Meng Qingjin, Liu Jinyuan, Varricchio David J, Huang Timothy, Gao Chunling
Dalian Natural History Museum, 40 Xicun Street, Heishijiao, Shahekou, Dalian, China.
Nature. 2004 Sep 9;431(7005):145-6. doi: 10.1038/431145a.
Crocodilians and birds show extensive parental care of their young, but whether this behaviour evolved independently in these two groups of living archosaurs is unknown - in part because features of parenting among related fossil groups such as dinosaurs are unclear. A dramatic specimen of the small ornithischian dinosaur Psittacosaurus sp. (Dalian Natural History Museum D2156) from Liaoning in China reveals a single adult clustered with 34 juveniles within an area of 0.5 square metres, providing strong evidence for post-hatching parental care in Dinosauria.
鳄鱼和鸟类对它们的幼崽表现出广泛的亲代抚育行为，但这种行为在这两类现存主龙类动物中是否独立演化尚不清楚——部分原因是恐龙等相关化石类群的育幼特征尚不明确。来自中国辽宁的一件小型鸟脚亚目恐龙鹦鹉嘴龙属（Psittacosaurus sp.）的引人注目的标本（大连自然历史博物馆D2156）显示，在一个面积为0.5平方米的区域内，有一只成年个体与34只幼崽聚集在一起，这为恐龙孵化后的亲代抚育提供了有力证据。
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