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Hemicidaris intermedius Regular Echinoid Fossil, Oxfordian Stage, Jurassic France | Authentic Sea Urchin + COA
Hemicidaris intermedius Regular Echinoid Fossil, Oxfordian Stage, Jurassic France | Authentic Sea Urchin + COA - Image 2

Hemicidaris intermedius Regular Echinoid Fossil, Oxfordian Stage, Jurassic France | Authentic Sea Urchin + COA

Original price was: £36.00.Current price is: £32.40.

Hemicidaris intermedius Regular Echinoid Fossil – Oxfordian Stage, Late Jurassic, Novion-Porcien, Ardennes, France

This rare and elegant fossil is a well-preserved specimen of Hemicidaris intermedius, a regular echinoid (sea urchin) that lived during the Oxfordian stage of the Late Jurassic, approximately 159 to 154 million years ago. It was discovered in the limestone-rich marine deposits near Novion-Porcien, located in the Ardennes region of northern France.

Fossil Type & Species:

  • Type: Invertebrate Fossil (Regular Echinoid / Sea Urchin)
  • Species: Hemicidaris intermedius
  • Phylum: Echinodermata
  • Class: Echinoidea
  • Order: Cidaroida
  • Superfamily: Cidaritoidea
  • Family: Hemicidaridae
  • Described by: Agassiz, 1838 (family and genus authority)

Geological & Stratigraphic Details:

  • Location: Novion-Porcien, Ardennes, France
  • Formation: Oxfordian marine limestone beds
  • Geological Stage: Oxfordian (Upper Jurassic)
  • Age: ~159–154 million years ago
  • Biozone: Associated with the Perisphinctes ammonite zones (Oxfordian)
  • Depositional Environment: Warm, shallow marine shelf with fine carbonate sedimentation ideal for preserving echinoid tests

Morphology & Features: This Hemicidaris intermedius specimen shows:

  • Globular test (shell) with symmetrical radial structure
  • Large primary tubercles arranged in ordered ambulacral and interambulacral zones
  • Fine secondary tuberculation and visible plating patterns
  • Attachment sites for spines (though spines typically not preserved)
  • Colouration varies from pale beige to warm brown or cream, depending on matrix content

Notable: Hemicidaris intermedius is a key representative of Jurassic echinoid fauna and is highly valued for its classic form and detailed preservation. Specimens from Novion-Porcien are well-known for their clarity and completeness, often used in both private collections and academic study.

Specimen Details:

  • Origin: Novion-Porcien, France
  • Species: Hemicidaris intermedius
  • Fossil Type: Regular Echinoid / Sea Urchin Test
  • Geological Stage: Oxfordian, Late Jurassic
  • Size Reference: Scale rule square = 1cm (see listing photos for full size)
  • Note: You will receive the exact fossil specimen shown in the photos

Authenticity & Quality: This fossil is 100% genuine and professionally selected. It includes a Certificate of Authenticity. No restorations or enhancements have been made.

Why Choose This Fossil? Ideal for:

  • Echinoid fossil collectors
  • Jurassic palaeontology and invertebrate studies
  • Educational and museum displays
  • Unique and scientifically valuable fossil gifts

Shipping & Packaging: All items are securely packed with eco-conscious materials and shipped via tracked delivery for safe arrival.

Add a pristine example of Jurassic sea urchin evolution to your collection with this authentic Hemicidaris intermedius fossil from Novion-Porcien, France.

 

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

(Actual as seen)

Only 1 left in stock

SKU: UF3220 Category:

Description

Hemicidaris intermedius Regular Echinoid Fossil – Oxfordian Stage, Late Jurassic, Novion-Porcien, Ardennes, France

This rare and elegant fossil is a well-preserved specimen of Hemicidaris intermedius, a regular echinoid (sea urchin) that lived during the Oxfordian stage of the Late Jurassic, approximately 159 to 154 million years ago. It was discovered in the limestone-rich marine deposits near Novion-Porcien, located in the Ardennes region of northern France.

Fossil Type & Species:

  • Type: Invertebrate Fossil (Regular Echinoid / Sea Urchin)
  • Species: Hemicidaris intermedius
  • Phylum: Echinodermata
  • Class: Echinoidea
  • Order: Cidaroida
  • Superfamily: Cidaritoidea
  • Family: Hemicidaridae
  • Described by: Agassiz, 1838 (family and genus authority)

Geological & Stratigraphic Details:

  • Location: Novion-Porcien, Ardennes, France
  • Formation: Oxfordian marine limestone beds
  • Geological Stage: Oxfordian (Upper Jurassic)
  • Age: ~159–154 million years ago
  • Biozone: Associated with the Perisphinctes ammonite zones (Oxfordian)
  • Depositional Environment: Warm, shallow marine shelf with fine carbonate sedimentation ideal for preserving echinoid tests

Morphology & Features: This Hemicidaris intermedius specimen shows:

  • Globular test (shell) with symmetrical radial structure
  • Large primary tubercles arranged in ordered ambulacral and interambulacral zones
  • Fine secondary tuberculation and visible plating patterns
  • Attachment sites for spines (though spines typically not preserved)
  • Colouration varies from pale beige to warm brown or cream, depending on matrix content

Notable: Hemicidaris intermedius is a key representative of Jurassic echinoid fauna and is highly valued for its classic form and detailed preservation. Specimens from Novion-Porcien are well-known for their clarity and completeness, often used in both private collections and academic study.

Specimen Details:

  • Origin: Novion-Porcien, France
  • Species: Hemicidaris intermedius
  • Fossil Type: Regular Echinoid / Sea Urchin Test
  • Geological Stage: Oxfordian, Late Jurassic
  • Size Reference: Scale rule square = 1cm (see listing photos for full size)
  • Note: You will receive the exact fossil specimen shown in the photos

Authenticity & Quality: This fossil is 100% genuine and professionally selected. It includes a Certificate of Authenticity. No restorations or enhancements have been made.

Why Choose This Fossil? Ideal for:

  • Echinoid fossil collectors
  • Jurassic palaeontology and invertebrate studies
  • Educational and museum displays
  • Unique and scientifically valuable fossil gifts

Shipping & Packaging: All items are securely packed with eco-conscious materials and shipped via tracked delivery for safe arrival.

Add a pristine example of Jurassic sea urchin evolution to your collection with this authentic Hemicidaris intermedius fossil from Novion-Porcien, France.

 

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

Additional information

Era

Jurassic
Origin

France

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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