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 4.5" ASTEROCERAS STELLARE Ammonite Fossil Lower Jurassic Frodingham Ironstone Scunthorpe UK Authentic Specimen
RARE 4.5" ASTEROCERAS STELLARE Ammonite Fossil Lower Jurassic Frodingham Ironstone Scunthorpe UK Authentic Specimen - Image 2
RARE 4.5" ASTEROCERAS STELLARE Ammonite Fossil Lower Jurassic Frodingham Ironstone Scunthorpe UK Authentic Specimen - Image 3

RARE 4.5″ ASTEROCERAS STELLARE Ammonite Fossil Lower Jurassic Frodingham Ironstone Scunthorpe UK Authentic Specimen

Original price was: £480.00.Current price is: £384.00.

This listing features a RARE 4.5″ ammonite fossil of Asteroceras stellare, found in the Frodingham Ironstone Formation at Conesby Quarry, near Scunthorpe, North Lincolnshire, England. This beautifully preserved specimen is from the Lower Lias Group, specifically the Denotatus Subzone of the Obtusum Zone, Lower Sinemurian Stage, and comes with a Certificate of Authenticity.

Asteroceras stellare is a classic species from the early Jurassic and belongs to:

  • Order: Ammonitida
  • Superfamily: Psilocerataceae
  • Family: Arietitidae

This ammonite is a key component of the early Sinemurian marine fauna and is used biostratigraphically to correlate Lower Jurassic strata across Europe. The Frodingham Ironstone Formation was deposited in a shallow marine, iron-rich sedimentary environment, dating to approximately 199–197 million years ago.

Morphological Features:

  • Large, evolute shell with widely spaced whorls
  • Coarse radial ribbing extending across the venter
  • Broad umbilicus with strong, well-defined ornamentation
  • Suture lines with distinct lobes and saddles

These features not only make Asteroceras stellare highly recognisable, but also highly desirable for collectors and researchers alike due to its preservation, rarity, and size.

Specimen Details:

  • Species: Asteroceras stellare
  • Fossil Type: Ammonite Shell
  • Size: 4.5 inches (11.5 cm approx.)
  • Geological Formation: Frodingham Ironstone Formation
  • Biozone/Subzone: Obtusum Zone / Denotatus Subzone
  • Geological Stage: Lower Sinemurian, Lower Jurassic
  • Location: Conesby Quarry, Scunthorpe, North Lincolnshire, England
  • Depositional Environment: Shallow marine, iron-rich platform
  • Family: Arietitidae

This is a rare opportunity to own a museum-grade specimen of a 4.5″ ammonite from a classic Lower Jurassic British locality. Ideal for display, study, or as a centrepiece in any fossil collection.

Scale rule squares/cube = 1cm. Please refer to the photo for accurate size and detail.

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

(Actual as seen)

Includes a fully hand-signed Premium Certificate of Authenticity.

Only 1 left in stock

SKU: UF3474 Category:

Description

This listing features a RARE 4.5″ ammonite fossil of Asteroceras stellare, found in the Frodingham Ironstone Formation at Conesby Quarry, near Scunthorpe, North Lincolnshire, England. This beautifully preserved specimen is from the Lower Lias Group, specifically the Denotatus Subzone of the Obtusum Zone, Lower Sinemurian Stage, and comes with a Certificate of Authenticity.

Asteroceras stellare is a classic species from the early Jurassic and belongs to:

  • Order: Ammonitida
  • Superfamily: Psilocerataceae
  • Family: Arietitidae

This ammonite is a key component of the early Sinemurian marine fauna and is used biostratigraphically to correlate Lower Jurassic strata across Europe. The Frodingham Ironstone Formation was deposited in a shallow marine, iron-rich sedimentary environment, dating to approximately 199–197 million years ago.

Morphological Features:

  • Large, evolute shell with widely spaced whorls
  • Coarse radial ribbing extending across the venter
  • Broad umbilicus with strong, well-defined ornamentation
  • Suture lines with distinct lobes and saddles

These features not only make Asteroceras stellare highly recognisable, but also highly desirable for collectors and researchers alike due to its preservation, rarity, and size.

Specimen Details:

  • Species: Asteroceras stellare
  • Fossil Type: Ammonite Shell
  • Size: 4.5 inches (11.5 cm approx.)
  • Geological Formation: Frodingham Ironstone Formation
  • Biozone/Subzone: Obtusum Zone / Denotatus Subzone
  • Geological Stage: Lower Sinemurian, Lower Jurassic
  • Location: Conesby Quarry, Scunthorpe, North Lincolnshire, England
  • Depositional Environment: Shallow marine, iron-rich platform
  • Family: Arietitidae

This is a rare opportunity to own a museum-grade specimen of a 4.5″ ammonite from a classic Lower Jurassic British locality. Ideal for display, study, or as a centrepiece in any fossil collection.

Scale rule squares/cube = 1cm. Please refer to the photo for accurate size and detail.

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

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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