Heliophyllum halli Fossil Coral – Middle Devonian Hamilton Shale – Arkona Ontario Canada – Genuine Fossil with Certificate
£ 6.90
This listing features a genuine fossil of Heliophyllum halli, a solitary rugose
coral from the Middle Devonian period, recovered from the Hamilton Shale of Arkona, Ontario, Canada. Known commonly as a "horn coral", Heliophyllum halli is one of the most iconic solitary corals of the Devonian seas. The photo shows the exact specimen you will receive, and a 1cm scale cube is included for accurate sizing – please refer to the image for full dimensions.Fossil Details:
• Type: Fossil Rugose Coral (Horn Coral)
• Species: Heliophyllum halli
• Order: Rugosa
• Family: Zaphrentidae
• Phylum: Cnidaria
• Kingdom: Animalia
• Formally Described By: Milne-Edwards & Haime, 1851Geological & Stratigraphic Context:
• Geological Period: Devonian
• Epoch: Middle Devonian
• Formation: Hamilton Group – Arkona Shale Member
• Biozone (where applicable): Mucrospirifer and Phacops rana are commonly associated taxa
• Location: Arkona, Lambton County, Ontario, Canada
• Depositional Environment: Shallow, warm marine shelf environment with mudstones, shales, and carbonate lenses reflecting a calm, offshore setting rich in marine faunaMorphology & Notable Features:
• Distinctive conical shape with radial septa visible in transverse cross-section
• Cup-shaped calice often preserved with internal detail
• Surface may display costae (external ribs) and septal grooves from the polyp’s skeletal walls
• Solitary coral, not part of a colony—typical of rugose corals during this time
• Frequently found associated with brachiopods, trilobites, and bryozoans of the Arkona ShaleScientific Significance:
• Heliophyllum halli is an important guide fossil for correlating Middle Devonian marine strata in North America
• It is one of the most studied solitary corals from the Hamilton Group and provides insight into reef and benthic ecosystems of the Devonian
• Excellent example of early coral reef biodiversity and skeletal developmentWhy Buy From Us?
• All fossils are 100% genuine, responsibly collected
• Includes a Certificate of Authenticity
• Exact specimen pictured – no substitutes
• Perfect for fossil collectors, educators, and palaeontology enthusiastsThis impressive Heliophyllum halli horn coral fossil from the Middle Devonian Hamilton Shale of Arkona, Canada is a scientifically important and visually striking specimen, ideal for display or educational use.
coral from the Middle Devonian period, recovered from the Hamilton Shale of Arkona, Ontario, Canada. Known commonly as a "horn coral", Heliophyllum halli is one of the most iconic solitary corals of the Devonian seas. The photo shows the exact specimen you will receive, and a 1cm scale cube is included for accurate sizing – please refer to the image for full dimensions.Fossil Details:
• Type: Fossil Rugose Coral (Horn Coral)
• Species: Heliophyllum halli
• Order: Rugosa
• Family: Zaphrentidae
• Phylum: Cnidaria
• Kingdom: Animalia
• Formally Described By: Milne-Edwards & Haime, 1851Geological & Stratigraphic Context:
• Geological Period: Devonian
• Epoch: Middle Devonian
• Formation: Hamilton Group – Arkona Shale Member
• Biozone (where applicable): Mucrospirifer and Phacops rana are commonly associated taxa
• Location: Arkona, Lambton County, Ontario, Canada
• Depositional Environment: Shallow, warm marine shelf environment with mudstones, shales, and carbonate lenses reflecting a calm, offshore setting rich in marine faunaMorphology & Notable Features:
• Distinctive conical shape with radial septa visible in transverse cross-section
• Cup-shaped calice often preserved with internal detail
• Surface may display costae (external ribs) and septal grooves from the polyp’s skeletal walls
• Solitary coral, not part of a colony—typical of rugose corals during this time
• Frequently found associated with brachiopods, trilobites, and bryozoans of the Arkona ShaleScientific Significance:
• Heliophyllum halli is an important guide fossil for correlating Middle Devonian marine strata in North America
• It is one of the most studied solitary corals from the Hamilton Group and provides insight into reef and benthic ecosystems of the Devonian
• Excellent example of early coral reef biodiversity and skeletal developmentWhy Buy From Us?
• All fossils are 100% genuine, responsibly collected
• Includes a Certificate of Authenticity
• Exact specimen pictured – no substitutes
• Perfect for fossil collectors, educators, and palaeontology enthusiastsThis impressive Heliophyllum halli horn coral fossil from the Middle Devonian Hamilton Shale of Arkona, Canada is a scientifically important and visually striking specimen, ideal for display or educational use.
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