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Phymosoma koenigi Fossil Echinoid | Small Cretaceous Sea Urchin Dover Kent UK | Genuine w/ COA

Phymosoma koenigi Fossil Echinoid | Small Cretaceous Sea Urchin Dover Kent UK | Genuine w/ COA

£18.00

Fossil Type & Species: Phymosoma koenigi (Mantell) – small regular echinoid (sea urchin)

Geological Formation & Zone: Cretaceous, Lower Santonian Stage Mammites nodosoides ammonite zone (M. coranguinum)

Age: Approx. 86 – 83 million years ago

Locality: Dover, Kent, United Kingdom

 

Detailed Description: This listing presents a beautifully preserved fossil of Phymosoma koenigi, a small regular echinoid (sea urchin) from the Lower Santonian stage of the Late Cretaceous period. Collected from the famous chalk cliffs of Dover, Kent, this echinoid is an excellent example of Mesozoic marine invertebrate life.

Phymosoma koenigi is known for its hemispherical test (shell), radial symmetry, and well-defined tuberculation patterns used for spine attachment. As a regular echinoid, it maintained a dome-like shape and fed on organic material on the sea floor. This specimen hails from the M. coranguinum ammonite zone, a key biostratigraphic marker within the Santonian.

Geological Insight: The chalk deposits of Dover represent a tranquil, deep marine environment during the Cretaceous. The fine carbonate muds of this period preserved marine organisms with remarkable fidelity. The Lower Santonian, particularly the M. coranguinum Zone, is well-known for its diverse assemblage of echinoids, brachiopods, and ammonites. This echinoid provides direct evidence of the biodiversity and ecological structure of these Cretaceous seas.

 

Item Specifics:

  • Species: Phymosoma koenigi (Mantell)
  • Fossil Type: Regular Echinoid (Sea Urchin)
  • Condition: 100% natural, unmodified
  • Geological Age: Cretaceous, Lower Santonian
  • Zone: M. coranguinum
  • Location: Dover, Kent, UK
  • Size: Refer to photo with 1cm scale cube
  • Item: The actual specimen in the photo will be received

 

Authenticity & Quality: All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. This specimen has been carefully chosen for its scientific and visual value. The fossil shown is the exact item you will receive.

 

Shipping & Packaging: All fossils are securely packed and shipped with tracking. Ideal for collectors, educators, or as a unique and educational gift.

 

(Actual as seen)

Out of stock

SKU: SF0103 Category:

Description

Fossil Type & Species: Phymosoma koenigi (Mantell) – small regular echinoid (sea urchin)

Geological Formation & Zone: Cretaceous, Lower Santonian Stage Mammites nodosoides ammonite zone (M. coranguinum)

Age: Approx. 86 – 83 million years ago

Locality: Dover, Kent, United Kingdom

 

Detailed Description: This listing presents a beautifully preserved fossil of Phymosoma koenigi, a small regular echinoid (sea urchin) from the Lower Santonian stage of the Late Cretaceous period. Collected from the famous chalk cliffs of Dover, Kent, this echinoid is an excellent example of Mesozoic marine invertebrate life.

Phymosoma koenigi is known for its hemispherical test (shell), radial symmetry, and well-defined tuberculation patterns used for spine attachment. As a regular echinoid, it maintained a dome-like shape and fed on organic material on the sea floor. This specimen hails from the M. coranguinum ammonite zone, a key biostratigraphic marker within the Santonian.

Geological Insight: The chalk deposits of Dover represent a tranquil, deep marine environment during the Cretaceous. The fine carbonate muds of this period preserved marine organisms with remarkable fidelity. The Lower Santonian, particularly the M. coranguinum Zone, is well-known for its diverse assemblage of echinoids, brachiopods, and ammonites. This echinoid provides direct evidence of the biodiversity and ecological structure of these Cretaceous seas.

 

Item Specifics:

  • Species: Phymosoma koenigi (Mantell)
  • Fossil Type: Regular Echinoid (Sea Urchin)
  • Condition: 100% natural, unmodified
  • Geological Age: Cretaceous, Lower Santonian
  • Zone: M. coranguinum
  • Location: Dover, Kent, UK
  • Size: Refer to photo with 1cm scale cube
  • Item: The actual specimen in the photo will be received

 

Authenticity & Quality: All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. This specimen has been carefully chosen for its scientific and visual value. The fossil shown is the exact item you will receive.

 

Shipping & Packaging: All fossils are securely packed and shipped with tracking. Ideal for collectors, educators, or as a unique and educational gift.

 

Additional information

Era

Cretaceous
Origin

United Kingdom

Cretaceous Information

The Cretaceous Period (145–66 million years ago) was the final era of the Mesozoic, marked by the dominance of dinosaurs and the rise of flowering plants. It had a warm, greenhouse climate, with high sea levels that created vast shallow inland seas. Marine life flourished, including mosasaurs, ammonites, and rudist reefs, while the land was ruled by iconic dinosaurs like Tyrannosaurus rex, Triceratops, and Spinosaurus. Mammals and birds diversified, and insects thrived. The period ended with the mass extinction event, likely caused by an asteroid impact, wiping out the dinosaurs and paving the way for the rise of mammals in the Cenozoic.

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