Amaltheus subnodosus Fossil Ammonite, Upper Pliensbachian, Jurassic: Staithes, Yorkshire, United Kingdom – COA

Description

This Amaltheus subnodosus fossil ammonite is a stunning specimen from the Upper Pliensbachian Stage of the Jurassic Period, discovered in Staithes, Yorkshire, United Kingdom. Amaltheus subnodosus is a well-known ammonite species, recognized for its distinctive, ribbed, and smooth shell with nodule-like features. This ammonite fossil provides a unique glimpse into the marine ecosystems of the Upper Pliensbachian period and represents a fascinating piece of ancient marine history.

Geological Information:

• Geological Stage: Upper Pliensbachian, Jurassic (Approximately 183 to 174 million years ago)
• Depositional Environment: During the Upper Pliensbachian, shallow marine seas covered much of what is now Yorkshire, including Staithes, where this ammonite was found. These seas supported a wide variety of marine organisms, including ammonites like Amaltheus subnodosus. The fossil was preserved in sedimentary rock, primarily limestone and marl, formed by the accumulation of marine life over millions of years. The Jurassic seas were rich in nutrients, supporting an abundant array of marine organisms, including ammonites, bivalves, and plankton.
• Biozone: This fossil comes from the Upper Pliensbachian biozone, a period marked by the thriving of ammonites and other marine life. The Pliensbachian biozone is crucial for understanding the diversification of marine life during the Jurassic Period.

Fossil Features:

• Family: Ammonitidae
• Super Family: Ammonoidea
• Order: Ammonitida
• Morphology: The Amaltheus subnodosus ammonite features a distinctively ribbed shell, with smooth, rounded whorls. The shell has nodules or bumps on its surface, a unique feature of this species. These nodule-like features provide a distinctive texture, making the fossil easy to identify. The ammonite has a tight coiling pattern with a evolute shape, gradually expanding as it matures. The shell exhibits clear suture lines, offering valuable insight into its evolutionary structure.

Notable Details:

• This fossil is 100% GENUINE and comes with a Certificate of Authenticity, ensuring its authenticity and historical significance.
• The specimen has been carefully selected for its high-quality preservation. The photograph provided shows the actual specimen you will receive, ensuring transparency in your purchase.
• Scale Rule: The scale rule squares/cube shown in the photo represents 1cm, allowing you to accurately gauge the size of the fossil. Full sizing details are available in the photograph.

Condition:

This Amaltheus subnodosus Fossil Ammonite is in excellent condition, showcasing its distinctive ribbing, nodular features, and well-preserved suture lines. The fossil has been cleaned and treated for display, making it an ideal addition to any Jurassic ammonite collection or for those interested in the marine life of the Upper Pliensbachian period.