Description
PTEROLYTOCERAS madagascariensis Fossil Ammonite – Tithonian Stage, Late Jurassic Period, Mandarana, Madagascar
An elegant and scientifically notable ammonite fossil, this specimen of Pterolytoceras madagascariensis originates from the Tithonian stage of the Late Jurassic, approximately 152 to 145 million years ago. Recovered from the well-known fossil beds near Mandarana, Madagascar, this ammonite reflects the diversity and complexity of marine life during the closing stages of the Jurassic Period.
Fossil Type & Species:
- Type: Invertebrate Fossil (Ammonite Shell)
- Species: Pterolytoceras madagascariensis
- Order: Ammonitida
- Superfamily: Lytoceratoidea
- Family: Lytoceratidae
- Described by: de Grossouvre, late 19th century
Geological & Stratigraphic Details:
- Location: Mandarana, Madagascar
- Geological Stage: Tithonian (Late Jurassic)
- Age: ~152–145 million years ago
- Formation: Marine limestone or marl beds within the Mandarana region
- Depositional Environment: Shallow marine shelf with fine calcareous sediments conducive to preserving aragonitic ammonite shells
- Biozone: Tithonian ammonite-bearing strata (specific sub-zones not formally assigned)
Morphology & Features: This Pterolytoceras madagascariensis fossil displays hallmark characteristics of the genus:
- Loosely coiled shell with thin, whorled expansion
- Ornate ribbing and possible keel development along the venter
- High suture complexity typical of the Lytoceratidae family
- Polished for display, often showing rich brown, caramel, and cream mineralisation patterns
- Delicate symmetry and preservation ideal for display or study
Notable: Pterolytoceras represents a lineage of fast-swimming, free-floating ammonites known for their elaborate suture lines and fluid shell form. The madagascariensis species is endemic to Jurassic marine sediments of Madagascar and is rarely available in such well-preserved condition. It provides valuable insight into ammonoid evolution and marine biodiversity before the Cretaceous.
Specimen Details:
- Origin: Mandarana, Madagascar
- Species: Pterolytoceras madagascariensis
- Fossil Type: Ammonite Shell (Invertebrate)
- Geological Stage: Tithonian, Late Jurassic
- Size Reference: Scale rule square = 1cm (see photo for full sizing)
- Note: The specimen in the photo is the exact one you will receive
Authenticity & Quality: All of our fossils are professionally selected and verified. This specimen is 100% genuine and includes a Certificate of Authenticity. No restoration or reconstruction.
Why Choose This Fossil? Perfect for:
- Advanced fossil collectors
- Ammonite and cephalopod researchers
- Natural history and science education
- Decorative display or high-end gifting
Shipping & Packaging: Fast, tracked shipping. Carefully packaged with eco-conscious materials to ensure safe and secure delivery.
Bring a beautifully preserved piece of Late Jurassic marine history into your collection with this striking Pterolytoceras madagascariensis ammonite fossil.
All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
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