Description
Authentic Ampyx mammillatus Trilobite Fossil from the Ordovician of Wales
This genuine fossil specimen of Ampyx mammillatus is a beautifully preserved trilobite from the famous Meadowtown Beds of Meadowtown Quarry, Powys, Wales, UK. Dating to the Middle Ordovician period (Darriwilian stage), this remarkable arthropod fossil represents marine life that lived approximately 460–467 million years ago. Trilobites are among the most iconic and scientifically significant fossils of the Palaeozoic Era, and Ampyx mammillatus is particularly sought after for its distinctive morphology and well-documented geological context.
The fossil shown in the photographs is the exact specimen you will receive. It has been carefully selected for quality and authenticity and comes with a Certificate of Authenticity lifetime guarantee card, confirming that the fossil is a genuine natural specimen.
Full dimensions can be seen in the photographs provided.
Geological Age and Formation
This trilobite originates from the Meadowtown Beds, a well-known Ordovician fossil-bearing sequence exposed at Meadowtown Quarry in Powys, Wales. The Meadowtown Beds belong to the Shelve Inlier, a geological area famous for producing diverse marine fossils from the Ordovician seas.
During the Darriwilian stage of the Middle Ordovician, much of what is now the United Kingdom was located in southern tropical latitudes and covered by shallow epicontinental seas. Fine marine sediments accumulated on the seafloor, preserving an extraordinary variety of marine organisms including trilobites, brachiopods, echinoderms, and graptolites.
The sediments of the Meadowtown Beds were deposited in a marine shelf environment, where calm seabed conditions allowed delicate fossils to be preserved within fine-grained mudstones and shales.
About the Trilobite Species Ampyx mammillatus
Ampyx mammillatus is a member of the Order Asaphida, within the Superfamily Raphiophoroidea. Trilobites of the genus Ampyx are particularly recognizable due to their elongated cephalic spines and streamlined body shape.
Key morphological features of Ampyx mammillatus include:
- A distinctive long forward-projecting spine extending from the glabella on the cephalon
- A smooth, rounded exoskeleton with minimal ornamentation
- Well-defined thoracic segments allowing flexibility and movement along the seabed
- A pygidium (tail shield) that is relatively small compared to the cephalon
The long frontal spine is thought to have had sensory or stabilizing functions, possibly helping the trilobite navigate soft sediment environments. Fossil evidence suggests that some Ampyx species may have exhibited social behaviour, as mass groupings of related species have been discovered preserved together in Ordovician sediments.
Life in the Ordovician Seas
During the Ordovician period, trilobites such as Ampyx mammillatus thrived on the seafloor as benthic organisms. They likely moved across the sediment in search of organic particles, small organisms, and detritus. Their segmented exoskeleton allowed flexibility while their calcified shells provided protection against predators.
The Ordovician period is known for one of the greatest diversifications of marine life in Earth’s history, often called the Great Ordovician Biodiversification Event (GOBE). Trilobites were among the dominant arthropods of these ancient oceans and are today key index fossils used by palaeontologists to study Ordovician ecosystems and stratigraphy.
Collector Information
- Species: Ampyx mammillatus
- Fossil Type: Trilobite
- Geological Age: Ordovician, Darriwilian Stage (Middle Ordovician)
- Formation: Meadowtown Beds
- Locality: Meadowtown Quarry, Powys, Wales, United Kingdom
- Authenticity: 100% genuine fossil specimen
- Documentation: Includes Certificate of Authenticity lifetime guarantee card
- Display: The fossil photographed is the exact specimen supplied
This trilobite fossil is an excellent collector’s piece from a classic British Ordovician locality and represents a fascinating example of early arthropod life from nearly half a billion years ago. It makes a superb addition to any fossil collection, geological display, educational set, or natural history collection.
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