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The earliest known sauropod dinosaur

机译：已知最早的蜥脚类恐龙

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Sauropods were a very successful group of dinosaurs during the Jurassic and Cretaceous periods, but their earlier history is poorly known. Until now, the earliest reported sauropod bones were from the Early Jurassic, and the only tentative evidence of earlier sauropods was in the form of controversial footprints. Here we report the discovery of an incomplete sauropod skeleton from the Late Triassic period of Thailand, which provides the first osteological evidence of pre-Jurassic sauropods. This dinosaur is markedly different from prosauropods and substantiates theoretical predictions that there was a fairly long period of sauropod evolution during the Triassic.
机译：蜥脚类恐龙是侏罗纪和白垩纪时期非常成功的恐龙群，但它们的早期历史鲜为人知。到目前为止，据报道最早的蜥脚类恐龙骨骼来自侏罗纪早期，而早期蜥脚类恐龙的唯一初步证据是有争议的脚印形式。在这里，我们报道了泰国三叠纪晚期发现的不完整蜥脚类动物骨骼的发现，这为侏罗纪前蜥脚类动物的首次骨学证据提供了证据。该恐龙与原脚足纲动物明显不同，并证实了三叠纪期间蜥脚类恐龙进化相当长的理论预测。

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