{"product_id":"deinocheirus-mirificus-1","title":"Deinocheirus mirificus","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a5dbd41-4b78-83eb-bdb1-9c8884dec0d4-6\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a5dbd41-4b78-83eb-bdb1-9c8884dec0d4-6\" data-turn-id-container=\"request-6a5dbd41-4b78-83eb-bdb1-9c8884dec0d4-6\" data-testid=\"conversation-turn-16\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-8 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"013677df-c4d5-4f18-a33b-08da21fa9fa5\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-6-thinking\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"LR5Y_W_content markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp dir=\"auto\" data-start=\"0\" data-end=\"583\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cem data-start=\"0\" data-end=\"28\"\u003e\u003cstrong data-start=\"1\" data-end=\"27\"\u003eDeinocheirus mirificus\u003c\/strong\u003e\u003c\/em\u003e was a gigantic ornithomimosaurian theropod dinosaur from the Late Cretaceous of Mongolia, known primarily from fossil remains recovered from the Nemegt Formation in the Gobi Desert. It lived during the early Maastrichtian, approximately \u003cstrong data-start=\"266\" data-end=\"290\"\u003e70 million years ago\u003c\/strong\u003e, in fluvial and humid ecosystems very different from the arid landscapes that characterise the region today. Its name means “terrible hand”, referring to the enormous arms and claws first discovered in 1965, which for decades represented almost everything known about this enigmatic dinosaur.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"585\" data-end=\"1137\"\u003eFor many years, \u003cem data-start=\"601\" data-end=\"625\"\u003eDeinocheirus mirificus\u003c\/em\u003e was one of the great mysteries of dinosaur palaeontology. The holotype preserved mainly the forelimbs, shoulder girdle and some vertebral elements, but lacked the skull and much of the rest of the skeleton. This led to numerous interpretations regarding its appearance and lifestyle. The discovery and description of much more complete skeletons, published in 2014, completely transformed its reconstruction and revealed an animal very different from the gracile, cursorial ornithomimosaurs traditionally known.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"1139\" data-end=\"1634\"\u003eTaxonomically, \u003cem data-start=\"1154\" data-end=\"1178\"\u003eDeinocheirus mirificus\u003c\/em\u003e belongs to Deinocheiridae, a lineage of basal or specialised ornithomimosaurs characterised by large body size, long forelimbs and a more robust anatomy than forms such as \u003cem data-start=\"1351\" data-end=\"1363\"\u003eGallimimus\u003c\/em\u003e or \u003cem data-start=\"1367\" data-end=\"1381\"\u003eOrnithomimus\u003c\/em\u003e. Although it belonged to the group commonly referred to as “ostrich dinosaurs”, \u003cem data-start=\"1462\" data-end=\"1476\"\u003eDeinocheirus\u003c\/em\u003e was not a lightweight runner, but a huge, heavy-bodied animal specialised for a much slower lifestyle, probably closely associated with fluvial environments.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"1636\" data-end=\"2185\"\u003eFrom a morphometric perspective, \u003cem data-start=\"1669\" data-end=\"1693\"\u003eDeinocheirus mirificus\u003c\/em\u003e was one of the largest ornithomimosaurs known. Modern estimates place large adults at around \u003cstrong data-start=\"1787\" data-end=\"1818\"\u003e10–11 metres in body length\u003c\/strong\u003e, with an approximate mass of \u003cstrong data-start=\"1848\" data-end=\"1877\"\u003e6 tonnes or slightly more\u003c\/strong\u003e in particularly large individuals. Hip height may have exceeded \u003cstrong data-start=\"1942\" data-end=\"1954\"\u003e3 metres\u003c\/strong\u003e. The body was very bulky, with a deep torso, robust pelvis, powerful hind limbs and a relatively long tail. Overall, it had a massive silhouette that differed considerably from the lighter build of more cursorial ornithomimosaurs.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"2187\" data-end=\"2749\"\u003eOne of the most distinctive features of \u003cem data-start=\"2227\" data-end=\"2241\"\u003eDeinocheirus\u003c\/em\u003e was the large hump or elevated dorsal profile formed by extremely elongated neural spines on the dorsal and sacral vertebrae. These spines created a high silhouette over the torso and may have supported ligaments, musculature, fat deposits or structures used for visual display. There is no direct evidence for a thin “sail” comparable to that of \u003cem data-start=\"2589\" data-end=\"2602\"\u003eSpinosaurus\u003c\/em\u003e, so a scientifically rigorous reconstruction should interpret this feature as a thick, muscular dorsal structure integrated into the body outline.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"2751\" data-end=\"3273\"\u003eThe forelimbs were extraordinarily long. The arms could exceed \u003cstrong data-start=\"2814\" data-end=\"2826\"\u003e2 metres\u003c\/strong\u003e in length and ended in large hands with three fingers and robust, though not especially sharp, claws. These limbs may have been used to pull branches closer, manipulate vegetation, dig, defend the animal or stabilise the body during certain activities. The shape of the claws suggests that they were not primarily adapted for capturing large prey, but rather for more generalised functions related to feeding and interaction with the environment.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"3275\" data-end=\"3867\"\u003eThe skull of \u003cem data-start=\"3288\" data-end=\"3312\"\u003eDeinocheirus mirificus\u003c\/em\u003e was surprisingly elongated and low, with a broad, flattened snout superficially reminiscent of that of a hadrosaurid. It lacked teeth and possessed an anterior keratinous beak, while the lower jaw was deep and may have supported an extensive soft-tissue structure. The shape of the snout suggests a diet capable of incorporating both aquatic and terrestrial vegetation, while the presence of more than a thousand gastroliths in the abdominal region of one specimen indicates that swallowed stones were used to help grind food within the digestive system.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"3869\" data-end=\"4393\"\u003eThe diet of \u003cem data-start=\"3881\" data-end=\"3895\"\u003eDeinocheirus\u003c\/em\u003e appears to have been omnivorous. Fish remains were discovered in the abdominal region together with the gastroliths, providing direct evidence for the consumption of aquatic vertebrates. However, its broad beak, lack of teeth and abundant gastroliths indicate that plant material must also have formed a substantial part of its diet. It probably consumed plants, fruits, seeds, aquatic vegetation, small animals and fish, functioning as a large opportunistic omnivore within the Nemegt ecosystems.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"4395\" data-end=\"4934\"\u003eThe hind limbs also show interesting adaptations. Although robust, the feet were relatively broad and the ungual phalanges were flattened, features interpreted as useful for moving over soft, muddy ground or areas close to waterways. This anatomy fits well with the palaeoenvironment of the Nemegt Formation, which was characterised by large rivers, floodplains, lakes and abundant vegetation. \u003cem data-start=\"4789\" data-end=\"4803\"\u003eDeinocheirus\u003c\/em\u003e probably spent a considerable amount of time in these humid environments, where it could exploit both plant and aquatic resources.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"4936\" data-end=\"5607\"\u003eThe tail ended in vertebrae bearing structures reminiscent of a pygostyle, an extremely unusual feature in a theropod of this size. This region may have supported a fan of feathers or other integumentary structures used for display. As an ornithomimosaur, it is plausible that \u003cem data-start=\"5213\" data-end=\"5227\"\u003eDeinocheirus\u003c\/em\u003e possessed some degree of feather covering, particularly in juveniles or on certain parts of the body, although the precise extent of plumage in giant adults remains uncertain. A scientifically cautious reconstruction may therefore depict a combination of scaly skin and regions with filamentous plumage without assuming a complete feather covering that has not been demonstrated.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"5609\" data-end=\"6150\"\u003e\u003cem data-start=\"5609\" data-end=\"5633\"\u003eDeinocheirus mirificus\u003c\/em\u003e inhabited one of the richest dinosaur ecosystems of the Late Cretaceous in Asia. In the Nemegt Formation, it coexisted with hadrosaurids such as \u003cem data-start=\"5779\" data-end=\"5792\"\u003eSaurolophus\u003c\/em\u003e, sauropods such as \u003cem data-start=\"5812\" data-end=\"5827\"\u003eNemegtosaurus\u003c\/em\u003e, large theropods such as \u003cem data-start=\"5853\" data-end=\"5866\"\u003eTarbosaurus\u003c\/em\u003e, ornithomimosaurs such as \u003cem data-start=\"5893\" data-end=\"5905\"\u003eGallimimus\u003c\/em\u003e, therizinosaurs, oviraptorosaurs, ankylosaurs and numerous aquatic vertebrates. Within this community, \u003cem data-start=\"6009\" data-end=\"6023\"\u003eDeinocheirus\u003c\/em\u003e occupied a highly distinctive niche as a gigantic omnivorous theropod strongly associated with humid and fluvial environments.\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"6152\" data-end=\"6186\"\u003e\u003cstrong data-start=\"6152\" data-end=\"6186\"\u003eApproximate Replica Dimensions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\" data-start=\"6188\" data-end=\"6235\" data-is-last-node=\"\" data-is-only-node=\"\" class=\"\"\u003e\u003cstrong data-start=\"6188\" data-end=\"6199\"\u003eMedium:\u003c\/strong\u003e 80 mm high\u003cbr data-start=\"6210\" data-end=\"6213\"\u003e\u003cstrong data-start=\"6213\" data-end=\"6223\"\u003eLarge:\u003c\/strong\u003e 134 mm high\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Dino and Dog","offers":[{"title":"Mediana \/ Sin imprimar","offer_id":62088481603852,"sku":"DC-1577-MEDIA-SINI","price":27.6,"currency_code":"EUR","in_stock":true},{"title":"Mediana \/ Imprimado","offer_id":62088481636620,"sku":"DC-1577-MEDIA-IMPRI","price":30.6,"currency_code":"EUR","in_stock":true},{"title":"Mediana \/ Pintado a mano","offer_id":62088481669388,"sku":"DC-1577-MEDIA-PINTA","price":99.5,"currency_code":"EUR","in_stock":true},{"title":"Grande \/ Sin imprimar","offer_id":62088481702156,"sku":"DC-1577-GRAND-SINI","price":42.0,"currency_code":"EUR","in_stock":true},{"title":"Grande \/ Imprimado","offer_id":62088481734924,"sku":"DC-1577-GRAND-IMPRI","price":49.0,"currency_code":"EUR","in_stock":true},{"title":"Grande \/ Pintado a mano","offer_id":62088481767692,"sku":"DC-1577-GRAND-PINTA","price":149.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/1106\/7660\/files\/3_add58c17-0074-43dc-8b48-072d0ba6d831.jpg?v=1789648505","url":"https:\/\/dinosauriacreatures.com\/en\/products\/deinocheirus-mirificus-1","provider":"Dinosauria Creatures","version":"1.0","type":"link"}