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.

FREE UK DELIVERY - Save up to 60%

Rare Fossil Ammonite Sonninia oxiformis acrida | Jurassic Lower Bajocian Dorset UK | Genuine + COA
Rare Fossil Ammonite Sonninia oxiformis acrida | Jurassic Lower Bajocian Dorset UK | Genuine + COA - Image 2

Rare Fossil Ammonite Sonninia oxiformis acrida | Jurassic Lower Bajocian Dorset UK | Genuine + COA

£43.20

A rare and beautifully preserved fossil ammonite: Sonninia oxiformis acrida, from the Lower Bajocian Stage of the Jurassic Period, found in Oborne Wood, Sherborne, Dorset, United Kingdom. The photo shows the actual specimen for sale. Each scale cube represents 1cm — please see the image for full sizing.

This is a carefully selected, scientifically significant piece, ideal for collectors, educators, and display.

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

 

Geological & Scientific Details:

  • Fossil Type: Ammonite (planispiral shell)
  • Species/Subspecies: Sonninia oxiformis acrida
  • Order: Ammonitida
  • Superfamily: Hildoceratoidea
  • Family: Sonniniidae
  • Geological Stage: Lower Bajocian (approx. 170.3 – 168.3 million years ago)
  • Biozone: Laeviuscula Zone (tentative; based on species and horizon)
  • Period: Jurassic
  • Locality: Oborne Wood, near Sherborne, Dorset, England, UK
  • Depositional Environment: Shallow marine shelf – low-energy conditions with calcareous mud and silt accumulation typical of the Wessex Basin

 

Morphology & Notable Features:

  • Moderately involute shell with narrow umbilicus
  • Oxiform (egg-shaped) shell outline – origin of species name
  • Ribs are fine, dense, and often sigmoidal, sweeping forward across the flanks
  • Smooth venter with faint keel may be preserved
  • Subspecies acrida often shows more delicate ribbing than nominate form
  • Excellent definition of ornamentation and classic Sonniniid proportions

 

Scientific Importance: Sonninia oxiformis acrida is a rare ammonite subspecies, valuable for Bajocian biostratigraphy and regional correlation in southern England. Ammonites from the Sonniniidae family are key markers for dating Lower Bajocian strata and identifying the Laeviuscula Biozone.

Originally described in 19th–20th century stratigraphic works, the acrida subspecies is less commonly encountered and highly desirable among Jurassic ammonite collectors.

 

Ideal For:

  • Ammonite and Jurassic fossil collectors
  • Stratigraphic or biostratigraphic reference
  • Educational and museum displays

 

What You Will Receive:

  • The exact Sonninia oxiformis acrida fossil as shown
  • Certificate of Authenticity
  • Secure, protective packaging

 

For any further information or questions, please feel free to contact us. We are always happy to assist with fossil insights and collecting guidance.

(Actual as seen)

Only 1 left in stock

SKU: UF4525 Category:

Description

A rare and beautifully preserved fossil ammonite: Sonninia oxiformis acrida, from the Lower Bajocian Stage of the Jurassic Period, found in Oborne Wood, Sherborne, Dorset, United Kingdom. The photo shows the actual specimen for sale. Each scale cube represents 1cm — please see the image for full sizing.

This is a carefully selected, scientifically significant piece, ideal for collectors, educators, and display.

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

 

Geological & Scientific Details:

  • Fossil Type: Ammonite (planispiral shell)
  • Species/Subspecies: Sonninia oxiformis acrida
  • Order: Ammonitida
  • Superfamily: Hildoceratoidea
  • Family: Sonniniidae
  • Geological Stage: Lower Bajocian (approx. 170.3 – 168.3 million years ago)
  • Biozone: Laeviuscula Zone (tentative; based on species and horizon)
  • Period: Jurassic
  • Locality: Oborne Wood, near Sherborne, Dorset, England, UK
  • Depositional Environment: Shallow marine shelf – low-energy conditions with calcareous mud and silt accumulation typical of the Wessex Basin

 

Morphology & Notable Features:

  • Moderately involute shell with narrow umbilicus
  • Oxiform (egg-shaped) shell outline – origin of species name
  • Ribs are fine, dense, and often sigmoidal, sweeping forward across the flanks
  • Smooth venter with faint keel may be preserved
  • Subspecies acrida often shows more delicate ribbing than nominate form
  • Excellent definition of ornamentation and classic Sonniniid proportions

 

Scientific Importance: Sonninia oxiformis acrida is a rare ammonite subspecies, valuable for Bajocian biostratigraphy and regional correlation in southern England. Ammonites from the Sonniniidae family are key markers for dating Lower Bajocian strata and identifying the Laeviuscula Biozone.

Originally described in 19th–20th century stratigraphic works, the acrida subspecies is less commonly encountered and highly desirable among Jurassic ammonite collectors.

 

Ideal For:

  • Ammonite and Jurassic fossil collectors
  • Stratigraphic or biostratigraphic reference
  • Educational and museum displays

 

What You Will Receive:

  • The exact Sonninia oxiformis acrida fossil as shown
  • Certificate of Authenticity
  • Secure, protective packaging

 

For any further information or questions, please feel free to contact us. We are always happy to assist with fossil insights and collecting guidance.

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.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Related products