2011年第5期目录
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封面故事：含胚胎的白台沟潜龙化石正型标本。首次发现于中国辽宁早白垩世的热河生物群中，其胚胎为不具备硬壳的革质蛋。研究认为潜龙这样的离龙类爬行动物终生生活在水中，怀孕后将卵保留在体内并利用体温进行孵化, 待幼体发育成熟后再将其排出体外, 属于比较特殊的“卵胎生”生殖方式。该研究对认识离龙类爬行动物的生殖行为和方式具有重要科学意义。这项由中国地质科学院地质所季强研究员主持的研究成果，当选2010年度中国地质科学院十大科技进展，排名第十名。（图片提供：季 强）
Cover Story：Eurymeric specimen of Baitaigou embryo-bearing deep-water dragon fossil. It was discovered for the first time in Upper Cretaceous Rehe biota of Liaoning Province, and its embryo was a leather-matter egg without a shell. As a kind of choristoderes reptile, the deep-water dragon is considered to have lived in waters all its life. Hav-ing been pregnant, it retained the ovum in its body and hatched the ovum with its body temperature, and subsequently discharged the larva out of the body after the growth and maturation of the larva, thus belonging to the rather unusual reproduction mode of ovoviviparity. This study is of great scientific significance in understanding the reproduction behaviors and modes of chroistoderes reptiles. The research achievement directed by Professor JI Qiang, Institute of Geology, CAGS, ranks the tenth among “Top Ten Scientific and Technological Progresses of CAGS in 2010”. (photo by JI Qiang)
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