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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GRAMMOCERAS striatulum Ammonite Fossil – Upper Toarcian Jurassic, Ravenscar Yorkshire UK
GRAMMOCERAS striatulum Ammonite Fossil – Upper Toarcian Jurassic, Ravenscar Yorkshire UK - Image 2

GRAMMOCERAS striatulum Ammonite Fossil – Upper Toarcian Jurassic, Ravenscar Yorkshire UK

Original price was: £60.00.Current price is: £54.00.

Offered here is a well-preserved fossil of the elegant ammonite GRAMMOCERAS striatulum, collected from the Upper Toarcian Stage of the Jurassic Period, near Ravenscar, Yorkshire, UK. This finely detailed ammonite is a prime example of the region’s exceptional fossil fauna and makes a striking addition to any collection

Fossil Type & Species:

  • Type: Ammonite (Extinct Cephalopod Mollusc)
  • Species: Grammoceras striatulum
  • Noted for its finely ribbed shell and narrow whorl profile

Geological Context:

  • Era: Mesozoic
  • Period: Jurassic
  • Stage: Upper Toarcian (~182–174 million years ago)
  • Formation: Whitby Mudstone Formation or Ravenscar Group equivalent
  • Depositional Environment: Calm, low-energy marine basin with fine-grained mud deposition. Ideal conditions for preserving complete ammonite shells and marine vertebrate fossils

Morphological Features:

  • Compressed, discoidal shell with narrow whorls and very fine striations along the flanks
  • Typically involute with a small umbilicus and sharply defined ribbing
  • Whorl section is laterally compressed, giving the shell a sleek appearance
  • Mineralised shell surface with subtle sheen from shale preservation

Scientific Importance:

  • Grammoceras striatulum is a distinctive ammonite species used in biostratigraphy of the Toarcian stage
  • Helps correlate Upper Jurassic marine beds across Europe
  • Provides insight into ammonite evolution during times of environmental stress and recovery in the Jurassic seas

Locality Information:

  • Ravenscar, Yorkshire, United Kingdom – part of the world-famous Yorkshire Jurassic Coast, a designated UNESCO World Heritage area. Known for yielding exceptional marine fossils from the Lias and Middle Jurassic strata

Authenticity & Display:

All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. The listing photos show the actual fossil you will receive. Please refer to the image for full dimensions – the scale rule cube = 1cm.

This is a classic British Jurassic ammonite, ideal for collectors, educators, or fossil enthusiasts. A beautifully detailed relic of an ancient sea, over 180 million years old.

Add a piece of Yorkshire’s Jurassic heritage to your collection with this exquisite Grammoceras striatulum fossil!

(Actual as seen)

Only 1 left in stock

SKU: UF3454 Category:

Description

Offered here is a well-preserved fossil of the elegant ammonite GRAMMOCERAS striatulum, collected from the Upper Toarcian Stage of the Jurassic Period, near Ravenscar, Yorkshire, UK. This finely detailed ammonite is a prime example of the region’s exceptional fossil fauna and makes a striking addition to any collection

Fossil Type & Species:

  • Type: Ammonite (Extinct Cephalopod Mollusc)
  • Species: Grammoceras striatulum
  • Noted for its finely ribbed shell and narrow whorl profile

Geological Context:

  • Era: Mesozoic
  • Period: Jurassic
  • Stage: Upper Toarcian (~182–174 million years ago)
  • Formation: Whitby Mudstone Formation or Ravenscar Group equivalent
  • Depositional Environment: Calm, low-energy marine basin with fine-grained mud deposition. Ideal conditions for preserving complete ammonite shells and marine vertebrate fossils

Morphological Features:

  • Compressed, discoidal shell with narrow whorls and very fine striations along the flanks
  • Typically involute with a small umbilicus and sharply defined ribbing
  • Whorl section is laterally compressed, giving the shell a sleek appearance
  • Mineralised shell surface with subtle sheen from shale preservation

Scientific Importance:

  • Grammoceras striatulum is a distinctive ammonite species used in biostratigraphy of the Toarcian stage
  • Helps correlate Upper Jurassic marine beds across Europe
  • Provides insight into ammonite evolution during times of environmental stress and recovery in the Jurassic seas

Locality Information:

  • Ravenscar, Yorkshire, United Kingdom – part of the world-famous Yorkshire Jurassic Coast, a designated UNESCO World Heritage area. Known for yielding exceptional marine fossils from the Lias and Middle Jurassic strata

Authenticity & Display:

All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. The listing photos show the actual fossil you will receive. Please refer to the image for full dimensions – the scale rule cube = 1cm.

This is a classic British Jurassic ammonite, ideal for collectors, educators, or fossil enthusiasts. A beautifully detailed relic of an ancient sea, over 180 million years old.

Add a piece of Yorkshire’s Jurassic heritage to your collection with this exquisite Grammoceras striatulum fossil!

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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