Description
This listing features a RARE 6″ Fossil Ammonite – Reineckeia (Reineckeia) anceps anceps, a well-preserved and scientifically significant specimen from the Middle Jurassic (Callovian Stage), found near Poitiers, France. This ammonite is a member of the family Reineckeiidae, with key zonal importance, and is highly collectible for its distinctive morphology and stratigraphic precision.
As with all our fossils, this is a 100% genuine specimen, hand-picked for its preservation and display quality, and comes with a Certificate of Authenticity. You will receive the exact fossil shown in the photos. Please refer to the photo with the 1cm scale cube for full sizing.
Fossil Overview:
- Species: Reineckeia (Reineckeia) anceps anceps
- Common Name: Fossil Ammonite
- Geological Period: Jurassic
- Stage: Middle Callovian (~165 million years ago)
- Biozone: Reineckeia anceps Zone (ammonite-based zonation)
- Location: Poitiers, France
- Size: Approx. 6 inches (15.2 cm)
Geological & Depositional Environment:
During the Middle Jurassic, the Poitiers region was submerged under a warm, shallow epicontinental sea. Sediments deposited in this marine environment were typically marly and clay-rich, with low energy conditions that promoted excellent fossil preservation. These strata are part of the global Callovian sequence, well-known for diverse ammonite faunas.
The genus Reineckeia is a key marker fossil, particularly in defining biostratigraphic boundaries within the Callovian.
Taxonomy & Classification:
- Phylum: Mollusca
- Class: Cephalopoda
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Reineckeiidae
- Genus: Reineckeia
- Subgenus: Reineckeia (Reineckeia)
- Species: anceps anceps
Morphological Features:
This specimen exhibits:
- A strongly ribbed, involute shell
- Dense bifurcating ribs that radiate from the umbilical shoulder
- Rounded venter and well-defined whorls
- Prominent ornamentation and good symmetry
These features are characteristic of an active, nektonic swimmer in open marine environments.
Notable Aspects:
- Index fossil for the Reineckeia anceps ammonite zone
- Excellent condition and rare size
- Ideal for collectors, educators, and museums
- A striking example of mid-Jurassic ammonite evolution and biodiversity
Why Buy From Us?
- All fossils are 100% genuine specimens
- Supplied with a Certificate of Authenticity
- You receive the exact item pictured
- Professionally packaged and promptly shipped
Enhance your fossil collection with this exceptional Reineckeia anceps anceps ammonite – a beautiful relic of Earth’s Jurassic oceans and a true collector’s piece.
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