RARE 4.5″ ASTEROCERAS STELLARE Ammonite Fossil Lower Jurassic Frodingham Ironstone Scunthorpe UK Authentic Specimen

Description This listing features a RARE 4.5″ ammonite fossil of Asteroceras stellare, found in the Frodingham Ironstone Formation at Conesby Quarry, near Scunthorpe, North Lincolnshire, England. This beautifully preserved specimen is from the Lower Lias Group, specifically the Denotatus Subzone of the Obtusum Zone, Lower Sinemurian Stage, and comes with a Certificate of Authenticity. Asteroceras stellare is a classic species from the early Jurassic and belongs to: Order: Ammonitida Superfamily: Psilocerataceae Family: Arietitidae This ammonite is a key component of the early Sinemurian marine fauna and is used biostratigraphically to correlate Lower Jurassic strata across Europe. The Frodingham Ironstone Formation was deposited in a shallow marine, iron-rich sedimentary environment, dating to approximately 199–197 million years ago. Morphological Features: Large, evolute shell with widely spaced whorls Coarse radial ribbing extending across the venter Broad umbilicus with strong, well-defined ornamentation Suture lines with distinct lobes and saddles These features not only make Asteroceras stellare highly recognisable, but also highly desirable for collectors and researchers alike due to its preservation, rarity, and size. Specimen Details: Species: Asteroceras stellare Fossil Type: Ammonite Shell Size: 4.5 inches (11.5 cm approx.) Geological Formation: Frodingham Ironstone Formation Biozone/Subzone: Obtusum Zone / Denotatus Subzone Geological Stage: Lower Sinemurian, Lower Jurassic Location: Conesby Quarry, Scunthorpe, North Lincolnshire, England Depositional Environment: Shallow marine, iron-rich platform Family: Arietitidae This is a rare opportunity to own a museum-grade specimen of a 4.5″ ammonite from a classic Lower Jurassic British locality. Ideal for display, study, or as a centrepiece in any fossil collection. Scale rule squares/cube = 1cm. Please refer to the photo for accurate size and detail. All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.