Description
This listing features a RARE 14″ Lewesiceras peramplum fossil ammonite, an extraordinary and sizable chalk ammonite from the Turonian Stage of the Late Cretaceous, discovered at Penly Biville Sur Mer, Normandy, France. This specimen originates from the renowned Alice Purnell Collection, known for its scientifically curated and visually striking fossil specimens.
Geological Context:
- Fossil Type: Ammonite (extinct marine cephalopod)
- Species: Lewesiceras peramplum
- Stage: Lower–Middle Turonian (Cretaceous, approx. 93–90 million years ago)
- Location: Penly Biville S Mer, Normandy, France
- Depositional Environment: Marine chalk platform – deep, low-energy shelf seas conducive to carbonate mud deposition and exceptional preservation of calcareous fossils
Scientific Classification:
- Order: Ammonitida
- Superfamily: Desmoceratoidea
- Family: Desmoceratidae
Morphology & Notable Features:
- Lewesiceras peramplum is noted for its massive, involute shell with broad whorls and prominent ribbing. The ribs are typically strong, slightly sinuous, and curve gently forward on the outer flanks.
- This exceptional 14″ specimen displays well-defined sculpturing and preservation of chalk matrix, making it a rare display fossil.
- Highly valued for both its scientific relevance and its aesthetic, collector-grade quality.
Palaeontological Significance:
This species is a key biostratigraphic marker for the Lower to Middle Turonian biozones and has been used in zonal schemes correlating across Western Europe.
All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
Scale Rule Squares / Cube = 1cm: Full sizing please see photo. The fossil shown is the exact specimen you will receive—sourced with care from the Alice Purnell Collection.
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