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ISBN: 9787573108975
File size: 33667 KB

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by 英童书坊编纂中心

ebook

三叠纪是中生代的第一个纪，开始于2.5亿年前，结束与2亿年前，延续了约5000万年。在这一时期，不同种类的恐龙开始从爬行动物逐渐进化而来，并不断发展壮大，为恐龙家族在侏罗纪时期的大发展奠定了基础。本书主要讲述三叠纪时期的恐龙，包括埃雷拉龙、蓓天翼龙、腔骨龙、板龙等。