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作品数:14 被引量:21H指数:2
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内蒙古晚白垩世二连组似鸟龙科(恐龙:兽脚类)新材料(英文)
Ornithomimosaurian theropods is a group of highly specialized coelurosaurian dinosaurs,characterized by their ...
姚熙
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An Updated Review of the Middle-Late Jurassic Yanliao Biota: Chronology,Taphonomy,Paleontology and Paleoecology被引量:7
2016年
The northeastern Chinese Yanliao Biota (sometimes called the Daohugou Biota) comprises numerous, frequently spectacular fossils of non-marine organisms, occurring in Middle-Upper Jurassic strata in western Liaoning, northern Hebei, and southeastern Inner Mongolia. The biota lasted for about 10 million years, divided into two phases: the Bathonian-Callovian Daohugou phase (about 168-164 million years ago) and the Oxfordian Linglongta phase (164-159 million years ago). The Yanliao fossils are often taphonomically exceptional (many vertebrate skeletons, for example, are complete and accompanied by preserved integumentary features), and not only are taxonomically diverse but also include the oldest known representatives of many groups of plants, invertebrates, and vertebrates. These fossils have provided significant new information regarding the origins and early evolution of such clades as fleas, birds, and mammals, in addition to the evolution of some major biological structures such as feathers, and have demonstrated the existence of a complex terrestrial ecosystem in northeast China around the time of the Middle-Late Jurassic boundary.
XU XingZHOU ZhongheCorwin SULLIVANWANG YuanREN Dong
A large-sized basal ankylopollexian from East Asia, shedding light on early biogeographic history of Iguanodontia被引量:1
2018年
A presumably mostly quadrupedal ankylopollexian iguanodontian, Bayannurosaurus perfectus gen. et sp. nov., is reported here, and is represented by an excellently well-preserved skeleton from the Lower Cretaceous Bayingebi Formation of Inner Mongolia, China. The diagnosis of the taxon includes several autapomorphies, notably a dorsally directed, strap-like posterodorsal process of the jugal and a horizontally oriented preacetabular process of the ilium. The nearly complete caudal series retains eight posterior-most caudals with procoelous, trapezoidal centra in dorsal view, and the last three caudals are fully fused. The discovery ofB. perfectus opens a critical new window on the early evolution and intercontinental dispersal of lguanodontia. The skeleton displays a transitional morphology between nonbadrosauriform ankylopollexians and Hadrosauriformes. A phylogenetic analysis indicates that Bayannurosaurus is positioned higher on the tree than Hypselospinus, but below Ouranosaurus just outside of Hadrosauriformes. The tree topology of Iguanodontia with temporal and spatial constraints reveals a possible biogeographic scenario supported by the statistical dispersal-vicariance analysis: around the J/K boundary, non-hadrosauriform ankylopollexians experienced multiple dispersal events from Europe to Asia, accompanying the coeval fall of the global sea level.
Xing XuQingwei TanYilong GaoZhiqiang BaoZhigang YinBin GuoJunyou WangLin TanYuguang ZhangHai Xing
内蒙古二连达巴苏组的地层学、沉积学与古生物学研究综述
内蒙古二连盐池地区的上白垩统二连达巴苏组是一套由浅灰色细砂岩、粗砂岩和砂砾岩夹带杂色泥岩和粉砂岩组成的陆相碎屑沉积物。这套地层产数量丰富、种类繁多的恐龙化石以及大量的微体古生物化石。基于前人发表的研究成果,本研究系统地总...
邢海贺一鸣李丽国席党鹏
关键词:恐龙化石
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Large theropod teeth from the Upper Cretaceous of Jiangxi, southern China被引量:1
2015年
M0Jin—Y10uXU Xing
关键词:动物学古脊椎动物学
Comparative Osteology and Phylogenetic Relationship of Edmontosaurus and Shantungosaurus (Dinosauria:Hadrosauridae) from the Upper Cretaceous of North America and East Asia被引量:2
2014年
The close affinity between Edmontosaurus and Shantungosaurus is corroborated on the basis of the following shared features:an occipital condyle deflected strongly posteroventrally; a posterodorsally reflected, lip-shaped oral margin of the premaxilla, with a deep, oval concavity at the anteromedial corner of the bone; a well-demarcated posterodorsal margin of the deeply excavated circumnarial fossa formed by a prominent arched ridge along the entire posterior half of the lateroventral border of the nasal; an anteroposteriorly broad jugal process of the postorbital; a strongly concave dorsal surface of the paired frontals; seven teeth per alveolus in the middle of the dentary tooth row; and a circular distal blade of the pubis that is much more expanded ventrally than dorsally. A revised phylogenetic analysis of Hadrosauroidea recovers a sister taxon relationship between Edmontosaurus and Shantungosaurus. Kerberosaurus is recovered as the sister taxon to the clade formed exclusively by these two genera. The clade Edmontosaurini could be defined as the least inclusive clade containing Kerberosaurus and Edmontosaurus, which is currently composed of the genera Kerberosaurus, Edmontosaurus, and Shantungosaurus. Zhuchengosaurus and Huaxiaosaurus,both from the Upper Cretaceous Wangshi Group in Zhucheng, are interpreted as junior synonyms of Shantungosaurus. Kundurosaurus is likewise considered a junior synonym of Kerberosaurus. The strict consensus tree together with biogeographic information indicates that the clade Edmontosaurini originated in Asia and subsequently dispersed into North America.
XING HaiZHAO XijinWANG KebaiLI DunjingCHEN ShuqingJordan C.MALLONZHANG YanxiaXU Xing
小盗龙亚科(兽脚亚目:驰龙科)——新标本及简评复合骨在兽脚亚目中的演化(英文)
2016年
小盗龙亚科是驰龙科兽脚类恐龙中新近发现的一个亚群,多数属种产自中国辽宁西部下白垩统热河群。本文描记一件产自辽宁省朝阳县大平房地区九佛堂组(热河群上段)的小盗龙亚科的新标本,该标本具有一些未曾报道过的有趣形态特征。尤其值得关注的是,一些特征呈现出介于中国鸟龙和小盗龙之间的过渡状态,其中部分来自牙齿和坐骨。这些特征突出显示了在更接近典型驰龙类的中国鸟龙和具有许多伤齿龙科特征的小盗龙之间存在着一系列的形态变异。然而,这些变异特征在分类上的意义尚未得到充分评估。特别值得一提的是该标本中相互愈合的耻骨和肠骨,这一特征有助于阐明复合骨在兽脚类恐龙中的演化模式。初步分析显示许多鸟类的复合骨都是通过在过型形成过程中各组分的顺序愈合形成的。
徐星李峰
关键词:下白垩统热河群复合骨
辽西下白垩统热河群—新微型驰龙类恐龙和热河生物群驰龙类的生态位分化(英文)被引量:2
2017年
早白垩世热河生物群的驰龙类恐龙在分类和形态上多样化程度很高,其中的赵氏小盗龙曾被认为是已知体型最小的非鸟兽脚类恐龙之一。然而这个观点依据的标本都处于相对早期的生长发育阶段,因此热河生物群驰龙类恐龙的体型下限仍不明确。本文依据一件产自辽宁省凌源县四合当下白垩统义县组(热河群中部)的标本,描述驰龙类一新种,杨氏钟健龙。这一新种可归入小盗龙类,但它在很多特征上不同于其他小盗龙类,其中最明显的区别是其相对长的钩状突愈合于背肋上,肱骨具有强烈内倾的近端,肱骨三角嵴上有一窗孔,尺骨略长于肱骨,并具有窄跖型的足。最重要的是,已为成年个体的杨氏钟健龙正模估计体重约为0.31 kg,这证实了热河生物群的一些驰龙类恐龙属于已知体型最小的非鸟恐龙。初步分析显示热河生物群驰龙类恐龙有生态位分化的情况,这一现象在中生代恐龙动物群中报道很少。
徐星秦子川
关键词:下白垩统热河群兽脚类驰龙类
冠龙手部三维数字建模与初步功能分析被引量:2
2015年
冠龙是一种生活于侏罗纪晚期的基干暴龙类,现已发现的化石皆产于中国新疆准噶尔盆地的石树沟组。本次研究使用激光非接触数据化仪对冠龙标本IVPP V14531的左手进行扫描,用RapidformXOV2软件建立单块骨骼三维数字模型,然后用AutodeskMaya软件关联手部各块骨骼,建立整个手部的功能性三维数字模型。尽管基于骨骼化石对兽脚类恐龙手指活动范围进行推测受制于一些不确定性因素,但我们还是能够给出手指的可能活动范围,来测算兽脚类恐龙手指的背展和屈曲度。对模型的分析显示,冠龙手指Ⅱ和Ⅲ的有限背展度介于基干僵尾龙高棘龙和虚骨龙类当中的恐爪龙之间,有限屈曲度变化范围很大,但在高棘龙和恐爪龙变化范围之内;手指Ⅳ的掌骨和指节间关节几乎没有活动性,第一个指节间关节背展度很大,甚至强于高棘龙,第二个指节间关节活动性和高棘龙相当,第三个指节间关节活动性和恐爪龙相当。这也许暗示兽脚类恐龙在演化过程中,手指背展能力逐渐减弱,而屈曲能力逐步加强。这一演化趋势是否存在还需要更多相关数据来检验。
余逸伦舒克文徐星
关键词:兽脚类手部
山东晚白垩世一新的巨龙类恐龙被引量:2
2017年
记述了产自山东诸城上白垩统王氏群中一个较完整的蜥脚类恐龙肱骨(ZJZ-57)。它具有一些进步特征,如肱骨三角胸嵴向远端扩展,肱骨近端外侧1/3处发育隆凸,表明其属于较进步的巨龙类成员。另外,它具有一些独特的鉴定特征组合区别于其他任何巨龙类:近端横向强烈扩展,近端最大宽度与骨干长度之比为0.55;骨干粗壮,粗壮指数为0.39。综合研究表明,ZJZ-57所属个体代表了一种新的巨龙类恐龙:臧家庄诸城巨龙(Zhuchengtitan zangjiazhuangensis gen.et sp.nov.),它可能与Opisthocoelicaudia的亲缘关系较接近。这是山东晚白垩世地层中首次发现的巨龙类恐龙。
莫进尤王克柏陈树清王培业徐星
关键词:晚白垩世
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