Autumn and Winter Check-in Challenge Tyrannosaurus rex is a type of dinosaur, also known as Rex Tyrannosaurus, the largest one in the tyrannosaur family, one of the largest land carnivorous animals in history, the most famous carnivorous dinosaur, and one of the latest dinosaurs, living at the end of the Cretaceous period in the Maastricht stage of about 68.5 million years ago to the end of the Cretaceous period, let's take a look at the information of the Tyrannosaurus rex!
1. Morphological characteristics of Tyrannosaurus rex.
Tyrannosaurus rex is 11 years long5～14.6 meters (maximum length of the bend is 15.)3 meters), average hip height 43 meters, maximum buttocks 52 meters, up to 6 meters (from the ground to the head), with an average weight of 8 tons and a maximum weight of 1486 tons, head length 12～1.55 meters, the bite force has ever ranked first in land creatures, up to about 120,000 Newtons, like other tyrannosaurus family has a very small forelimbs, the length is only 22% of the hind limbs, the length of the average individual is only about 80 centimeters, compared to the huge size and hind limbs of the Tyrannosaurus rex, the forelimbs appear very small.
2. The hermaphroditic heteromorphism of Tyrannosaurus rex.
Tyrannosaurus rex can be divided into two patterns or morphologies, similar to some other theropod dinosaurs, one of which is more stout and the other is more slender, several morphological studies suggest that these two forms represent the Tyrannosaurus rex with hermaphroditism, and the thicker form is usually considered to be female, for example, several stout specimens appear to have a wide pelvis that may have been used to accommodate the passage for laying eggs, and the herringbone on the first caudal vertebra of the stout form is reduced, which is obviously used to accommodate the birth canal of the reproductive system, a feature that is also present in crocodiles。
3. The habitat of Tyrannosaurus rex.
Tyrannosaurus rex conifers and their relatives are still found in the vicinity of the site of the Tyrannosaurus rex, and the scene at that time was similar to that of Florida or southern Georgia, with some small trees, about 15 to 25 meters high, with trunks less than 0 meters in diameter3 meters, in the era of Tyrannosaurus rex, modern plants of various families have appeared, and the species of dinosaurs are less than Jurassic, so the environment in which Tyrannosaurus rex lives is not as peculiar as imagined. The flowering plants that appeared in the early Cretaceous period dominated the world's ecosystems during the period of Tyrannosaurus rex's life, and 90% of the leaf fossils were found in North Dakota, and 90% of the more than 30,000 leaf fossils collected belonged to broadleaf plants.
Fourth, the growth life of Tyrannosaurus rex.
New research data suggests that the average lifespan of a Tyrannosaurus rex was only 16At 6666 years old, that is, few Tyrannosaurus rex can enjoy the "good time" of sexual maturity to the fullest, and the largest and longest-lived Tyrannosaurus rex "Sue" discovered so far only lived to be 28 years old. According to the New York Times, Erickson, a paleontologist at Florida State University in the United States, found in his study of Tyrannosaurus rex fossils that Tyrannosaurus rex has a rapid growth period in the development stage, during which the growth rate is quite high, and it can grow almost 4 pounds of meat per day.
5. Species evolution of Tyrannosaurus rex.
The earliest ancestors of Tyrannosaurus rex came from the Archaeopterasaurus in the late Triassic period, and was only 09 meters, less than 1 meter, weighing only 5 to 7 kilograms, the middle of the jaw does not have the extra attachment device that some vegetarian dinosaurs have, but has a movable joint in the middle of the jaw that allows the jaw to flex, and when the jaws bite something, it will clamp tightly on the prey, as Tyrannosaurus rex has this jaw. There are also some interesting things about Archaeraptors, such as having 5 "fingers", and the number of "fingers" of carnivorous dinosaurs that appeared later tended to decrease, and in the end, large carnivorous dinosaurs such as Tyrannosaurus rex only had three or two "fingers" left, and Archaeraptor only had three vertebrae at the waist to support its small belt, and when the later dinosaurs got bigger and bigger, the number of vertebrae supporting the belt increased. Okay, that's all for today, we'll see you next time!