RARE Triassic Ammonite Fossil – JUVENITES SEPTENTRIONALIS – Thaynes Limestone – Lower Triassic – Elko County, Nevada, USA

Description This listing features a RARE and scientifically valuable Triassic ammonite fossil of the species Juvenites septentrionalis, found in the iconic Thaynes Limestone Formation of Elko County, Northeastern Nevada, USA. An extraordinary example of marine life that emerged after the Permian-Triassic extinction event. Fossil Type & Species: Type: Fossilised Ammonite (extinct marine cephalopod) Species: Juvenites septentrionalis Geological Context: Era: Mesozoic Period: Triassic Stage: Lower Triassic (Spathian) Formation: Thaynes Limestone Locality: Elko County, Nevada, USA Depositional Environment: Shallow marine carbonate shelf; part of an epicontinental sea rich in early Mesozoic marine fauna Morphological Features: Small to medium-sized planispiral shell Fine ribbing across the whorls and a gently rounded venter Ceratitic suture patterns, typical of Triassic ammonoids Scientific Notes: Juvenites septentrionalis is a key representative of post-extinction recovery fauna and provides critical data for understanding ammonoid evolution during the Early Triassic. The Thaynes Limestone is a world-renowned formation for Lower Triassic ammonoids and is crucial for biostratigraphic zonation. Taxonomy: Order: Ceratitida Superfamily: Meekoceratoidea Family: Juvenitidae Formally Described By: Known from systematic Triassic ammonoid works in North American paleontology Authenticity & Display: All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. The fossil shown in the photograph is the exact piece you will receive. Please refer to the image for exact sizing – Scale cube = 1cm. This is a striking and informative specimen ideal for collectors focused on Triassic faunas, ammonoid evolution, or rare North American fossil finds.