RARE 10" Proplanulites Fossil Ammonite | Lower Callovian Jurassic | Manor Farm Wiltshire UK | Certified Genuine Specimen
£ 600.00
An impressive and rare 10-inch fossil ammonite: Proplanulites sp., from the
Lower Callovian Stage of the Middle Jurassic, collected from the renowned fossil-rich beds of Manor Farm, Wiltshire, United Kingdom. This exceptional example represents an important evolutionary stage in mid-Jurassic ammonite development, making it a desirable piece for collectors and educational display.The specimen shown is the exact fossil you will receive, photographed with a 1cm scale cube for size reference. Please refer to the images for detailed condition and dimensions. Geological & Palaeontological Information:
• Fossil Type: Ammonite
• Genus: Proplanulites
• Geological Period: Jurassic
• Stage: Lower Callovian (~165 to 163 million years ago)
• Location: Manor Farm, Wiltshire, England, UK
• Depositional Environment: Shallow marine shelf; fine calcareous mudstones and silts from the Oxford Clay Formation
• Order: Ammonitida
• Superfamily: Stephanoceratoidea
• Family: Kosmoceratidae
• Biozone (Inferred): Likely within the Macrocephalites herveyi or Bullatimorphites bullatus Zones of the Lower Callovian, based on stratigraphy at Manor Farm Morphological Features:
• Moderately involute shell with smooth or weakly ribbed flanks
• Broad, rounded whorls with a flattened venter in later growth stages
• Sutures typically complex, though less ornamented than later Kosmoceratid forms
• Potential faint keel or ventrolateral tubercles in some specimens Notable Points:
• Proplanulites is considered transitional in form, marking key ammonite evolution in the Callovian
• Manor Farm is a scientifically significant site for Jurassic marine invertebrates
• Large, display-sized examples of Proplanulites are seldom available on the fossil market Why This Fossil is Special:
• Rare ammonite genus from a globally important stratigraphic interval
• Excellent size and preservation from a UK heritage site
• Supplied with a Certificate of Authenticity
• 100% genuine and ethically sourced fossil
• Ideal for collectors, academic institutions, or interior display
Lower Callovian Stage of the Middle Jurassic, collected from the renowned fossil-rich beds of Manor Farm, Wiltshire, United Kingdom. This exceptional example represents an important evolutionary stage in mid-Jurassic ammonite development, making it a desirable piece for collectors and educational display.The specimen shown is the exact fossil you will receive, photographed with a 1cm scale cube for size reference. Please refer to the images for detailed condition and dimensions. Geological & Palaeontological Information:
• Fossil Type: Ammonite
• Genus: Proplanulites
• Geological Period: Jurassic
• Stage: Lower Callovian (~165 to 163 million years ago)
• Location: Manor Farm, Wiltshire, England, UK
• Depositional Environment: Shallow marine shelf; fine calcareous mudstones and silts from the Oxford Clay Formation
• Order: Ammonitida
• Superfamily: Stephanoceratoidea
• Family: Kosmoceratidae
• Biozone (Inferred): Likely within the Macrocephalites herveyi or Bullatimorphites bullatus Zones of the Lower Callovian, based on stratigraphy at Manor Farm Morphological Features:
• Moderately involute shell with smooth or weakly ribbed flanks
• Broad, rounded whorls with a flattened venter in later growth stages
• Sutures typically complex, though less ornamented than later Kosmoceratid forms
• Potential faint keel or ventrolateral tubercles in some specimens Notable Points:
• Proplanulites is considered transitional in form, marking key ammonite evolution in the Callovian
• Manor Farm is a scientifically significant site for Jurassic marine invertebrates
• Large, display-sized examples of Proplanulites are seldom available on the fossil market Why This Fossil is Special:
• Rare ammonite genus from a globally important stratigraphic interval
• Excellent size and preservation from a UK heritage site
• Supplied with a Certificate of Authenticity
• 100% genuine and ethically sourced fossil
• Ideal for collectors, academic institutions, or interior display
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