Proplanulites Koenigi Ammonite Fossil Callovian Wiltshire UK Genuine COA

Description Genuine Proplanulites koenigi Ammonite Fossil This listing is for a genuine Proplanulites koenigi ammonite fossil from the Kellaways Formation, dating to the Middle Jurassic, Callovian stage, from Water Park, Ashton Keynes, Wiltshire, UK. This fossil is a carefully chosen specimen, and the photo shows the actual ammonite you will receive, making it a strong choice for collectors who want a clearly identified British Jurassic fossil with detailed locality information. Middle Jurassic Age and Callovian Geology This ammonite dates from the Callovian stage of the Middle Jurassic, approximately 166 to 163 million years ago. During this time, much of southern and central Britain was covered by shallow marine seas. These warm Jurassic waters supported a rich variety of marine life, including ammonites, belemnites, bivalves, gastropods, brachiopods, echinoids, crinoids, fish, and marine reptiles. The Callovian is especially important in British palaeontology because it contains diverse ammonite faunas that help geologists divide the rock record into detailed zones and subzones. Ammonites such as Proplanulites are valuable not only as attractive fossils, but also as important biostratigraphic markers used to compare and date sedimentary layers. Kellaways Formation Fossil from Wiltshire The Kellaways Formation is a well-known Middle Jurassic rock unit in England. It includes marine sediments such as sands, silts, clays, and calcareous beds that were deposited in ancient sea-floor environments. These sediments record changing conditions in a shallow marine basin and are known for preserving ammonites and other marine fossils. Water Park, Ashton Keynes, in Wiltshire, lies within a region associated with classic Jurassic fossil-bearing deposits. Fossils from this area are popular with collectors because they represent an important part of Britain’s Jurassic geological history. A specimen with a named formation, stage, and locality has added educational and display value, particularly for collectors who organise fossils by geological age or place of origin. Fossil Type and Species Proplanulites koenigi is an extinct ammonite species. Ammonites were marine cephalopods related to modern squid, octopus, cuttlefish, and nautilus. They lived inside coiled chambered shells, with the living animal occupying the final body chamber while earlier chambers helped regulate buoyancy. The genus Proplanulites is associated with Middle Jurassic ammonite faunas and is known for its coiled shell form, ribbed ornamentation, and classic planispiral ammonite shape. Depending on preservation, specimens may show visible whorls, ribbing across the flanks, a defined outer margin, and natural shell detail. These features make Proplanulites ammonites appealing to collectors of named Jurassic cephalopods. Scientific Classification and Collector Interest Proplanulites belongs to the ammonite order Ammonitida, a highly successful group of extinct marine cephalopods that became especially diverse during the Jurassic Period. Ammonites evolved rapidly and spread widely through ancient seas, which is why their shells are so useful for geological dating and correlation. The species name koenigi is connected with historic ammonite naming traditions and is associated with classic Jurassic faunas. Named ammonite species are especially desirable for collectors because they provide a more precise scientific identity than a general ammonite listing. This makes the fossil suitable for study collections, teaching sets, and specialist fossil displays. Morphology and Natural Features Proplanulites ammonites typically show a compact coiled shell with ribbing that reflects the growth pattern of the original animal. The ribs, whorl shape, and shell proportions are key features used in ammonite identification. Natural variations in preservation, surface texture, matrix, colour, and shell detail are expected in genuine Jurassic fossils and add to the individual character of the specimen. This fossil is ideal for collectors of British fossils, Wiltshire fossils, Jurassic ammonites, Kellaways Formation fossils, Callovian fossils, and fossil cephalopods. Its combination of age, locality, formation, and species identification gives it strong appeal as both a display piece and an educational specimen. Display and Authenticity This Proplanulites koenigi ammonite fossil would display well in a fossil cabinet, natural history collection, study tray, classroom resource, museum-style display, or geology collection. Full sizing can be seen in the photo, so please refer to the image for exact scale and dimensions. This fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card. The photograph shows the actual Proplanulites koenigi ammonite you will receive, allowing you to view the fossil’s condition, shape, detail, and natural preservation before ordering.