{"product_id":"spinosaurus-dinosaur-tooth-med-case-3","title":"Spinosaurus Dinosaur Tooth Med Case","description":"\u003cp\u003eA good-quality Spinosaurus tooth housed in a display box measuring 6.25” x 5.25”.\u003c\/p\u003e\n\u003cp\u003eTeeth range between 2\"-2.75\"\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe item shown in the picture will be provided to you.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eI go through thousands of spinosaur teeth each year and \u003cstrong\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003eit’s rare to come across a perfect, unbroken tooth.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eI’ve picked out some of the better ones. \u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eThat being said they might have repair and all will have a coating of glue that was applied in the field\u003c\/strong\u003e\u003c\/span\u003e. I’ve taken good images of them so you can see what I can’t with the naked eye. \u003cbr\u003e\u003cbr\u003eBest bang for your buck when it comes to buying a theropod dinosaur tooth…the largest carnivorous dinosaur that ever existed.\u003c\/p\u003e\n\u003c!--split--\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Spinosaurus\"\u003eSpinosaurus\u003c\/a\u003e is one of the strangest and most debated dinosaurs ever discovered. This huge predator lived in what is now \u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1995822625000561\"\u003eNorth Africa\u003c\/a\u003e during the Late Cretaceous, roughly 100–94 million years ago, in river systems and coastal wetlands that teemed with giant fish, crocodile-like reptiles, and \u003ca href=\"https:\/\/pubs.geoscienceworld.org\/gsa\/geology\/article-abstract\/37\/9\/843\/30048\/A-surfeit-of-theropods-in-the-Moroccan-Late?\"\u003eother dinosaurs\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eWith its long, crocodile-like snout, tall back “sail,” and likely semi-aquatic lifestyle, Spinosaurus doesn’t \u003ca href=\"https:\/\/paulsereno.uchicago.edu\/discoveries\/spinosaurus_aegyptiacus\/\"\u003elook\u003c\/a\u003e or behave like the classic land-stalking meat-eaters most people imagine. It’s a dinosaur that has forced paleontologists to rethink what large theropods could do.\u003c\/p\u003e\n\u003ch3\u003eDiscovery and the lost type specimen\u003c\/h3\u003e\n\u003cp\u003eSpinosaurus was first discovered in Egypt in 1912 and \u003ca href=\"https:\/\/carnegiemnh.org\/the-strange-saga-of-spinosaurus-the-semiaquatic-dinosaurian-superpredator\/\"\u003edescribed\u003c\/a\u003e by German paleontologist \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Ernst_Stromer\"\u003eErnst Stromer\u003c\/a\u003e in 1915. The original fossils came from the\u003ca href=\"https:\/\/www.wuestenschiff.de\/dateien\/bahariya.pdf\"\u003e Bahariya Formation\u003c\/a\u003e and included parts of the skull, vertebrae, ribs, and those famous tall neural spines that inspired the name “spine lizard.”\u003c\/p\u003e\n\u003cp\u003eTragically, Stromer’s original specimen – the holotype – was destroyed during World War II when the \u003ca href=\"https:\/\/news.artnet.com\/art-world\/bomb-evacuation-munich-museum-338217\"\u003eMunich museum\u003c\/a\u003e housing it was hit in an air raid in 1944.\u003c\/p\u003e\n\u003cp\u003eThat loss was enormous for science. For decades, all we had were Stromer’s notes, drawings, and a handful of photos. Critical information vanished with the bones: exact proportions, fine details of the spine and skull, and subtle anatomical features that help separate species. Because the type specimen is gone, later fossils from \u003ca href=\"https:\/\/www.britannica.com\/place\/Morocco\"\u003eMorocco\u003c\/a\u003e and elsewhere have had to be compared to old documentation instead of the actual bones. This is a big reason why there’s still debate over how many Spinosaurus species there were, how it was built, and even exactly how big it got.\u003c\/p\u003e\n\u003ch3\u003eSize and where it lived\u003c\/h3\u003e\n\u003cp\u003eSpinosaurus lived in north African river and delta systems – especially in what’s now Morocco, Egypt, Algeria, and Tunisia – with famous finds from the \u003ca href=\"https:\/\/www.smithsonianmag.com\/science-nature\/the-kem-kem-beds-a-paradise-for-predators-89707410\/\"\u003eKem Kem Beds\u003c\/a\u003e and the Bahariya Formation. These rocks record a humid, low-lying landscape of rivers, floodplains, and coastal lagoons near the shores of the ancient \u003ca href=\"https:\/\/www.britannica.com\/place\/Tethys-Sea\"\u003eTethys Sea\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eMost modern estimates put Spinosaurus at about 14–18 meters (46–59 feet) long, making it a strong contender for the longest known theropod dinosaur, rivaling or exceeding Tyrannosaurus rex in length (though probably not in overall bulk). Its weight is debated, but many estimates land in the\u003ca href=\"https:\/\/www.amnh.org\/exhibitions\/dinosaurs-ancient-fossils\/theropod-biomechanics\/the-problem-of-size\"\u003e 7–8+ ton range\u003c\/a\u003e for the biggest individuals. However you slice it, we’re talking about a massive predator – long, low, and imposing, with a huge sail rising from its back.\u003c\/p\u003e\n\u003ch3\u003eHow Spinosaurus differed from other big predators\u003c\/h3\u003e\n\u003cp\u003eSpinosaurus didn’t look or live like a typical big meat-eater such as T. rex:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCrocodile-like skull – Long, narrow snout with conical teeth ideal for gripping slippery prey, more like a huge gharial than a bone-crushing tyrannosaur.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBack sail – Very tall neural spines on the vertebrae formed a sail or ridge, possibly used for display, thermoregulation, or species recognition.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eShorter hind limbs – Newer fossils suggest shorter, more squat back legs than other giant theropods.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDeep, paddle-like tail – Recent discoveries show a tall, fin-shaped tail that could have helped in swimming.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePut together, Spinosaurus seems built less like a sprinting land hunter and more like a semi-aquatic ambush predator, comfortable in the water and at the water’s edge.\u003c\/p\u003e\n\u003ch3\u003eLifestyle – a semi-aquatic specialist\u003c\/h3\u003e\n\u003cp\u003eSpinosaurus probably spent much of its life around rivers and wetlands, hunting large fish and \u003ca href=\"https:\/\/zookeys.pensoft.net\/article\/47517\/\"\u003eother aquatic prey\u003c\/a\u003e. Evidence for this lifestyle includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eConical, mostly non-serrated teeth ideal for gripping fish, not sawing through bone like T. rex.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBone structure that appears denser than many other theropods, which may have helped with buoyancy control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe tall, fin-like tail that would provide propulsion in water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAn unusually high abundance of Spinosaurus teeth in river deposits, suggesting the animal spent a lot of time in those aquatic settings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot everyone agrees it was a fully aquatic dinosaur – some researchers see it more as a wading shoreline predator – but the overall picture is clear: Spinosaurus was tightly tied to water, filling a crocodile-plus niche that no other giant theropod seems to have occupied.\u003c\/p\u003e\n\u003ch3\u003eWhy Spinosaurus teeth are so common and affordable\u003c\/h3\u003e\n\u003cp\u003eIf Spinosaurus is such an impressive dinosaur, why are its teeth relatively common and affordable compared to something like T. rex? A few key reasons:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhere it lived\u003c\/strong\u003e\u003cbr\u003eMost collectible Spinosaurus teeth come from the Kem Kem Beds of Morocco, a stack of river and delta deposits that are excellent at concentrating and preserving hard parts like teeth. Those same conditions that made great fish and crocodile fossils also produced a lot of Spinosaurus teeth.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAquatic lifestyle\u003c\/strong\u003e\u003cbr\u003eSpending so much time in and around water meant every shed tooth had a good chance of dropping straight into a depositional environment where it could be quickly buried and preserved. Over millions of years, that adds up.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTooth replacement\u003c\/strong\u003e\u003cbr\u003eLike other theropods, Spinosaurus continually replaced its teeth. A large, fish-hunting predator working river channels daily would lose a huge number of teeth over its lifetime – each one a potential fossil.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGeology and access\u003c\/strong\u003e\u003cbr\u003eThe Kem Kem Beds are actively worked by local collectors and miners, who find and sell large numbers of teeth into the global market. In contrast, T. rex comes from more limited formations in North America with stricter land access and fewer commercial quarries.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003ePut all that together and you get a dinosaur that’s gigantic and famous, but whose teeth still enter the market in enough volume to keep prices relatively accessible. For many collectors, a Spinosaurus tooth is their first “big theropod” fossil.\u003c\/p\u003e\n\u003ch3\u003eHow it compares to T. rex and Carcharodontosaurus\u003c\/h3\u003e\n\u003cp\u003eSpinosaurus is often compared with two other giant theropods: \u003cstrong\u003eTyrannosaurus rex\u003c\/strong\u003e and \u003cstrong\u003eCarcharodontosaurus\u003c\/strong\u003e(another huge predator from Africa and South America). All three were apex carnivores, but they were built – and lived – very differently.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth shape and feeding style\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/palaeo-electronica.org\/content\/2020\/3170-histology-of-spinosaurid-teeth\"\u003e\u003cem\u003eSpinosaurus\u003c\/em\u003e\u003c\/a\u003e: long, conical, lightly textured teeth with little or no serration; designed to grip slippery prey like fish and smaller aquatic animals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.researchgate.net\/figure\/Tyrannosaurus-rex-dental-functional-morphology-A-Exemplar-tooth-pressures-along-the_fig3_317028057\"\u003e\u003cem\u003eT. rex\u003c\/em\u003e\u003c\/a\u003e: thick, banana-shaped, heavily serrated “bone crusher” teeth built to punch through flesh and bone, delivering devastating bites to large land animals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.researchgate.net\/figure\/Teeth-from-Morocco-and-Niger-referred-to-Carcharodontosaurus-Teeth-of-UCRC-PV12-C_fig131_340819682\"\u003e\u003cem\u003eCarcharodontosaurus\u003c\/em\u003e\u003c\/a\u003e: long, laterally compressed, strongly serrated teeth more like enormous steak knives, specialized for slicing through meat rather than crushing bone.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHabitat and hunting\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cem\u003eSpinosaurus\u003c\/em\u003e: strongly associated with rivers and wetlands; likely spent much of its time in or near the water, ambushing fish and other aquatic prey.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cem\u003eT. rex\u003c\/em\u003e: a primarily terrestrial predator and scavenger of upland and floodplain environments in North America, targeting large dinosaurs like hadrosaurs and ceratopsians.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cem\u003eCarcharodontosaurus\u003c\/em\u003e: a land-based predator in African ecosystems, probably hunting large herbivorous dinosaurs such as sauropods and iguanodonts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCollecting and availability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eT. rex teeth are extremely rare, tightly controlled by locality and land regulations, and carry very high prices.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCarcharodontosaurus teeth are more available than T. rex but still significantly scarcer and more expensive than Spinosaurus teeth.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpinosaurus teeth, especially from the Kem Kem Beds, are abundant enough that collectors can often afford a large, impressive tooth for a fraction of what a comparable T. rex or Carcharodontosaurus tooth would cost.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSo while all three were giant predators at the top of their food webs, Spinosaurus stands out as the \u003cstrong\u003eaquatic specialist\u003c\/strong\u003e, with teeth, jaws, and a body plan built for a very different kind of hunting.\u003c\/p\u003e\n\u003ch3\u003eThe sail – what was it for?\u003c\/h3\u003e\n\u003cp\u003eThat huge sail on Spinosaurus’ back is one of its most eye-catching features, and scientists still debate its function. Possibilities include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDisplay and species recognition – a giant visual billboard for attracting mates, intimidating rivals, or signaling to other Spinosaurus.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThermoregulation – a heat-exchange surface helping warm up or cool down the body, though this is still debated.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStability or maneuvering in water – a possible aid in balance and side-to-side stability while swimming or wading.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhatever its exact purpose, the sail makes Spinosaurus instantly recognizable and adds to its appeal in both science and collecting.\u003c\/p\u003e\n\u003ch3\u003eA constantly changing dinosaur\u003c\/h3\u003e\n\u003cp\u003eOne of the most interesting things about Spinosaurus is how fast our picture of it has changed.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eEarly reconstructions showed a fairly typical big theropod with a sail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLater versions gave it a more classic “T. rex-like” stance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRecent discoveries – especially the shorter legs and paddle-like tail – now suggest a long-bodied, semi-aquatic animal very different from what most people grew up seeing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor collectors and dinosaur fans, that means owning a Spinosaurus tooth is owning a piece of a story that’s still unfolding. As new fossils come out of North Africa and new studies are published, our understanding of this bizarre predator continues to evolve.\u003c\/p\u003e\n\u003ch3\u003eWhy people love collecting Spinosaurus\u003c\/h3\u003e\n\u003cp\u003eSpinosaurus hits a sweet spot for collectors:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eIt’s one of the largest carnivorous dinosaurs ever discovered.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIt has a wild, unique look – sail, crocodile snout, semi-aquatic lifestyle.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIts teeth are common enough and affordable enough that many people can actually own a piece of it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNew discoveries keep it in the spotlight, so it’s a dinosaur that feels “alive” in current research, not just a static museum classic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhether it’s a single tooth from the Kem Kem Beds or a larger piece of bone, a Spinosaurus fossil connects you directly to a giant, sail-backed predator that prowled Cretaceous rivers long before the first T. rex ever walked the Earth.\u003c\/p\u003e","brand":"Fossils Online","offers":[{"title":"M8","offer_id":52170480844940,"sku":null,"price":89.0,"currency_code":"USD","in_stock":true},{"title":"M9","offer_id":52170480877708,"sku":null,"price":89.0,"currency_code":"USD","in_stock":true},{"title":"M10","offer_id":52170480910476,"sku":null,"price":99.0,"currency_code":"USD","in_stock":true},{"title":"M11","offer_id":52170480943244,"sku":null,"price":89.0,"currency_code":"USD","in_stock":true},{"title":"M12","offer_id":52170480976012,"sku":null,"price":89.0,"currency_code":"USD","in_stock":true},{"title":"M13","offer_id":52170481008780,"sku":null,"price":89.0,"currency_code":"USD","in_stock":true},{"title":"M14","offer_id":52170481041548,"sku":null,"price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0621\/3697\/5500\/files\/Untitled-23_456b22c4-b3c2-4ed3-bf8a-98fb04ef5e7f.jpg?v=1786480302","url":"https:\/\/fossilsonline.com\/products\/spinosaurus-dinosaur-tooth-med-case-3","provider":"Fossils Online","version":"1.0","type":"link"}