen and includes a Certificate of Authenticity lifetime guarantee generic card. The listing photograph shows the actual specimen you will receive, and full sizing can be checked from the photo. The fossil is suitable for display, study, collecting or gifting.