Description
A magnificent and very rare 7.5-inch fossil ammonite: Labyrinthoceras perexpansum from the Middle Bajocian Stage of the Jurassic Period, discovered in the classic marine fossil beds of Burton Bradstock, Dorset, United Kingdom. This strikingly preserved specimen is an excellent representation of a genus known for its elaborate shell coiling and scientific relevance.
This listing features the exact specimen shown in the photographs, with a 1cm scale cube included for accurate size reference. Please refer to the images for detailed visual inspection and sizing.
Geological & Palaeontological Information:
- Fossil Type: Ammonite
- Species: Labyrinthoceras perexpansum (originally described by S.S. Buckman)
- Geological Period: Jurassic
- Stage: Middle Bajocian (~170 to 168 million years ago)
- Location: Burton Bradstock, Dorset, England, UK
- Depositional Environment: Shallow epicontinental sea with marl and limestone sedimentation typical of the Inferior Oolite Group
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Morphoceratidae
- Zone (Inferred): Likely from the Parkinsoni Zone, a classic Bajocian ammonite biozone
Morphological Features:
- Characteristic extremely evolute shell with open coiling and widely spaced whorls
- Sharp ribbing radiating from the umbilicus, often bifurcating or trifurcating
- Deep umbilicus and broad whorl section
- Complex suture lines and fine detail across the flanks
- Majestic spiral structure makes it highly recognisable and collectable
Notable Points:
- Labyrinthoceras perexpansum is a diagnostic ammonite for the Middle Bajocian, used in Jurassic stratigraphy and regional correlations
- Fossils of this size and completeness are seldom available due to limited exposures and increasing restrictions on fossil hunting in the area
- Burton Bradstock is part of the Jurassic Coast UNESCO World Heritage Site, renowned for yielding high-quality marine fossils
Why This Fossil is Outstanding:
- Museum-quality and scientifically important ammonite specimen
- Rare British ammonite species with large size and dramatic morphology
- Ethically sourced and supplied with a Certificate of Authenticity
- Ideal for fossil collectors, museum display, educational use, or interior natural decor
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