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 giant 8" dichotomosphinctes antecedens fossil ammonite – callovian, jurassic – tulear, madagascar – certified genuine specimen
Rare giant 8" dichotomosphinctes antecedens fossil ammonite – callovian, jurassic – tulear, madagascar – certified genuine specimen - Image 2
Rare giant 8" dichotomosphinctes antecedens fossil ammonite – callovian, jurassic – tulear, madagascar – certified genuine specimen - Image 3

Rare giant 8″ dichotomosphinctes antecedens fossil ammonite – callovian, jurassic – tulear, madagascar – certified genuine specimen

Original price was: £540.00.Current price is: £486.00.

Specimen: Dichotomosphinctes antecedens Fossil Ammonite

Fossil Type: Ammonite (Extinct Cephalopod Mollusc)

Age: Middle Jurassic – Callovian Stage (~166 – 163 million years ago)

Geological Formation: Tulear Region, Madagascar

Size: Giant – Approximately 8 inches in diameter

Scale Cube = 1cm – Please refer to photo for accurate sizing

Includes Certificate of Authenticity

This rare giant 8″ ammonite fossil of the species Dichotomosphinctes antecedens is an outstanding and eye-catching collector’s piece from the famous Tulear region of Madagascar, which is celebrated for its exceptional Middle Jurassic fossil preservation.

Ammonites such as Dichotomosphinctes antecedens were marine cephalopods that lived during the Callovian stage of the Jurassic period, about 166 to 163 million years ago. These animals were related to modern squids, octopuses, and cuttlefish, but they had a hard, coiled external shell used for buoyancy and protection. Their spiral shells grew in chambers as they aged, leaving behind highly patterned fossils with beautiful ribbed ornamentation.

This fossil shows classic features of Dichotomosphinctes, including strongly ribbed whorls and a beautifully defined spiral structure. Its large size (8 inches) and excellent preservation make it a rare and desirable specimen, especially for those who appreciate Jurassic ammonites or seek a centrepiece fossil for a private or educational display.

Madagascar’s Tulear region is one of the world’s richest ammonite fossil sites. The limestone beds here provide outstanding matrix preservation and allow for detailed preparation, resulting in high-contrast fossil features that highlight the natural geometry and beauty of the ammonite shell.

ACTUAL AS SEEN:

The image shows the exact specimen you will receive. This is not a stock photo. The specimen has been carefully cleaned, prepped, and selected by our team for quality and authenticity. Measurements are accurate as far as the shape allows. Colours may vary slightly depending on lighting conditions and screen settings.

Why Buy This Fossil?

  • 100% Genuine Jurassic Fossil
  • Rare large specimen of Dichotomosphinctes antecedens
  • Beautiful ribbed spiral and defined suture lines
  • From a world-famous fossil region: Tulear, Madagascar
  • Supplied with a Certificate of Authenticity
  • Ideal for fossil collectors, natural history displays, museums, or gifts

Please Note:

Once this specific specimen is sold, the listing will be updated with a new ammonite fossil of the same species, but with different shape and dimensions. We advise taking a screenshot or saving the listing photo after purchase for your own reference.

(Actual as seen)

Includes a fully hand-signed Premium Certificate of Authenticity.

Only 1 left in stock

SKU: UF3187 Categories: ,

Description

Specimen: Dichotomosphinctes antecedens Fossil Ammonite

Fossil Type: Ammonite (Extinct Cephalopod Mollusc)

Age: Middle Jurassic – Callovian Stage (~166 – 163 million years ago)

Geological Formation: Tulear Region, Madagascar

Size: Giant – Approximately 8 inches in diameter

Scale Cube = 1cm – Please refer to photo for accurate sizing

Includes Certificate of Authenticity

This rare giant 8″ ammonite fossil of the species Dichotomosphinctes antecedens is an outstanding and eye-catching collector’s piece from the famous Tulear region of Madagascar, which is celebrated for its exceptional Middle Jurassic fossil preservation.

Ammonites such as Dichotomosphinctes antecedens were marine cephalopods that lived during the Callovian stage of the Jurassic period, about 166 to 163 million years ago. These animals were related to modern squids, octopuses, and cuttlefish, but they had a hard, coiled external shell used for buoyancy and protection. Their spiral shells grew in chambers as they aged, leaving behind highly patterned fossils with beautiful ribbed ornamentation.

This fossil shows classic features of Dichotomosphinctes, including strongly ribbed whorls and a beautifully defined spiral structure. Its large size (8 inches) and excellent preservation make it a rare and desirable specimen, especially for those who appreciate Jurassic ammonites or seek a centrepiece fossil for a private or educational display.

Madagascar’s Tulear region is one of the world’s richest ammonite fossil sites. The limestone beds here provide outstanding matrix preservation and allow for detailed preparation, resulting in high-contrast fossil features that highlight the natural geometry and beauty of the ammonite shell.

ACTUAL AS SEEN:

The image shows the exact specimen you will receive. This is not a stock photo. The specimen has been carefully cleaned, prepped, and selected by our team for quality and authenticity. Measurements are accurate as far as the shape allows. Colours may vary slightly depending on lighting conditions and screen settings.

Why Buy This Fossil?

  • 100% Genuine Jurassic Fossil
  • Rare large specimen of Dichotomosphinctes antecedens
  • Beautiful ribbed spiral and defined suture lines
  • From a world-famous fossil region: Tulear, Madagascar
  • Supplied with a Certificate of Authenticity
  • Ideal for fossil collectors, natural history displays, museums, or gifts

Please Note:

Once this specific specimen is sold, the listing will be updated with a new ammonite fossil of the same species, but with different shape and dimensions. We advise taking a screenshot or saving the listing photo after purchase for your own reference.

Additional information

Era

Jurassic
Origin

Madagascar

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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