Fossils for Sale - High-quality BRITISH and WORLDWIDE Fossils. An impressive selection of fossils, including Ammonites, Trilobites, Belemnites, Fossil Fish, Fossil Shark Teeth, Fossilised Insects in Amber, Dinosaurs, and Reptiles. UK Fossils was formed in 1988 and collects and preps our own fossils in the heart of the Jurassic Coast, collecting fossils from Lyme Regis, Charmouth and Somerset. Our passion for fossils is reflected in our carefully curated collection, which includes some of the rarest and most unique specimens available.

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Rare Fossil Ammonite Sonninia (Euhoploceras) modestum | Jurassic Lower Bajocian Dorset UK | Genuine + COA
Rare Fossil Ammonite Sonninia (Euhoploceras) modestum | Jurassic Lower Bajocian Dorset UK | Genuine + COA - Image 2

Rare Fossil Ammonite Sonninia (Euhoploceras) modestum | Jurassic Lower Bajocian Dorset UK | Genuine + COA

£43.20

For sale is a rare and beautifully preserved fossil ammonite, Sonninia (Euhoploceras) modestum, collected from the Lower Bajocian Stage of the Jurassic Period, found in Oborne Wood, Sherborne, Dorset, United Kingdom. The specimen you see in the photos is the exact one you will receive. Scale cubes represent 1cm – full measurements can be viewed in the images.

This is a carefully selected specimen, ideal for collectors, educational displays, or geological study.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

 

Geological & Scientific Details:

  • Fossil Type: Ammonite
  • Species: Sonninia (Euhoploceras) modestum
  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Graphoceratidae (formerly considered within Sonniniidae in some classifications)
  • Geological Stage: Lower Bajocian (approx. 170.3 – 168.3 million years ago)
  • Biozone: Likely Laeviuscula Zone, based on regional occurrence and species
  • Period: Jurassic
  • Locality: Oborne Wood, near Sherborne, Dorset, England, UK
  • Depositional Environment: Marine shelf environment within the Wessex Basin — calcareous, fine-grained sediments deposited under low-energy conditions

 

Morphological Features:

  • Planispiral shell with strong, bifurcating ribs
  • Moderate involution with compressed whorls
  • Prominent ribbing that may cross the venter or fade centrally depending on preservation
  • Typical of Euhoploceras, the ribbing and shell profile suggest a fast-swimming nektonic lifestyle
  • Fine detail may reveal growth lines and suture patterns upon close inspection

 

Scientific Importance: Sonninia (Euhoploceras) modestum is a distinctive ammonite used in biostratigraphic correlation within the Lower Bajocian of Europe. This species helps identify the Laeviuscula Biozone, important in defining stratigraphic boundaries in southern England and across the Anglo-Paris Basin.

First described in the 19th century, modestum represents an evolutionary lineage within Euhoploceras, contributing to our understanding of ammonite diversification in the early Middle Jurassic.

 

Ideal For:

  • Jurassic ammonite collectors
  • Biostratigraphic reference material
  • Museum or educational displays

 

Included With Purchase:

  • The exact Sonninia (Euhoploceras) modestum fossil as shown
  • Certificate of Authenticity
  • Secure protective packaging

 

Please message with any questions. We are always happy to assist with more details or further fossil information.

(Actual as seen)

Only 1 left in stock

SKU: UF4526 Category:

Description

For sale is a rare and beautifully preserved fossil ammonite, Sonninia (Euhoploceras) modestum, collected from the Lower Bajocian Stage of the Jurassic Period, found in Oborne Wood, Sherborne, Dorset, United Kingdom. The specimen you see in the photos is the exact one you will receive. Scale cubes represent 1cm – full measurements can be viewed in the images.

This is a carefully selected specimen, ideal for collectors, educational displays, or geological study.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

 

Geological & Scientific Details:

  • Fossil Type: Ammonite
  • Species: Sonninia (Euhoploceras) modestum
  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Graphoceratidae (formerly considered within Sonniniidae in some classifications)
  • Geological Stage: Lower Bajocian (approx. 170.3 – 168.3 million years ago)
  • Biozone: Likely Laeviuscula Zone, based on regional occurrence and species
  • Period: Jurassic
  • Locality: Oborne Wood, near Sherborne, Dorset, England, UK
  • Depositional Environment: Marine shelf environment within the Wessex Basin — calcareous, fine-grained sediments deposited under low-energy conditions

 

Morphological Features:

  • Planispiral shell with strong, bifurcating ribs
  • Moderate involution with compressed whorls
  • Prominent ribbing that may cross the venter or fade centrally depending on preservation
  • Typical of Euhoploceras, the ribbing and shell profile suggest a fast-swimming nektonic lifestyle
  • Fine detail may reveal growth lines and suture patterns upon close inspection

 

Scientific Importance: Sonninia (Euhoploceras) modestum is a distinctive ammonite used in biostratigraphic correlation within the Lower Bajocian of Europe. This species helps identify the Laeviuscula Biozone, important in defining stratigraphic boundaries in southern England and across the Anglo-Paris Basin.

First described in the 19th century, modestum represents an evolutionary lineage within Euhoploceras, contributing to our understanding of ammonite diversification in the early Middle Jurassic.

 

Ideal For:

  • Jurassic ammonite collectors
  • Biostratigraphic reference material
  • Museum or educational displays

 

Included With Purchase:

  • The exact Sonninia (Euhoploceras) modestum fossil as shown
  • Certificate of Authenticity
  • Secure protective packaging

 

Please message with any questions. We are always happy to assist with more details or further fossil information.

Additional information

Era

Jurassic
Origin

United Kingdom

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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