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Size of a few specimens compared to a human. Mapusaurus was a large theropod, but slightly smaller in size than its close relative Giganotosaurus, with the largest specimen measuring around 10.2–12.2 metres (33–40 ft) long and weighing up to 3–6 metric tons (3.3–6.6 short tons).
Scale diagram comparing a human and the longest-known dinosaurs of five major clades An adult male bee hummingbird, the smallest known and the smallest living dinosaur. Size is an important aspect of dinosaur paleontology, of interest to both the general public and professional scientists.
Giganotosaurus (/ ˌ ɡ ɪ ɡ ə ˌ n oʊ t ə ˈ s ɔː r ə s / GIG-ə-NOH-tə-SOR-əs [2]) is a genus of large theropod dinosaur that lived in what is now Argentina, during the early Cenomanian age of the Late Cretaceous period, approximately 99.6 to 95 million years ago.
Rank Common name Scientific name Family Image Average mass (kg) Maximum mass (kg) Average length (m) Maximum length (m) Shoulder height (m) Native range
An estimated weight of T. mexicanus is no less than 295–318 kg (650–701 lb). [158] The biggest known mustelid to ever exist was likely the giant otter, Enhydriodon. It exceeded 3 m (9.8 ft) in length, and would have weighed in at around 200 kg (440 lb), much larger than any other known mustelid, living or extinct.
T. rex may not be the king of dinosaurs after all. An unearthed skull has revealed a close relative of the T. rex that may have been even larger than the previously-crowned apex predator.
Initially, Nanuqsaurus was estimated to have been about 5–6 meters (16–20 ft) long, a metric based on the holotype specimen, putting the animal at about half the length of Tyrannosaurus rex. [5] [6] [7] The length of the same specimen's reconstructed skull, based on the proportions of related animals, was 60–70 cm (24–28 in). [3]
Torvosaurus (/ ˌ t ɔːr v oʊ ˈ s ɔːr ə s /) is a genus of large megalosaurine theropod dinosaur that lived approximately 165 to 148 million years ago during the Callovian to Tithonian ages of the late Middle and Late Jurassic period in what is now Colorado, Portugal, Germany, and possibly England, Spain, Tanzania, and Uruguay.