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地质论评  2000 

莱阳盆地莱阳群恐龙足迹化石的新发现

Keywords: 早白垩世莱阳群山东莱阳盆地恐龙足迹化石

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Abstract:

在山东莱阳盆地早白垩世莱阳群龙旺庄组发现15个足迹化石。化石产在灰绿色细砾粗砂岩(转石)的下层面,呈层底凸形(Convexhyporelief)保存。研究表明,足迹为二足行走、趾行式、三趾型,趾端具尖、长爪。足长约13cm,长大于宽,近中趾对称。趾间角较大:平均值Ⅱ27°Ⅲ27.2°Ⅳ,Ⅱ、Ⅳ趾夹角平均54.2°。趾垫不清晰,无尾迹印痕。经研究,笔者认为这是一新的足迹类型,命名为Paragrallatorichnogen.nov.,并将其归入CoelurosauriaHuene1914次亚目,Anchisauripodidae(Lull1904)足迹科。即该足迹系由小型兽脚类恐龙――虚骨龙类所形成。恐龙足迹形成于滨湖相―河流相环境中。

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