Description
This listing offers a genuine Androgynoceras hybridum fossil ammonite, dating from the Lower Pliensbachian stage of the Early Jurassic, collected from the classic fossil locality of Blockley, United Kingdom. A well-preserved and scientifically valuable piece, this ammonite displays the fine ribbing and elegant coiling that define the genus Androgynoceras.
- Fossil Type: Ammonite (extinct marine cephalopod)
- Species: Androgynoceras hybridum
- Size: Please refer to photo with 1cm scale cube for precise sizing
- Geological Period: Jurassic
- Stage: Lower Pliensbachian (~190–183 million years ago)
- Zone (where applicable): Jamesoni or Ibex Zone (commonly associated with A. hybridum)
- Family: Liparoceratidae
- Superfamily: Eoderoceratoidea
- Order: Ammonitida
- Locality: Blockley, Gloucestershire, England, UK
- Preservation: Very good, with strong ribbing and a natural matrix; no restoration
- Depositional Environment: Shallow marine basin with fine mudstone and limestone deposition during early Jurassic transgression
Geological & Scientific Significance:
Androgynoceras hybridum is a well-documented ammonite species in the Lower Pliensbachian faunal sequence, particularly in the Ibex to Davoei zones, and is used for biostratigraphic correlation in British and European Jurassic marine strata. These ammonites are characterised by their evolute coiling, prominent ribbing, and occasionally tuberculate ornamentation.
The Blockley area is part of the Lower Lias Group, rich in ammonite fossils and known for exposures of marine shales and limestones from the Early Jurassic. This area has been studied for over a century and continues to provide excellent examples of marine faunal succession and ecological adaptation.
Androgynoceras is sometimes noted for its transitional morphology between earlier and later Eoderoceratoid forms, making it of particular interest to collectors and researchers.
Notable Features:
- Strong, prominent ribbing and classic evolute shell
- Well-defined preservation with visible whorls
- From the historically important Blockley site in Gloucestershire
- Valuable for collectors, educators, or as a statement piece in display
Authenticity Guaranteed: All of our fossils are 100% genuine. This ammonite is supplied with a Certificate of Authenticity to confirm its scientific identity and provenance.
Photo Disclosure: You will receive the exact fossil shown. The accompanying scale cube is 1cm per square for accurate measurement.
A classic British ammonite with historical and geological value, this Androgynoceras hybridum fossil makes an exceptional addition to any fossil collection or natural history display.
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