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RARE Brasilia (Lioceras) bradfordensis Fossil Ammonite – Aalenian, Jurassic – Horn Park Dorset UK – COA – Alice Purnell Collection
RARE Brasilia (Lioceras) bradfordensis Fossil Ammonite – Aalenian, Jurassic – Horn Park Dorset UK – COA – Alice Purnell Collection - Image 2
RARE Brasilia (Lioceras) bradfordensis Fossil Ammonite – Aalenian, Jurassic – Horn Park Dorset UK – COA – Alice Purnell Collection - Image 3

RARE Brasilia (Lioceras) bradfordensis Fossil Ammonite – Aalenian, Jurassic – Horn Park Dorset UK – COA – Alice Purnell Collection

£36.00

An excellent and rare specimen of Brasilia (Lioceras) bradfordensis, a well-preserved ammonite from the Aalenian Stage of the Middle Jurassic, discovered at the classic locality of Horn Park, Dorset, United Kingdom. This piece is part of the notable Alice Purnell Collection, and the photo shows the exact fossil you will receive.

Geological Context:

  • Species: Brasilia (Lioceras) bradfordensis
  • Geological Period: Jurassic
  • Stage: Aalenian (~174.1 – 170.3 million years ago)
  • Location: Horn Park, Dorset, UK
  • Depositional Environment: Marine shelf environment typical of the Inferior Oolite Group, composed of well-cemented oolitic limestones and marly beds deposited in a shallow, warm sea during a phase of moderate transgression

Taxonomic Classification:

  • Family: Graphoceratidae
  • Superfamily: Hildoceratoidea
  • Order: Ammonitida
  • Suborder: Ammonitina
  • Originally described by: S.S. Buckman (early 20th century)

Morphological Features:

Brasilia (Lioceras) bradfordensis is known for its compressed, involute shell with narrow whorls and a relatively small umbilicus. The ribs are sinuous and sharp, often bifurcating or trifurcating low on the flanks and crossing the venter uninterrupted. It typically exhibits a keel-less venter and strong suture lines with finely incised lobes.

This specimen displays excellent rib symmetry and whorl preservation, making it a scientifically significant and visually appealing ammonite ideal for collectors.

Stratigraphic and Scientific Importance:

This species occurs within the Murchisonae Subzone of the Aalenian Stage, and is an important faunal component in refining regional ammonite biostratigraphy. Its presence at Horn Park, a designated National Nature Reserve and classic British fossil site, enhances its value both scientifically and historically.

Brasilia and its close relatives such as Lioceras are critical for understanding the morphological transitions within graphoceratid ammonites during the early Middle Jurassic.

Additional Details:

  • All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
  • Scale Rule Squares / Cube = 1cm – Please refer to the photo for exact size and detail.
  • From the scientifically respected Alice Purnell Collection.

A classic ammonite from a historically rich Jurassic site, this Brasilia (Lioceras) bradfordensis specimen is a rare and refined addition to any collection, research archive, or fossil display.

Secure this genuine piece of Jurassic marine heritage today.

(Actual as seen)

Out of stock

SKU: AF1270 Category:

Description

An excellent and rare specimen of Brasilia (Lioceras) bradfordensis, a well-preserved ammonite from the Aalenian Stage of the Middle Jurassic, discovered at the classic locality of Horn Park, Dorset, United Kingdom. This piece is part of the notable Alice Purnell Collection, and the photo shows the exact fossil you will receive.

Geological Context:

  • Species: Brasilia (Lioceras) bradfordensis
  • Geological Period: Jurassic
  • Stage: Aalenian (~174.1 – 170.3 million years ago)
  • Location: Horn Park, Dorset, UK
  • Depositional Environment: Marine shelf environment typical of the Inferior Oolite Group, composed of well-cemented oolitic limestones and marly beds deposited in a shallow, warm sea during a phase of moderate transgression

Taxonomic Classification:

  • Family: Graphoceratidae
  • Superfamily: Hildoceratoidea
  • Order: Ammonitida
  • Suborder: Ammonitina
  • Originally described by: S.S. Buckman (early 20th century)

Morphological Features:

Brasilia (Lioceras) bradfordensis is known for its compressed, involute shell with narrow whorls and a relatively small umbilicus. The ribs are sinuous and sharp, often bifurcating or trifurcating low on the flanks and crossing the venter uninterrupted. It typically exhibits a keel-less venter and strong suture lines with finely incised lobes.

This specimen displays excellent rib symmetry and whorl preservation, making it a scientifically significant and visually appealing ammonite ideal for collectors.

Stratigraphic and Scientific Importance:

This species occurs within the Murchisonae Subzone of the Aalenian Stage, and is an important faunal component in refining regional ammonite biostratigraphy. Its presence at Horn Park, a designated National Nature Reserve and classic British fossil site, enhances its value both scientifically and historically.

Brasilia and its close relatives such as Lioceras are critical for understanding the morphological transitions within graphoceratid ammonites during the early Middle Jurassic.

Additional Details:

  • All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
  • Scale Rule Squares / Cube = 1cm – Please refer to the photo for exact size and detail.
  • From the scientifically respected Alice Purnell Collection.

A classic ammonite from a historically rich Jurassic site, this Brasilia (Lioceras) bradfordensis specimen is a rare and refined addition to any collection, research archive, or fossil display.

Secure this genuine piece of Jurassic marine heritage today.

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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