Rare 4" Grossouvria sulcifera Fossil Ammonite | Middle Callovian Jurassic | Ashton Keynes Wiltshire UK | Genuine Specimen with COA
£ 36.00
This listing is for a Rare 4" Fossil Ammonite (Grossouvria sulcifera) from the
Middle Callovian Stage of the Middle Jurassic, discovered at Ashton Keynes, Wiltshire, United Kingdom.100% Genuine Fossil Specimen – All of our fossils are authentic and come with a Certificate of Authenticity.Exact Specimen Shown – The photos provided are of the actual fossil you will receive.Scale for Reference – Scale rule squares/cube = 1cm. Please see photos for full sizing.GEOLOGICAL & SCIENTIFIC DETAILS:
• Fossil Type: Ammonite (extinct marine mollusc, related to squid and octopus).
• Species: Grossouvria sulcifera.
• Order: Ammonitida.
• Superfamily: Stephanoceratoidea.
• Family: Tulitidae.
• Geological Period: Jurassic.
• Stage/Age: Middle Callovian (approx. 166 – 163 million years ago).
• Locality: Ashton Keynes, Wiltshire, UK.NOTABLE FEATURES & MORPHOLOGY:
• Shell Form: Moderately involute with robust, thick whorls.
• Ribs: Deep, widely spaced ribs crossing the flanks, giving the ammonite its characteristic “sulcifera” appearance.
• Whorl Section: Strongly rounded, producing a bold and striking shell.
• Size: A rare, large specimen at 4", making it highly collectible.DEPOSITIONAL ENVIRONMENT:During the Callovian, the Wiltshire area was covered by shallow marine seas depositing fine sediments and oolitic limestones. These conditions preserved ammonites and associated fauna in excellent detail.SCIENTIFIC & COLLECTING IMPORTANCE:Grossouvria sulcifera is an important ammonite species for biostratigraphic correlation in the Callovian Stage. Its distinctive morphology and rarity make it both a scientifically valuable and highly desirable collector’s specimen. Why Buy This Fossil?
• A rare ammonite species from the Middle Jurassic of Wiltshire, UK.
• Excellent preservation with bold ribbing and rounded whorl form.
• A significant addition for collectors of ammonites, Jurassic fossils, or UK material.
• Supplied with a Certificate of Authenticity guaranteeing its provenance. All of our fossils are responsibly sourced, carefully prepared, and chosen for quality.
Middle Callovian Stage of the Middle Jurassic, discovered at Ashton Keynes, Wiltshire, United Kingdom.100% Genuine Fossil Specimen – All of our fossils are authentic and come with a Certificate of Authenticity.Exact Specimen Shown – The photos provided are of the actual fossil you will receive.Scale for Reference – Scale rule squares/cube = 1cm. Please see photos for full sizing.GEOLOGICAL & SCIENTIFIC DETAILS:
• Fossil Type: Ammonite (extinct marine mollusc, related to squid and octopus).
• Species: Grossouvria sulcifera.
• Order: Ammonitida.
• Superfamily: Stephanoceratoidea.
• Family: Tulitidae.
• Geological Period: Jurassic.
• Stage/Age: Middle Callovian (approx. 166 – 163 million years ago).
• Locality: Ashton Keynes, Wiltshire, UK.NOTABLE FEATURES & MORPHOLOGY:
• Shell Form: Moderately involute with robust, thick whorls.
• Ribs: Deep, widely spaced ribs crossing the flanks, giving the ammonite its characteristic “sulcifera” appearance.
• Whorl Section: Strongly rounded, producing a bold and striking shell.
• Size: A rare, large specimen at 4", making it highly collectible.DEPOSITIONAL ENVIRONMENT:During the Callovian, the Wiltshire area was covered by shallow marine seas depositing fine sediments and oolitic limestones. These conditions preserved ammonites and associated fauna in excellent detail.SCIENTIFIC & COLLECTING IMPORTANCE:Grossouvria sulcifera is an important ammonite species for biostratigraphic correlation in the Callovian Stage. Its distinctive morphology and rarity make it both a scientifically valuable and highly desirable collector’s specimen. Why Buy This Fossil?
• A rare ammonite species from the Middle Jurassic of Wiltshire, UK.
• Excellent preservation with bold ribbing and rounded whorl form.
• A significant addition for collectors of ammonites, Jurassic fossils, or UK material.
• Supplied with a Certificate of Authenticity guaranteeing its provenance. All of our fossils are responsibly sourced, carefully prepared, and chosen for quality.
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