Kranaosphinctes Fossil Ammonite – Oxfordian Jurassic – Madagascar – Genuine Specimen with Certificate of Authenticity
£ 6.90
This listing is for a genuine Kranaosphinctes fossil ammonite, originating from
the Oxfordian stage of the Late Jurassic period, found in Madagascar—a world-renowned locality for exceptionally preserved fossil ammonites.The exact specimen pictured is the one you will receive, and a 1cm scale cube is included in the photo to provide accurate sizing reference. Please refer closely to the image for full dimensions and details.Species & Classification:
• Genus: Kranaosphinctes
• Type: Fossil Ammonite (extinct marine cephalopod)
• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Perisphinctidae
• Class: Cephalopoda
• Phylum: MolluscaGeological & Stratigraphic Context:
• Geological Period: Jurassic
• Stage: Oxfordian (~163–157 million years ago)
• Location: Madagascar (exact quarry not always recorded)
• Depositional Environment: Shallow tropical marine platform; soft carbonate or marl sediment ideal for fossil preservation
• Biozone/Zonation: Members of Kranaosphinctes are associated with mid-to-late Oxfordian ammonite biozones, often in the Perisphinctes bifurcatus or Gregoriceras transversarium zones
• Preservation: Often preserved with rich detail in mineralised shell, frequently showing strong ribbing and intact whorlsMorphological Features:
• Involute planispiral coiling with narrow umbilicus
• Strongly ribbed shell; ribs bifurcate or trifurcate mid-flank
• Ornamented with distinctive primary and secondary ribs
• Some specimens may display evidence of growth interruptions or tubercles
• This genus is typically medium to large in size, with a robust shell architectureNotable Information:
• Kranaosphinctes is a genus closely related to Perisphinctes, sharing similar morphology but with distinctive ribbing patterns that make it identifiable
• Its fossil record is geographically broad, and in Madagascar, preservation quality is notably high due to favourable sediment conditions
• Used biostratigraphically to aid in Oxfordian zonation globallyWhy Buy From Us?
• This is a 100% authentic fossil, not a replica
• Supplied with a Certificate of Authenticity
• Exact fossil pictured—hand-selected for quality and scientific value
• Perfect for collectors, educators, and display in natural history collectionsThis beautiful Kranaosphinctes fossil ammonite from the Oxfordian of Madagascar is a stunning example of Jurassic marine life and an outstanding addition to any fossil collection or educational exhibit.
the Oxfordian stage of the Late Jurassic period, found in Madagascar—a world-renowned locality for exceptionally preserved fossil ammonites.The exact specimen pictured is the one you will receive, and a 1cm scale cube is included in the photo to provide accurate sizing reference. Please refer closely to the image for full dimensions and details.Species & Classification:
• Genus: Kranaosphinctes
• Type: Fossil Ammonite (extinct marine cephalopod)
• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Perisphinctidae
• Class: Cephalopoda
• Phylum: MolluscaGeological & Stratigraphic Context:
• Geological Period: Jurassic
• Stage: Oxfordian (~163–157 million years ago)
• Location: Madagascar (exact quarry not always recorded)
• Depositional Environment: Shallow tropical marine platform; soft carbonate or marl sediment ideal for fossil preservation
• Biozone/Zonation: Members of Kranaosphinctes are associated with mid-to-late Oxfordian ammonite biozones, often in the Perisphinctes bifurcatus or Gregoriceras transversarium zones
• Preservation: Often preserved with rich detail in mineralised shell, frequently showing strong ribbing and intact whorlsMorphological Features:
• Involute planispiral coiling with narrow umbilicus
• Strongly ribbed shell; ribs bifurcate or trifurcate mid-flank
• Ornamented with distinctive primary and secondary ribs
• Some specimens may display evidence of growth interruptions or tubercles
• This genus is typically medium to large in size, with a robust shell architectureNotable Information:
• Kranaosphinctes is a genus closely related to Perisphinctes, sharing similar morphology but with distinctive ribbing patterns that make it identifiable
• Its fossil record is geographically broad, and in Madagascar, preservation quality is notably high due to favourable sediment conditions
• Used biostratigraphically to aid in Oxfordian zonation globallyWhy Buy From Us?
• This is a 100% authentic fossil, not a replica
• Supplied with a Certificate of Authenticity
• Exact fossil pictured—hand-selected for quality and scientific value
• Perfect for collectors, educators, and display in natural history collectionsThis beautiful Kranaosphinctes fossil ammonite from the Oxfordian of Madagascar is a stunning example of Jurassic marine life and an outstanding addition to any fossil collection or educational exhibit.
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