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Fossil Turtle Shell – TRIONYX – Bouldnor Formation, Oligocene, Hamstead, Isle of Wight, United Kingdom

Fossil Turtle Shell – TRIONYX – Bouldnor Formation, Oligocene, Hamstead, Isle of Wight, United Kingdom

Original price was: £9.00.Current price is: £8.10.

This listing features a genuine fossil turtle shell from the extinct genus Trionyx, discovered in the Bouldnor Formation at Hamstead, on the Isle of Wight, United Kingdom. This exceptional specimen dates back to the Oligocene Epoch of the Paleogene Period, offering a rare glimpse into post-dinosaur marine and freshwater environments.

Fossil Type & Species:

  • Type: Turtle Fossil (Shell/Carapace fragment)
  • Genus: Trionyx
  • A soft-shelled turtle known for its flattened shell and leathery carapace

Geological Context:

  • Era: Cenozoic
  • Period: Paleogene
  • Epoch: Oligocene (~33.9 to 23 million years ago)
  • Formation: Bouldnor Formation
  • Depositional Environment: Coastal swampy and estuarine conditions with periodic marine incursions, allowing for exceptional fossil preservation

Morphological Features:

  • Typically preserves broad, flat segments of the carapace
  • Characteristic fine pitting and subtle patterning seen in some Trionyx shell plates
  • Adapted for aquatic life with hydrodynamic form and soft-shell features

Scientific Importance:

  • Trionyx turtles are significant indicators of paleoenvironmental conditions, especially freshwater and nearshore settings
  • Their remains are used in biostratigraphy and paleoecological reconstructions of the Oligocene in Southern England

Taxonomic Classification:

  • Order: Testudines
  • Family: Trionychidae
  • Superfamily: Trionychoidea

Locality Information:

  • Hamstead, Isle of Wight, UK – an important fossil locality within the Bouldnor Formation, known for diverse Oligocene fauna including mammals, reptiles, and freshwater species

Authenticity & Display:

All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. The specimen pictured is the exact one you will receive.

Please refer to the photograph for full sizing details — the scale cube = 1cm.

This rare Trionyx fossil turtle shell fragment is a superb addition for collectors interested in reptilian evolution, Oligocene paleoenvironments, or British fossil heritage.

(Actual as seen)

Only 1 left in stock

SKU: SF0250 Category:

Description

This listing features a genuine fossil turtle shell from the extinct genus Trionyx, discovered in the Bouldnor Formation at Hamstead, on the Isle of Wight, United Kingdom. This exceptional specimen dates back to the Oligocene Epoch of the Paleogene Period, offering a rare glimpse into post-dinosaur marine and freshwater environments.

Fossil Type & Species:

  • Type: Turtle Fossil (Shell/Carapace fragment)
  • Genus: Trionyx
  • A soft-shelled turtle known for its flattened shell and leathery carapace

Geological Context:

  • Era: Cenozoic
  • Period: Paleogene
  • Epoch: Oligocene (~33.9 to 23 million years ago)
  • Formation: Bouldnor Formation
  • Depositional Environment: Coastal swampy and estuarine conditions with periodic marine incursions, allowing for exceptional fossil preservation

Morphological Features:

  • Typically preserves broad, flat segments of the carapace
  • Characteristic fine pitting and subtle patterning seen in some Trionyx shell plates
  • Adapted for aquatic life with hydrodynamic form and soft-shell features

Scientific Importance:

  • Trionyx turtles are significant indicators of paleoenvironmental conditions, especially freshwater and nearshore settings
  • Their remains are used in biostratigraphy and paleoecological reconstructions of the Oligocene in Southern England

Taxonomic Classification:

  • Order: Testudines
  • Family: Trionychidae
  • Superfamily: Trionychoidea

Locality Information:

  • Hamstead, Isle of Wight, UK – an important fossil locality within the Bouldnor Formation, known for diverse Oligocene fauna including mammals, reptiles, and freshwater species

Authenticity & Display:

All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. The specimen pictured is the exact one you will receive.

Please refer to the photograph for full sizing details — the scale cube = 1cm.

This rare Trionyx fossil turtle shell fragment is a superb addition for collectors interested in reptilian evolution, Oligocene paleoenvironments, or British fossil heritage.

Additional information

Era

Oligocene
Origin

United Kingdom

Oligocene Information

The Oligocene Epoch (33.9–23 million years ago) was a time of cooling climates and the transition to more modern ecosystems. Following the warm Eocene, global temperatures dropped, leading to the expansion of grasslands and the first permanent Antarctic ice sheets. Forests shrank, and grazing mammals like early horses, deer, and rhinos thrived in open landscapes. Primates evolved, with the ancestors of monkeys and apes appearing. In the oceans, whales diversified, and the first seals emerged. The Oligocene also saw the formation of major ocean currents, which further shaped Earth's climate. This period set the stage for the Miocene, with continued cooling and the rise of more modern mammal species.

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