Cameroalerus obtusa Fossil Echinoid Chalk Cretaceous Sussex UK Genuine Sea Urchin

Description

Authentic Cameroalerus obtusa Fossil Echinoid from Sussex, UK

This listing presents a genuine Cameroalerus obtusa fossil echinoid, carefully collected from the famous Chalk deposits of Sussex, United Kingdom. Dating from the Cretaceous Period, this specimen represents a striking example of echinoid diversity during one of the most important marine intervals in Earth’s history. The fossil pictured is the exact specimen you will receive, with a 1 cm scale cube included for reference. Every piece comes with a Certificate of Authenticity, guaranteeing that it is a 100% genuine natural fossil.

Geological Setting

The chalk formations of southern England, including those exposed in Sussex, were laid down between 100 and 66 million years ago in the Late Cretaceous. These rocks formed in a shallow, warm epicontinental sea that once covered much of Europe. Over time, the microscopic remains of calcareous plankton accumulated to form the iconic white chalk, preserving an abundance of marine fossils such as ammonites, belemnites, and echinoids.

Scientific Classification

• Kingdom: Animalia
• Phylum: Echinodermata
• Class: Echinoidea
• Order: Spatangoida
• Family: Spatangidae
• Genus: Cameroalerus
• Species: Cameroalerus obtusa

Morphological Features

Cameroalerus obtusa is a distinctive heart urchin echinoid with a compact, rounded test (outer shell) and a subtle anterior groove. Its overall form is adapted to burrowing within soft chalk sediments, with a slightly inflated dorsal surface and a flatter ventral side that allowed it to move efficiently beneath the seafloor. Like other spatangoid echinoids, it possessed specialized ambulacral areas arranged in a petal-like pattern on the upper surface, which were used for respiration and sediment feeding. The mouth and anus are offset, further supporting its burrowing lifestyle.

Paleoecology and Adaptations

During the Cretaceous, echinoids such as Cameroalerus obtusa thrived in chalk seafloor environments, where they lived as deposit feeders. Burrowed within the substrate, they ingested sediment and extracted nutrients from organic matter. Their streamlined morphology reflects millions of years of evolutionary adaptation to this lifestyle, while their abundance in certain chalk layers makes them key indicators of paleoenvironmental conditions.

Stratigraphic and Scientific Significance

Fossils of Cameroalerus obtusa are particularly valuable for understanding the biodiversity of chalk echinoids. The genus is associated with specific biozones of the Cretaceous chalk, helping paleontologists refine stratigraphic correlations. These echinoids are also important in paleoecological studies, as they illustrate the range of burrowing strategies and evolutionary specialization within spatangoid echinoids.

Collectability and Display

This fossil echinoid is both scientifically important and visually appealing. Its natural heart-shaped outline and fine preservation make it a desirable addition to fossil collections, particularly those focused on Cretaceous marine life or British chalk fossils. Whether displayed as a collector’s specimen or studied for its paleontological features, Cameroalerus obtusa holds significant value.

Guaranteed Authenticity

All of our fossils are supplied with a Certificate of Authenticity and are guaranteed to be 100% genuine specimens. The fossil pictured in this listing is the exact piece you will receive. This Cameroalerus obtusa echinoid fossil from the Cretaceous chalk of Sussex represents both an elegant natural object and a piece of Earth’s deep history, making it an excellent acquisition for collectors, educators, or enthusiasts of natural history.