Description
This listing is for a rare and authentic specimen of Ludwigia murchisoni, a fossil ammonite from the Aalenian Stage of the Middle Jurassic, collected from the Glastonbury area, Somerset, United Kingdom. This beautifully preserved fossil dates to around 174 to 170 million years ago, making it a scientifically important and visually striking example of early Middle Jurassic cephalopods.
Scale Rule Squares / Cube = 1cm
For exact sizing, please refer to the photos. You will receive the actual specimen shown in the listing images.
All of our Fossils are 100% Genuine Specimens and come with a Certificate of Authenticity.
Fossil & Geological Information:
- Fossil Type: Ammonite
- Genus: Ludwigia
- Species: Ludwigia murchisoni
- Order: Ammonitida
- Superfamily: Hammatoceratoidea
- Family: Graphoceratidae
- Geological Period: Jurassic
- Geological Stage: Aalenian (Middle Jurassic)
- Age: Approx. 174–170 million years ago
- Location: Glastonbury, Somerset, United Kingdom
- Formation: Lower Inferior Oolite or equivalent Aalenian deposits
- Depositional Environment: Warm, shallow marine environment—typically part of a carbonate platform or shelf with fine-grained sediment deposition
Morphology & Features:
Ludwigia murchisoni is notable for its:
- Moderately involute coiling with exposed inner whorls
- Fine, well-developed ribbing, often bifurcating from the umbilical shoulder
- Sharp keel and deep constrictions typical of graphoceratids
- Slender, compressed whorl cross-section giving it a streamlined appearance
- Tectonic deformation is occasionally present in UK specimens but is minimal in well-preserved individuals like this one
These features not only make it identifiable but also help in biostratigraphic correlation, making this species an important index fossil for the Aalenian.
Collector & Scientific Relevance:
Specimens like this are valuable for:
- Academic study and geological teaching
- Museum and private fossil collections
- Biostratigraphy and age dating of Aalenian rocks
- Enthusiasts of ammonites and early Middle Jurassic marine life
Ludwigia murchisoni has been a cornerstone in refining zonal stratigraphy in Europe, with zones such as the Murchisonae Biozone potentially referencing this species. It was likely first formally described by Sowerby in the 19th century, and remains widely cited in paleontological literature.
What You’ll Receive:
- One authentic Ludwigia murchisoni ammonite fossil
- Certificate of Authenticity
- Secure packaging and tracked shipping
- The exact specimen shown in the photographs
Add this exceptional ammonite to your collection today—whether for scientific interest, educational purposes, or its stunning aesthetic value.





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