The ancestors of dinosaurs were a group of reptiles called "Crurotarsi". These reptiles lived in the early Triassic period, about 230 million years ago. At that time, they were not like the crocodiles we know now, but more like other types of reptiles. Most of these reptiles were quadrupeds, like modern crocodiles or lizards. These animals generally have strong bodies and tails, sharp teeth and claws.
During this long evolutionary process, due to environmental changes, natural selection and gene mutations, the crocodiles gradually changed and differentiated into different branches. Among them, dinosaurs are a branch, and they gradually evolved into giant animals that walked on two legs.
In short, dinosaurs evolved from another existing branch of reptiles, and their evolutionary history is very complicated. The specific details still need to be revealed through research in fossil records and genetics.
animal tags：
you may also like
Abalone is a type of shellfish, with multiple species and subspecies of abalone existing around the world. Here are some common abalone species: Japanese abalone (Haliotis discus hannai): Japanese abalone is one of the most common and widely farmed species. It has a round shell with...
Tigers are very agile and agile cats with strong and muscular body structures, powerful claws and powerful tails. Therefore, tigers can climb some trees that are softer and not particularly steep. However, tigers are not as adept at climbing trees as leopards are. In cont...
Here are some simple steps to raise crayfish:1. Prepare the tank: Choose a tank of appropriate size and try to avoid using toxic or polluted materials. There should be enough sand or gravel at the bottom of the tank for the crayfish to dig holes or hide in.2. Adjust the water quality: Crayfish need...
There are many types of dinosaurs. According to different classification systems and research results, different numbers of dinosaur species can be obtained. The following are some widely recognized dinosaur species:1. Theropods: Such as Tyrannosaurus, Velociraptor, and Ornithopods, th...
There are many kinds of white snakes, the following are some common ones:1. Albino short-tailed snake: This is an unconventional snake from America. They are small in size, pure white or light yellow in body, and pink in eyes. Albino short-tailed snakes are usually produced by gene mut...
Teaching a cat to use the litter box is an important training process. Here are some steps and tips: 1. Choose the right litter box: Choose an appropriately sized litter box and make sure your cat can get in and out of it easily. For kittens, choose a shallower basin to m...
If you have parrot chicks that need to be fed, please refer to the following feeding tutorials: 1. Feeding method: - Newly born chicks need to be raised in a warm, quiet, dry and clean place. They need a warm environment with the lights on 24 hours...
The time it takes for a tadpole to turn into a young frog will vary, depending on factors such as the species of tadpole and environmental conditions. Generally speaking, the transition from tadpole to young frog usually takes a few weeks to a few months. During this proc...
Email: jsset#163.com (change # to @) Please indicate your purpose of visit! Guangdong ICP No. 2022053326 XML| map| Chinese
