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dinosaurs
One of the two orders. Dinosaurs are divided into two groups according to the different structure of the belt, namely Saurostegia and ornithischida. The difference between them in the structure of the girth is mainly the difference in the shape of the pubis. The girth of the lizard's buttocks is trisected from the side, the pubic bone extends forward under the gut, and the ischium extends backward, which is similar in structure
lizard
Class similarity; The pubis in ornithians has an anterior process forward, parallel to the ischium backward, and the girth has a radiate structure when viewed from the side, similar to that of birds.
- Chinese name
- saurischia
- world
- animalia
- The door
- Chordate phylum
- subphyla
- Vertebrate subphyla
- The outline
- reptilia
- Orders,
- saurischia
catalogue
saurischia
In the Early Cretaceous dinosaur world in western Liaoning, feathered dinosaurs attracted much attention because of their special blood relationship with birds. All of these dinosaurs are classified in the saurobreds group
theropoda
.
A dinosaur of the order Saurischia, whose waistband bones were arranged like those of modern reptiles, hence its name. Saurobreds are one of two large orders of dinosaurs, the other being Ornithischia (Ornithischia). The main distinguishing feature of sauropygmy is the downward and forward extension of the pubic bone in the waistband. It has been suggested that sauropetes evolved from the small bipedal walking primitive dinosaurs called traurodontids. They evolved a little earlier than
ornithischia
It began to appear later than the Triassic Period (230-280 million years ago).
Sauropoda
Sauropoda is the other major suborder, all of which walk on four legs and most of which are herbivorous. The earliest and more primitive suborder in this suborder is Palaeosauria (Platysauria). The ancient Sauropods were large and bulky, Yu
Jurassic Period
It went extinct early (280 million to 187 million years ago), but evolved into the larger and more advanced sauropods, which were one of the dominant dinosaur groups until the end of the Cretaceous period (66.4 million years ago). Sauropods include the largest of all dinosaur groups, such as
Apatosaurus
Apatosaurus (formerly Brontosaurus), Diplodocus, and Brachiosaurus (Brachiosaurus). Generally speaking, sauropods were characterized by large size, long neck and tail, small head, columnar legs, and thick, solid limbs.
Another suborder is Staurikosauria. Only partial fossils of a few species are known about this suborder. But it seems that this suborder consisted of medium-sized carnivorous species resembling theropods. Coelurosaurs, carnosaurs, and Sauropods survived until the Cretaceous, but were less numerous than ornithischian dinosaurs.
Diplosauridae
Also known as diplodocus, yes
saurischia
the
Dinosaur
,
diplodocus
,
Apatosaurus
(
brontosaurus
All belong to the Diplodocus group, which includes the longest dinosaurs, the longest living creatures on land on Earth, for example
Dragon
and
seismosaurus
The body size can be up to 40 meters to 50 meters.
Diplodocus dinosaurs had long necks and a long pointed tail,
skeleton
The shape of Diplodocus made them lighter than other sauropods, and the hind legs were longer than the front legs, making their body shape slightly forward, the head shape of Diplodocus was longer than that of other sauropods, the nostrils were located near the eyes, the teeth were short clubbed, and the body was herbivorous. Computer simulations show that diplodocus could easily wave their long tails and produce about 200
decibel
Maybe they were using this as a way to scare off predatory animals that attacked them, some diplodocus
fossil
The tail bone is fractured, supporting this theory.
Fossils of Apatosaurus were first discovered in 1877, missing only the skull. The complete Apatosaurus fossil was excavated in 1975.
Tyrannosaurus was one of the largest carnivores that ever walked the earth, second only to Spinosaurus. According to the most complete preserved Tyrannosaur fossil "Su" (number FMNH PR2081), "Su" was 12.8 meters long, 10.85 tons, and 4 meters high at the hip. That's second only to the largest
Spinosaurus
It is larger than those discovered in recent years, such as Manasaurus, Sharkdon, and Maputosaurus.
Basic information
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Body length
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16-30 meters
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weight
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20-30 tons
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Feeding habits
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herbivory
|
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Age of survival
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On the evening of
Jurassic
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sort
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Sauropodomorphs Sauropodomorphs Primitive sauropodomorphs
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paraphrase
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Mamenchiosaurus means the dinosaur found in Mamenchiosaurus
|
The skeleton of Mamensaurus
With a body length of 22 to 35 meters, with the neck accounting for half of its length, Mamenxisaurus once lived on Earth
neck
The longest animal. The neck of Mamenxisaurus was supported by long, overlapping cervical vertebrae, which made it very rigid and turned very slowly. The muscles in its neck are quite strong, supporting its small snake-like head. The Mamenchisaurus was as long as a tennis court, but its body was "slim." Its vertebrae are full of cavities, making it very small relative to its massive body. 145 million years ago, the area where dinosaurs lived was covered with vast, dense forests filled with redwood and redwood trees. Swarms of Mamenxiosaurs traversed the forest, using their small, spiky teeth to nibble at leaves and top twigs that other dinosaurs could not reach. Mamenchisaurus walked on all four legs, its long, thin tail trailing behind it. During mating season, males pummeled each other with their tails in a battle for females.
