Description
Offered here is a beautiful Schloenbachia leonensis (intermediate form) ammonite fossil from the Duck Creek Formation, located at Spring Creek, Cooke County, Texas, USA. This specimen is dated to the Upper Albian Stage of the Cretaceous Period (circa 105 million years ago), and showcases transitional features within this taxon.
This fossil is 100% genuine and comes with a Certificate of Authenticity. The photo shows the exact specimen you will receive. Cube = 1cm; please refer to the image for full size and proportions.
Geological & Palaeontological Details:
- Fossil Type: Ammonite (extinct marine mollusc)
- Species: Schloenbachia leonensis (intermediate form)
- Family: Schloenbachiidae
- Superfamily: Hoplitoidea
- Order: Ammonitida
- Geological Formation: Duck Creek Formation
- Geological Stage: Upper Albian (Cretaceous)
- Depositional Environment: Shallow marine platform of the Western Interior Seaway, with fine sediments supporting high fossil preservation
- Biozone Use: The genus Schloenbachia has biostratigraphic utility in correlating Upper Albian to Lower Cenomanian marine beds
Morphology & Features:
- Exhibits characteristics of both compressed and evolute forms, indicative of an intermediate evolutionary stage
- Moderate involution, visible umbilicus, and distinctive ribbing patterns with minor tubercles present
- Preserved suture lines and ornamentation reveal exquisite shell architecture
Scientific Context & Significance: Schloenbachia is known for its evolutionary significance during the Albian-Cenomanian transition. The intermediate form of S. leonensis is valuable for understanding phylogenetic development within the genus. Originally described from Gulf Coastal Plain formations, it serves as an important regional fossil in North American stratigraphy.
Display & Collector Suitability:
- Scale cube = 1cm
- Exact fossil as shown in photos
- A scientifically interesting and visually appealing specimen
- Suitable for collectors, museums, educators, or fossil lovers
Why Purchase from Us?
- All fossils are 100% authentic and responsibly sourced
- Each item includes a Certificate of Authenticity
- Professionally cleaned and selected for quality and presentation
Secure a unique and scientifically notable ammonite fossil for your collection with this Schloenbachia leonensis intermediate from the Cretaceous seas of ancient Texas.
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