Hemicidaris intermedius Regular Echinoid Fossil, Oxfordian Stage, Jurassic France | Authentic Sea Urchin + COA
£ 36.00
Hemicidaris intermedius Regular Echinoid Fossil – Oxfordian Stage, Late
Jurassic, Novion-Porcien, Ardennes, FranceThis 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 testsMorphology & 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 contentNotable: 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 photosAuthenticity & 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 giftsShipping & 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.
Jurassic, Novion-Porcien, Ardennes, FranceThis 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 testsMorphology & 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 contentNotable: 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 photosAuthenticity & 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 giftsShipping & 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.
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