How many species of ancient dinosaurs were there?

Dinosaurs are one of the ancient creatures that lived on Earth, and there are many species. At present, there are about 1,000 species of dinosaurs that have been discovered and named. These dinosaur species are divided into different families, genera and species according to different characteristics, such as theropods, ankylosaurs, sauropods, ceratosaurians, etc.

It should be noted that during the period when ancient dinosaurs appeared and evolved (ranging from about 240 million to 66 million years ago), the earth's environment and ecological types were also constantly changing, so the types and numbers of dinosaurs also changed accordingly. At the same time, due to the incompleteness of the fossil record, there may be some dinosaur species that have not been discovered and named.

In general, the rich species and peculiar forms of dinosaurs have always been an important object of concern and research, and are of great significance to understanding the evolution of life and the process of earth history.

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