Rare Fossil Ammonite Kosmoceras kuklicum Jurassic Callovian Heiznach Switzerland COA

Description Rare Jurassic Kosmoceras kuklicum Ammonite from Switzerland This is a genuine Kosmoceras kuklicum ammonite fossil from the Callovian Stage of the Jurassic Period (around 166–163 million years ago). The specimen was discovered in Heiznach, Switzerland, a locality renowned for its well-preserved ammonites and important contributions to Jurassic paleontology. The fossil pictured is the exact one you will receive, shown with a 1 cm scale cube for size reference. As with all our fossils, this piece is guaranteed authentic and is accompanied by a Certificate of Authenticity. Geological Setting During the Callovian Stage of the Jurassic, much of Europe was covered by shallow, tropical seas. These warm marine environments provided the perfect conditions for ammonites to thrive. The marine sediments deposited in the Heiznach region captured and preserved an incredible array of ammonite species, many of which became important stratigraphic markers. Kosmoceras kuklicum is part of the Kosmoceratidae family, a group of ammonites characterised by ornate ribbing, tubercles, and distinctive shell patterns. Fossils from Heiznach are particularly sought after because of their sharp preservation and strong connection to classic Callovian stratigraphy. Scientific Classification Type: Fossil Ammonite Genus: Kosmoceras Species: kuklicum Order: Ammonitida Superfamily: Stephanoceratoidea Family: Kosmoceratidae Age: Callovian Stage, Jurassic (~166–163 million years ago) Locality: Heiznach, Switzerland Morphological Features This Kosmoceras kuklicum specimen demonstrates the distinctive features of the species: Ribbing: Strong, radiating ribs sweep across the shell flanks, many bifurcating into finer ridges. Tubercles: Small but distinct nodes or tubercles are often present at the ventrolateral shoulders, adding texture to the shell. Whorl Structure: Typically moderately evolute, with earlier whorls clearly visible from the side. Venter: The outer edge usually displays a rounded to keeled margin, depending on preservation. Suture Patterns: Intricate, highly lobed sutures add ornamental appeal and provide insight into the ammonite’s internal chamber structure. These morphological traits not only help palaeontologists identify the species but also give collectors an attractive, visually striking fossil. Paleoecology and Scientific Importance Ammonites such as Kosmoceras kuklicum were marine cephalopods, closely related to modern squid and octopuses. Their chambered shells allowed them to regulate buoyancy, making them active swimmers in the open seas. They fed on small fish, crustaceans, and other marine invertebrates. The Kosmoceras genus is particularly valuable in paleontology because of its rapid evolutionary turnover. Species such as K. kuklicum are used as index fossils, enabling scientists to date and correlate rock layers across wide regions of Europe. Heiznach fossils are often associated with finely laminated marine clays, indicating calm, low-energy depositional conditions that allowed even delicate shell details to be preserved. Collector’s Appeal This rare specimen of Kosmoceras kuklicum represents a unique piece of Jurassic history. Its provenance from Heiznach, Switzerland adds significant value, as fossils from this classic European locality are prized among collectors worldwide. The fine ribbing, shell ornamentation, and excellent preservation make it both a scientifically significant and aesthetically appealing ammonite fossil. Such specimens are ideal for: Private fossil collections Educational displays in schools or museums Gifts for fossil enthusiasts or geology lovers Showcasing as natural history décor Key Features Species: Kosmoceras kuklicum Age: Callovian Stage, Jurassic (~166–163 million years old) Location: Heiznach, Switzerland Distinctive Traits: Ribbing, tubercles, and detailed shell morphology Authenticity: Guaranteed genuine with Certificate of Authenticity Exact Specimen: The fossil pictured is the one you will receive This rare Kosmoceras kuklicum ammonite fossil combines historical, scientific, and aesthetic significance, making it an outstanding addition for collectors and enthusiasts of Jurassic paleontology.