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Tyrannosaurus (/ t ɪ ˌ r æ n ə ˈ s ɔː r ə s, t aɪ-/) [a] is a genus of large theropod dinosaur.The type species Tyrannosaurus rex (rex meaning 'king' in Latin), often shortened to T. rex or colloquially T-Rex, is one of the best represented theropods.
Skeletal mount of the Tyrannosaurus holotype.. This timeline of tyrannosaur research is a chronological listing of events in the history of paleontology focused on the tyrannosaurs, a group of predatory theropod dinosaurs that began as small, long-armed bird-like creatures with elaborate cranial ornamentation but achieved apex predator status during the Late Cretaceous as their arms shrank and ...
This sudden change in growth rate may indicate physical maturity, a hypothesis that is supported by the discovery of medullary tissue in the femur of an 18-year-old T. rex from Montana (MOR 1125, also known as "B-rex"). [51] Medullary tissue is found only in female birds during ovulation, indicating that "B-rex" was of reproductive age. [52]
The upcoming film, titled “T. Rex” — set to debut on June 21 — captures the young archaeologists’ unexpected journey, which began as an ordinary hike in the Hell Creek formation of their ...
An adult T. rex was on average 40 feet long and weighed at least 8,000 pounds, according to Lyson. The skeleton is about 30% complete, but Lyson said the bones are in good condition.
T. rex was fully grown at around 18-21 years. Perhaps the largest-known Tyrannosaurus, a specimen named Sue at the Field Museum in Chicago, is 40-1/2 feet (12.3 meters) long.
Tyrannosauroidea (meaning 'tyrant lizard forms') is a superfamily (or clade) of coelurosaurian theropod dinosaurs that includes the family Tyrannosauridae as well as more basal relatives.
At the time of its discovery, the fossil was one of only 12 known T. rex skeletons of significant completion. [3] The name "Scotty" came from the celebratory bottle of scotch shared by the team that had discovered and identified the bones. [11] Alongside the fossil was also found the only known T. rex coprolite in the world. [12]