中国辽西白垩纪甲龙(恐龙,鸟臀目)研究新进展（英文）  

Fish Hunting Ankylosaurs( Dinosauria,Ornithischia) from the Cretaceous of China

作　　者：季强[1] 吴肖春 程延年 滕芳芳 王旭日[1] 季燕南[5] 

机构地区：[1]中国地质科学院地质研究所 [2]加拿大自然博物馆 [3]台中自然科学博物馆,中国台湾台中40453 [4]星海古生物博物馆 [5]中国地质环境监测院

出　　处：《地质学刊》2016年第2期183-190,共8页Journal of Geology

基　　金：supported by grants from the Ministry of Science and Technology of China ( 2012CD822000);China Geological Survey ( 121202114026801);Canadian Museum of Nature ( RS34);National Science Foundation ( NSC-100-2116-M178-003)~~

摘　　要：所有鸟臀目恐龙都是植食性或杂食性。鸟臀目恐龙中的奇异辽宁龙是一种体型很小的甲龙,以往均认为与其他甲龙一样生活在陆地上,主要以植物为食。报道了中国发现的一件新的奇异辽宁龙标本,该标本体腔内保存了很多鱼类化石骨骼,认为这些鱼类残骸是甲龙胃或肠里的残留物,因此可以作为该恐龙食肉的有力证据。奇异辽宁龙颊齿齿冠具有长而分叉的齿饰,这种齿系可以穿透像鱼类一样的小动物。恐龙前、后肢指(趾)爪演变得非常锋利同样可以证明其适应吃肉的生活方式。奇异辽宁龙腹部甲板演化成盾状及荐骨-腰带关联疏松也说明其适应水生生活,腹部甲板可以保护腹部身体免受水下攻击。同理,神经弓与椎体之间缝合线开阔不能再作为正型标本的幼年特征。奇异辽宁龙是自18世纪发现恐龙以来已知的第一种肉食性鸟臀目恐龙,不仅代表了第一种水生或半水生有甲类恐龙,更是目前已知最小的鸟臀目恐龙。All ornithischian dinosaurs are herbivorous or omnivorous. Ornithischian Liaoningosaurus paradoxus Xu et al., 2001 is an ankylosaur. Here we report a new specimen ofn L. paradoxus from China. It contains a number of fish skeletons. We interpret those remains as stomach or gut contents and hence as strong evidence for the meat-eating diet of the dinosaur. With elongate and fork-like denticles of cheek tooth crowns, L. paradoxus has a dentition capable of penetrating into animals like small fishes. The carnivorous adaptation of the dinosaur is also supported by the ungual modification to a sharp claw in both the fore-and hind-limbs. The evolution of a shield-like ventral armor plate and the loose sacrum-pelvic connection suggest that L. paradoxus may have adopted an aquatic way of life, using the ventral armor plate to protect the body from underwater attacks; as such, the open suture between the neural arch and centrum of the vertebrae cannot be used to indicate the juvenile nature of the type specimen. L. paradoxus is the first carnivorous orni-thischian dinosaur since dinosaur was first known in the 18th century and represents not only the first aquatic or semi aquatic example of armored dinosaurs but also the smallest species of ornithischian dinosaur so far known.

关 键 词：甲龙 结节龙类 早白垩世 义县组 辽西 

分 类 号：Q915.23[天文地球—古生物学与地层学] P534.53[生物学—古生物学]