Description
Belemnites sulcatus Fossil from South Marston, United Kingdom
This listing is for a genuine Belemnites sulcatus fossil belemnite, originating from the Oxfordian Stage of the Late Jurassic, collected at South Marston in the United Kingdom. Dating back approximately 163–157 million years, this fossil represents the calcified internal guard (rostrum) of a squid-like marine cephalopod. Belemnites are among the most iconic Jurassic fossils, highly valued by collectors for their elegant form and important role in palaeontology.
All fossils offered are 100% genuine specimens and are accompanied by a Certificate of Authenticity. The photographs show the exact fossil you will receive, with 1cm scale rule squares and cube included for accurate sizing.
Geological Age and Provenance
This specimen dates from the Oxfordian Stage of the Late Jurassic Period, a time when warm shallow seas covered much of what is now southern England. These seas supported an abundant diversity of marine life including ammonites, belemnites, bivalves, corals, and marine reptiles.
The South Marston locality in Wiltshire is a classic fossil-bearing site within Oxfordian marine strata. These deposits yield well-preserved belemnite guards that are valuable for both collectors and geologists, providing insight into the Jurassic ecosystems of Britain.
Fossil Type and Scientific Classification
- Genus: Belemnites
- Species: Belemnites sulcatus
- Order: Belemnitida
- Superfamily: Belemnitoidea
- Family: Belemnitidae
Belemnites are extinct relatives of modern squid and cuttlefish. Unlike their soft-bodied descendants, belemnites possessed an internal skeleton, of which the bullet-shaped guard is most often preserved. Belemnites sulcatus is one of the best-known Oxfordian species and is a significant fossil for Late Jurassic stratigraphy.
Morphological Features
The features of Belemnites sulcatus include:
- Bullet-Shaped Guard: Robust, elongated rostrum with a tapering point.
- Sulcate Groove: A distinctive longitudinal groove (sulcus) running along the length of the guard, from which the species takes its name.
- Tapered Apex: A sharp posterior end enhancing streamlining in life.
- Alveolus: A cavity at the anterior end where the phragmocone (chambered shell portion) attached.
These features allowed the belemnite to move efficiently as an active predator, mirroring the lifestyle of modern squid.
Scientific and Collector Importance
Belemnites sulcatus is a key index fossil of the Oxfordian Stage, used by geologists to date and correlate Late Jurassic deposits across Europe. Its restricted range and distinct morphology make it particularly valuable for stratigraphic studies.
Collectors appreciate B. sulcatus for its sleek bullet-like appearance and its role as a classic fossil of the Jurassic seas. Specimens from South Marston are sought after for their provenance and fine preservation, making them desirable additions to both academic and private collections.
Display and Educational Value
This specimen has been carefully chosen for its preservation and distinctive morphological features. Its elegant form makes it a striking display fossil, while its scientific significance adds depth and context.
Ideal for museum displays, teaching specimens, or private fossil collections, this Belemnites sulcatus belemnite from South Marston, United Kingdom offers both aesthetic appeal and scientific value. It represents a direct connection to the warm Jurassic seas of southern England over 160 million years ago and is a timeless piece of Earth’s natural history.
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