Dinosaurs were thought to have shown a substantial diversification in their last 50 million years, from the mid-Cretaceous onwards, when new groups such as the duckbilled hadrosaurs, the horned ceratopsians, and many new predators appeared.
This mid-Cretaceous expansion seemed to coincide with the Cretaceous Terrestrial Revolution, the time when modern ecosystems became established on land, with flowering plants, social insects, lizards, snakes, birds and mammals.
A thorough numerical study now shows that this picture is incorrect: dinosaurs had done all their diversifying much earlier in their history, and they did not participate in the Cretaceous explosion of life on land.
Proceedings of the Royal Society B: Biological Sciences
Proceedings B is the Royal Society's flagship biological research journal, dedicated to the rapid publication and broad dissemination of high-quality research papers, reviews and comment and reply papers. The scope of journal is diverse and is especially strong in organismal biology.
publishing.royalsociety/proceedingsb
Комментариев нет:
Отправить комментарий