Plesiosaurs developed their distinctive long necks rapidly, evolving within a span of five million years, as revealed by a recent study introducing a new ancestor, Chusaurus xiangensis. Plesiosaurs developed their iconic long necks in a remarkably short span of time, research indicates. These
New research indicates that plesiosaurs, marine reptiles known for their long necks, evolved these unique features within five million years, about 250 million years ago.
These elongated necks, believed to have been utilized to chase fast-moving fish, evolved quickly over a five-million-year period approximately 250 million years ago.and carried out by scientists in China and the UK, show that aknown as pachypleurosaur lengthened their necks mainly by adding new vertebrae. This species had 25 vertebrae, while some Lateplesiosaurs such as Elasmosaurus had as many as 72, and its neck was five times the length of its trunk.
Image showing fast rates of evolution and the specimens. Research indicates that plesiosaurs, marine reptiles known for their long necks, evolved these unique features within five million years, about 250 million years ago. Credit: Qi-Ling Liu “The Early Triassic was a time of recovery and marine reptiles evolved very fast at that time, most of them predators of the shrimps, fishes, and other sea creatures. They had originated right after the extinction, so we know their rates of change were extremely rapid in the new world after the crisis.”lengthened their necks mainly by adding new vertebrae,” said Professor Cheng Long, of the Wuhan Centre of China Geological Survey, a co-supervisor.
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