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 lytocrioceras heteromorph fossil ammonite – lower aalenian, jurassic, rhône, france – genuine specimen with coa
Rare lytocrioceras heteromorph fossil ammonite – lower aalenian, jurassic, rhône, france – genuine specimen with coa - Image 2

Rare lytocrioceras heteromorph fossil ammonite – lower aalenian, jurassic, rhône, france – genuine specimen with coa

£60.00

This is a rare Lytocrioceras heteromorph fossil ammonite, dating to the Lower Aalenian stage of the Middle Jurassic (~174-170 million years ago), discovered in Rhône, France. Lytocrioceras is a fascinating heteromorph ammonite, meaning it had a shell that did not follow the typical coiled structure seen in most ammonites. Instead, it exhibited an irregular, loosely coiled form, an adaptation that likely influenced its buoyancy and swimming behavior in Jurassic seas.

Fossils from the Aalenian stage are significantly rarer than those from other Jurassic stages, making this specimen a highly collectible and scientifically valuable piece. Its unique shell structure provides insight into the evolutionary diversity of ammonites during the Middle Jurassic.

Geological Information:

  • Formation: Jurassic Marine Deposits
  • Stage: Lower Aalenian, Middle Jurassic (~174-170 million years old)
  • Location: Rhône, France
  • Depositional Environment: Shallow marine seafloor with fine-grained sedimentation

Fossil Characteristics:

  • Heteromorph ammonite with an unusual shell structure
  • Well-defined growth lines and preserved suture patterns
  • Rare Middle Jurassic ammonite from Rhône, France
  • Highly collectible due to its rarity and scientific importance

Key Features:

  • Authentic Lytocrioceras fossil ammonite
  • Rare and scientifically valuable heteromorph specimen from the Aalenian stage
  • From the Alice Purnell Collection
  • 100% genuine specimen with Certificate of Authenticity

Scale Rule / Cube = 1cm – Please refer to the photos for accurate sizing.

All fossils are securely packaged for worldwide shipping.

(Actual as seen)

Out of stock

SKU: AF0561 Category:

Description

This is a rare Lytocrioceras heteromorph fossil ammonite, dating to the Lower Aalenian stage of the Middle Jurassic (~174-170 million years ago), discovered in Rhône, France. Lytocrioceras is a fascinating heteromorph ammonite, meaning it had a shell that did not follow the typical coiled structure seen in most ammonites. Instead, it exhibited an irregular, loosely coiled form, an adaptation that likely influenced its buoyancy and swimming behavior in Jurassic seas.

Fossils from the Aalenian stage are significantly rarer than those from other Jurassic stages, making this specimen a highly collectible and scientifically valuable piece. Its unique shell structure provides insight into the evolutionary diversity of ammonites during the Middle Jurassic.

Geological Information:

  • Formation: Jurassic Marine Deposits
  • Stage: Lower Aalenian, Middle Jurassic (~174-170 million years old)
  • Location: Rhône, France
  • Depositional Environment: Shallow marine seafloor with fine-grained sedimentation

Fossil Characteristics:

  • Heteromorph ammonite with an unusual shell structure
  • Well-defined growth lines and preserved suture patterns
  • Rare Middle Jurassic ammonite from Rhône, France
  • Highly collectible due to its rarity and scientific importance

Key Features:

  • Authentic Lytocrioceras fossil ammonite
  • Rare and scientifically valuable heteromorph specimen from the Aalenian stage
  • From the Alice Purnell Collection
  • 100% genuine specimen with Certificate of Authenticity

Scale Rule / Cube = 1cm – Please refer to the photos for accurate sizing.

All fossils are securely packaged for worldwide shipping.

Additional information

Weight 0.1 g
Dimensions 10 × 10 × 10 cm
Era

Jurassic
Origin

France

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