アメリカ自然史博物館のインスタグラム(amnh) - 8月19日 08時10分

#TsengTakeover, 6/7: The fossil skeletons of animals that you see on public exhibit are either extremely rare because of their completeness, or were assembled from parts of different individuals of similar sizes to create a composite skeleton demonstrating the animals’ proportions. The fossil dog collection at the American Museum of Natural History is not only the largest of its kind, but it also contains some of the most complete fossil skeletons known for dogs. This photo shows a nearly complete skeleton of the extinct hyena-like dog Aelurodon. Having more than just a skull or part of a leg allows paleontologists to reconstruct the proportions of these extinct predators, and in turn knowing something about their lifestyle and mode of hunting. From studying the elbows of all the fossil dog species, my collaborators and I found that their range of joint movement evolved from grappling towards long-distance running with the same timing as forested environments gave way to open savannah and grasslands over the past 30 million years in North America. This observation indicates that dog species diversified from ambush to also using long-distance hunting as feeding opportunities shifted with changing vegetation coverages.
AMNH/ @denisdenio #Takeover #InstagramTakeover #DogsofInstagram

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