Stiphothyris tumida Fossil Brachiopod – Jurassic Bajocian – Inferior Oolite – Gloucestershire UK – 100% Genuine with Certificate

Description

Stiphothyris tumida Fossil Brachiopod

Inferior Oolite Formation, Bajocian Stage, Jurassic Period – Gloucestershire, United Kingdom

Species: Stiphothyris tumida

Order: Terebratulida

Superfamily: Terebratuloidea

Family: Stiphothyrididae

Geological Formation: Inferior Oolite Group

Geological Age: Middle Jurassic

Stage: Bajocian (approx. 170–168 million years ago)

Provenance: Gloucestershire, United Kingdom

Scale Reference: 1cm cube visible in image; full sizing as per photo.

Authenticity: Includes Certificate of Authenticity

Photography: The image shows the actual fossil you will receive.

MORPHOLOGICAL & GEOLOGICAL CONTEXT:

Stiphothyris tumida is a well-known terebratulid brachiopod characteristic of the Inferior Oolite Formation, deposited in a shallow marine carbonate platform environment typical of the Middle Jurassic Bajocian Stage. The Inferior Oolite of Gloucestershire is renowned for its fossil-rich oolitic limestones, indicative of high-energy shallow shelf deposition in a warm, subtropical sea.

• Morphological Features:
• Stiphothyris tumida is identified by its thick-shelled, biconvex valves, with a smooth to faintly ribbed surface, a short hingeline, and a prominent beak. It has a strong pedicle opening, typical of the Terebratulida, and a relatively tumid (swollen) appearance — hence the name “tumida.”
• Depositional Environment:
• Fossils from the Inferior Oolite are typically preserved within oolitic limestone — a marine sediment made up of ooids formed in warm, agitated water. Brachiopods such as Stiphothyris tumida would have lived attached to hard substrates in these shallow waters.
• Stratigraphic Significance:
• While this species is widespread in the Bajocian stage of the Middle Jurassic, it may help constrain strata within the Discites Zone of the Inferior Oolite, although exact biozone placement for this specimen is undetermined.
• Notable Information:
• Stiphothyris tumida was originally described in the 19th century and is one of the key diagnostic brachiopod species used in British Middle Jurassic biostratigraphy. Its robust shell and regular appearance in the fossil record make it a classic collector’s specimen.

ABOUT THIS SPECIMEN:

This is a carefully selected fossil brachiopod specimen of Stiphothyris tumida, collected from the historically rich Inferior Oolite limestones of Gloucestershire, UK. It is a genuine Jurassic fossil from a classic site with scientific and display value. The fossil has been prepared to best show its natural form and features.

The fossil comes from our trusted Alice Purnell Collection and is presented exactly as shown in the photo — no stock imagery used. Scale cube = 1cm.

YOU WILL RECEIVE:

• 1 x Stiphothyris tumida Fossil Brachiopod
• From the Inferior Oolite Formation, Bajocian Stage, Jurassic
• Collected in Gloucestershire, United Kingdom
• Supplied with Certificate of Authenticity
• The actual fossil photographed
• From the Alice Purnell Collection

SUMMARY:

A fantastic genuine example of Stiphothyris tumida from the Middle Jurassic of Gloucestershire. A perfect specimen for fossil collectors, educators, or enthusiasts of brachiopods and British Jurassic geology. Supplied with provenance and certification.