Rare Fossil Ammonite Sigaloceras enodatum Genuine Jurassic Callovian Germany

Description

Rare Fossil Ammonite – Sigaloceras enodatum from Germany

This listing offers a rare and scientifically significant Fossil Ammonite of the species Sigaloceras enodatum from the Callovian stage of the Jurassic Period, discovered near Gruibingen, Germany. Dating back approximately 164–161 million years, this ammonite represents a fascinating snapshot of the rich marine ecosystems that flourished during the Middle Jurassic. It is an exceptional piece for collectors and enthusiasts seeking a specimen that combines geological importance with striking natural beauty.

The Species – Sigaloceras enodatum

Sigaloceras belongs to the Order Ammonitida, Superfamily Stephanoceratoidea, and Family Stephanoceratidae. The species enodatum is particularly valued by paleontologists for its distinct shell morphology, which includes ribbing patterns that often become smoother or even absent (enodate) on later whorls, a characteristic that inspired its species name. Its strong evolutionary ties within the Stephanoceratidae highlight its role in Jurassic ammonite diversity. Fossils such as this one are not only sought after for their aesthetic appeal but also for their role as index fossils, crucial in dating and correlating Jurassic strata across Europe.

Geological Context – Callovian, Jurassic Period

This specimen comes from the Callovian stage, a subdivision of the Middle Jurassic approximately 164–161 million years ago. The rocks around Gruibingen, in the Swabian Jura of Germany, are famous for their well-preserved ammonites and marine fossils. During this time, the region was covered by a warm shallow epicontinental sea, part of the larger Tethys Ocean system. Fine marine sediments accumulated on the sea floor, creating perfect conditions for fossil preservation. These layers have yielded world-renowned ammonite assemblages that provide vital insights into Jurassic paleoenvironments.

Morphological Features

This Sigaloceras enodatum ammonite fossil displays several hallmark traits of the species:

• Planispiral shell coiling, a symmetrical spiral structure typical of ammonites.
• Primary ribbing across the inner whorls, becoming smoother toward the outer whorls.
• Compressed whorl section with well-defined growth lines.
• Suture patterns visible in parts of the specimen, showing the intricate junctions between shell chambers, a distinctive feature of ammonites within the Stephanoceratidae family.

The fossil is displayed with a scale cube of 1 cm, providing accurate measurements in the accompanying photographs. What you see in the images is the exact specimen you will receive, chosen for its quality and scientific value.

Scientific and Collecting Significance

Ammonites such as Sigaloceras enodatum serve as biostratigraphic markers, allowing geologists to identify and correlate specific intervals of the Jurassic period. The Callovian stage is divided into ammonite biozones, and Sigaloceras plays an important role in defining these intervals. Collectors particularly value this species for its rarity outside of well-documented German deposits, making this specimen a highly desirable piece.

Authenticity and Provenance

• Locality: Gruibingen, Swabian Jura, Germany.
• Age: Callovian, Jurassic (~164–161 million years ago).
• Family: Stephanoceratidae
• Order: Ammonitida

All of our fossils are guaranteed 100% genuine specimens. Each piece is accompanied by a Certificate of Authenticity, providing complete peace of mind for collectors.

Why This Fossil Stands Out

• A rare ammonite species from a classic German locality.
• Well-preserved with diagnostic features of Sigaloceras enodatum.
• A scientifically valuable specimen that also makes an impressive display piece.
• Supplied with a Certificate of Authenticity, ensuring its genuineness.

This rare Callovian ammonite fossil offers both scientific significance and natural elegance, making it an outstanding addition to any fossil collection or educational display.