Rare Fossil Ammonite Dolikephalites dolius Jurassic Callovian Madagascar | Authentic Collector Fossil
£ 12.60
This listing features a rare and well-preserved fossil of Dolikephalites dolius,
a scientifically significant ammonite species from the Middle Callovian stage of the Jurassic period. The specimen originates from the fossiliferous marine beds of Madagascar, a region globally celebrated for its beautifully preserved Jurassic ammonite fauna.Geological Context:
• Fossil Type: Ammonite (Extinct marine mollusc, related to modern squid and octopus)
• Species: Dolikephalites dolius (Spath, 1928)
• Order: Ammonitida
• Superfamily: Stephanoceratoidea
• Family: Kosmoceratidae
• Geological Stage: Middle Callovian (c. 165.3 to 161.2 million years ago)
• Formation: Marine limestone and marl deposits of western Madagascar
• Depositional Environment: Shallow tropical marine shelf with carbonate-rich sedimentsAmmonites of the genus Dolikephalites are characterized by their moderately involute shells, complex suture patterns, and well-defined ribbing. These features make D. dolius a highly desirable specimen for both collectors and palaeontologists.Morphology & Notable Features:
• Planispiral shell with moderately compressed, slightly involute whorls
• Strong, bifurcating ribs extending across the flanks
• Rounded venter, occasionally with subtle tuberculation
• Prominent sutures typical of the Kosmoceratid lineage
• Rarely offered in the fossil trade, especially in complete conditionBiozone Association: Dolikephalites dolius is most commonly associated with the Athleta Zone of the Middle Callovian, a key interval for biostratigraphic correlations in the Jurassic marine record of Madagascar and surrounding regions.Specimen Details:
• Origin: Madagascar
• Age: Middle Callovian Stage, Jurassic (~163 million years old)
• Scale: Scale rule square/cube = 1cm. Please see photo for exact dimensions
• Condition: Hand-selected for its preservation, clarity, and completeness
• Photo: The item you see is the exact fossil you will receiveCertification & Authenticity: All of our fossils are 100% genuine and come with a Certificate of Authenticity. Each specimen is professionally reviewed and chosen for its scientific value and display quality.This rare Dolikephalites dolius ammonite is a striking and valuable addition to any fossil collection, bringing a fascinating piece of Jurassic marine history from the ancient seas of Madagascar into your hands.
a scientifically significant ammonite species from the Middle Callovian stage of the Jurassic period. The specimen originates from the fossiliferous marine beds of Madagascar, a region globally celebrated for its beautifully preserved Jurassic ammonite fauna.Geological Context:
• Fossil Type: Ammonite (Extinct marine mollusc, related to modern squid and octopus)
• Species: Dolikephalites dolius (Spath, 1928)
• Order: Ammonitida
• Superfamily: Stephanoceratoidea
• Family: Kosmoceratidae
• Geological Stage: Middle Callovian (c. 165.3 to 161.2 million years ago)
• Formation: Marine limestone and marl deposits of western Madagascar
• Depositional Environment: Shallow tropical marine shelf with carbonate-rich sedimentsAmmonites of the genus Dolikephalites are characterized by their moderately involute shells, complex suture patterns, and well-defined ribbing. These features make D. dolius a highly desirable specimen for both collectors and palaeontologists.Morphology & Notable Features:
• Planispiral shell with moderately compressed, slightly involute whorls
• Strong, bifurcating ribs extending across the flanks
• Rounded venter, occasionally with subtle tuberculation
• Prominent sutures typical of the Kosmoceratid lineage
• Rarely offered in the fossil trade, especially in complete conditionBiozone Association: Dolikephalites dolius is most commonly associated with the Athleta Zone of the Middle Callovian, a key interval for biostratigraphic correlations in the Jurassic marine record of Madagascar and surrounding regions.Specimen Details:
• Origin: Madagascar
• Age: Middle Callovian Stage, Jurassic (~163 million years old)
• Scale: Scale rule square/cube = 1cm. Please see photo for exact dimensions
• Condition: Hand-selected for its preservation, clarity, and completeness
• Photo: The item you see is the exact fossil you will receiveCertification & Authenticity: All of our fossils are 100% genuine and come with a Certificate of Authenticity. Each specimen is professionally reviewed and chosen for its scientific value and display quality.This rare Dolikephalites dolius ammonite is a striking and valuable addition to any fossil collection, bringing a fascinating piece of Jurassic marine history from the ancient seas of Madagascar into your hands.
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