Description
Phymatospongia sp. Fossil Sponge
This genuine Phymatospongia sp. fossil sponge is a carefully selected Upper Cenomanian specimen from Glynde, East Sussex, UK. Dating to the Upper Cretaceous Period, this fossil represents an interesting example of ancient sponge life from the warm chalk seas that once covered much of southern Britain.
The fossil shown in the photograph is the actual specimen you will receive. It has been carefully chosen as an individual collectable fossil, making it ideal for fossil collectors, chalk fossil enthusiasts, geology students, educational displays, natural history collections, and anyone interested in British Cretaceous marine life. Full sizing can be seen in the photo.
Genuine Fossil with Certificate of Authenticity
This fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card. The listing photograph shows the exact fossil supplied, so you can purchase with confidence knowing this is the actual specimen that will be sent.
Fossil sponges are fascinating marine fossils because they represent one of the oldest and most enduring groups of animals in Earth history. Unlike ammonites or nautiloids, which were active swimming cephalopods, sponges lived attached to the sea floor and filtered tiny food particles from the surrounding water. Their bodies were supported by mineral structures known as spicules, which could be preserved in chalk and other marine sediments under the right conditions.
Geology and Age
This specimen dates to the Upper Cenomanian stage of the Upper Cretaceous Period, approximately 96 to 94 million years old. The Cenomanian was a major interval in British geological history, when rising sea levels spread warm, shallow marine waters across large areas of what is now southern England.
During the Upper Cenomanian, the Glynde area of East Sussex lay beneath a broad marine sea connected to the wider Cretaceous chalk seas of Britain and Europe. Fine carbonate-rich sediment accumulated slowly on the sea floor, later forming chalk and related deposits. These ancient waters supported a rich marine ecosystem that included sponges, ammonites, nautiloids, bivalves, echinoids, fish, and many other organisms.
Fossils from this interval are especially interesting because they record marine life during a time of significant environmental change near the close of the Cenomanian. The chalk sea environment was generally warm, open, and carbonate-rich, providing suitable conditions for filter-feeding organisms such as sponges to thrive on the sea floor.
Species and Scientific Interest
Phymatospongia is a fossil sponge genus associated with Cretaceous marine deposits. As a Phymatospongia sp. specimen, this fossil is identified to genus level, making it a desirable example of a chalk sponge from the Upper Cenomanian of southern England.
Sponges such as Phymatospongia formed part of the benthic community, living on or near the seabed rather than swimming through the water column. Their filter-feeding lifestyle helped them extract nutrients from seawater, while their skeletal structure allowed them to maintain a stable body form in the marine environment. Depending on preservation, fossil sponges may show textured surfaces, irregular growth forms, porous structures, or traces of the original sponge architecture.
Phymatospongia fossils are appealing because they represent a very different type of fossil from the more commonly collected ammonites, belemnites, or shells. They provide insight into the quieter sea-floor ecosystems of the Cretaceous chalk seas and help show the diversity of life that existed beneath the ancient waters covering southern Britain.
Glynde, East Sussex Locality
This fossil comes from Glynde, East Sussex, UK, a locality within the chalk landscapes of southern England. East Sussex is well known for its Cretaceous geology, with chalk downs and fossil-bearing deposits that preserve evidence of the marine environments that existed during the Late Cretaceous.
A fossil sponge from Glynde has excellent locality interest for collectors of Sussex fossils, British fossils, chalk fossils, fossil sponges, and Upper Cretaceous marine life. Locality information adds scientific and collectable value because it connects the specimen to a specific place, geological age, and ancient environment.
Display and Collectability
This Phymatospongia sp. fossil sponge is an excellent addition to a fossil cabinet, educational collection, display shelf, or specialist collection of British Cretaceous fossils. Its Upper Cenomanian age, Glynde East Sussex provenance, chalk-sea origin, and genuine Certificate of Authenticity make it a desirable specimen for both new and experienced collectors.
With its connection to the warm Cretaceous seas of southern England, this fossil is ideal for anyone interested in prehistoric marine ecosystems, fossil sponges, chalk fossils, British geology, or natural history display specimens. Carefully selected and photographed individually, this genuine fossil is supplied exactly as shown, giving you a well-documented specimen for study, display, or collection.
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