Rare Hemitetagonites crebiscutatum Fossil Ammonite – Albian, Cretaceous, Madagascar – Genuine CO

Description A rare and scientifically important Hemitetagonites crebiscutatum Fossil Ammonite, from the Albian Stage of the Cretaceous Period, collected in Madagascar. This unusual ammonite represents a distinctive genus with striking ribbing patterns, making it a superb specimen for collectors of rare Cretaceous fossils. The exact specimen shown in the photographs is the one you will receive, and it comes with a Certificate of Authenticity. Fossil Type & Species: Type: Ammonite (extinct marine cephalopod) Species: Hemitetagonites crebiscutatum Order: Ammonitida Superfamily: Acanthoceratoidea Family: Brancoceratidae Geological Context: Period: Cretaceous Epoch/Stage: Lower Cretaceous – Albian (approx. 113 to 100.5 million years ago) Biozone: Often associated with mid- to late-Albian ammonite assemblages used for zonal correlation Depositional Environment: Shallow epicontinental seas with fine calcareous sediments, favourable for ammonite fossilisation Locality: Region: Madagascar (exact formation not specified, but part of Madagascar’s well-known Albian marine fossil deposits) Morphology & Features: Moderately evolute shell with a wide umbilicus Strong ribbing, often crowded and branching, extending continuously across the venter Robust, discoidal whorls with well-marked ornamentation Distinctive high rib density gives the species its recognisable appearance Scientific Notes: Hemitetagonites crebiscutatum was first described by Stoliczka (1863) during his pioneering work on Cretaceous ammonites of southern Asia, later identified in Madagascar deposits It is considered a key ammonite species for correlation within the Albian stage across the Tethyan realm Notable Details: Excellent preservation of ribbing and overall shell form Completely natural, unrestored specimen Scale Reference: Each square or cube in the photo = 1cm. Please see images for accurate fossil dimensions Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and professionally curated. A Certificate of Authenticity is included with your purchase. The fossil shown is the exact specimen you will receive.   This Hemitetagonites crebiscutatum ammonite is a rare and scientifically valuable fossil from Madagascar, making it a perfect addition to advanced collections or natural history displays.