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1.
本文对我国恐龙蛋研究历史作了简略回顾, 大致分为三个研究阶段：形态分类、半自然分类和自然分类阶段。本文根据中国江西赣州晚白垩世南雄组产出的两枚含胚胎恐龙蛋的研究, 认为这两枚恐龙蛋处于不同的发育阶段, 蛋体形态和蛋壳显微结构表明它们同属于以往在广东发现的瑶屯巨型蛋(Macroolithus yaotunensis), 骨骼学研究表明它们可能是黄氏河源龙(Heyuannia huangi)或与其亲缘关系相近的窃蛋龙所产。江西赣州晚白垩世含胚胎恐龙蛋的首次发现标志着我国恐龙蛋研究已进入自然分类阶段 相似文献
2.
浙江白垩纪恐龙与恐龙蛋化石的时空分布 总被引：2，自引：0，他引：2
浙江省恐龙化石地质遗迹调查表明,全省有9个白垩纪陆相红层盆地产恐龙和恐龙蛋化石,至今已发现有4科5属5种恐龙骨骼和7科11属24种恐龙蛋化石。浙江省恐龙和恐龙蛋化石主要分布在天台盆地和金衢盆地的东阳、衢州、龙游、金华、浦江、兰溪一带,主要产于天台群的赖家组,衢江群的金华组、衢县组。永康、南马、新昌、嵊州、仙居、诸暨、湖山等地永康群朝川组、方岩组中也有较丰富的恐龙化石。依据恐龙和恐龙蛋化石在盆地内地层中的分布、地层的同位素年龄和相伴生的其他生物群特征等分析表明,恐龙和恐龙蛋化石的赋存地质时代以晚白垩世为主。此外,恐龙和恐龙蛋化石在浙江的广泛分布表明该地区地质历史时期气候温暖,植被茂盛,水资源丰富,是恐龙及其他生物生存繁衍的理想场所。 相似文献
3.
4.
《China Geology》2018,1(1):28-35
An alvarezsaurid dinosaur skeleton was discovered from the Late Cretaceous Qiupa Formation of Luanchuan, Henan Province of central China. It represents a new alvarezsaurid dinosaur Qiupanykus zhangi gen. et sp. nov. A phylogenetic analysis recovers Qiupanykus nested within the unresolved clade, which includes Asian and north American taxa. The skeleton of the new specimen is preserved in association with eggshells. The eggshell morphologies show that these eggs belong to oviraptorid eggs, skeletal remains of which were discovered from the same area. The alvarezsaurid skeleton associated with eggshell fragments may indicate that these eggs were broken by the strong thumb-claws of the former and that alvarezsaurid dinosaurs may be egg-eaters. 相似文献
5.
记叙了中国陕西省商洛市邵涧村下白垩统东河群2个大型兽脚类恐龙足迹,并将其归于Megalosauripus isp.。
东河群的时代与热河生物群同期,邵涧Megalosauripus isp. 可能可与热河生物群的大型兽脚类恐龙之足部形态做简
单对比。此外,邵涧Megalosauripus isp.造迹者的体长约为7.4m,这意味着早白垩世的陕西中南部亦存在着大型的
兽脚类恐龙。邵涧Megalosauripus isp.的发现,不仅为中国早白垩世恐龙足迹增加了新的成员,而且为将来在该地
区下白垩统中发现大型兽脚类恐龙的骨骼化石提供了确凿的依据。 相似文献
6.
The Coll de Nargó area (Lleida Province, south-central Pyrenees) has yielded thousands of dinosaur eggs distributed in more than 30 levels across 370 m of Upper Cretaceous Tremp Formation deposits. Two stratigraphic units yielding dinosaur eggshells, eggs and clutches, can be distinguished. Multiple eggshells were collected from up to 75 different in situ clutches, located in consecutive stratigraphical levels throughout the Mas de Pinyes section. Four different oospecies have been recognized: Megaloolithus aureliensis, Megaloolithus siruguei, Megaloolithus cf. baghensis and Cairanoolithus cf. roussetensis. In absence of typical biochronological markers, fossil eggshells may have potential as a tool for dating. Based on these ootaxa, three oozones can be established along the stratigraphic section. The lower assemblage is composed by M. aureliensis, M. siruguei and Cairanoolithus cf. roussetensis; the middle one consists only of M. siruguei, while the upper oozone is characterized by M. cf. baghensis. Results suggest that the age of Coll de Nargó rocks ranges from the latest Campanian to the beginning of the Late Maastrichtian. Also reported is the first evidence of the oogenus Cairanoolithus outside of France, where it was regarded as an endemic ootaxon. The Coll de Nargó area is considered to be one of the most important dinosaur nesting areas in Europe recurrently used by several dinosaurs during a long time span. Finally, the presence of fossilized eggshell membrane in several specimens from Coll de Nargó contributes to understanding the taphonomic process of megaloolithid eggs in this area. 相似文献
7.
Dinosaur eggs or fragments are abundant and extensively distributed in China. They can be very informative in biostratigraphic division and correlation of continental strata where other fossils are relatively lacking. Despite remarkable discoveries of vertebrate fossils, particularly dinosaur eggs and skeletons from the middle and Late Cretaceous of both northern and southern China, there is hardly any direct evidence for the ages of the vertebrate-bearing terrestrial deposits. To constrain their depositional ages, here we have obtained SIMS U–Pb zircon ages from the tuffs interbedded with dinosaur egg-bearing sediments from the Laijia and Chichengshan formations of the terrestrial red deposits of the Late Cretaceous in the Tiantai Basin, Zhejiang Province, southeastern China. The SIMS zircon U–Pb ages from the Laijia and Chichengshan formations are about 96–99 Ma (Cenomanian) and 91–94 Ma (Turonian), respectively, providing direct time constraints on the vertebrate and dinosaur egg evolution in the Late Cretaceous as well as a basis for correlation with terrestrial Cretaceous deposits in other regions of southern and northern China. 相似文献
8.
黑龙江嘉荫地区晚白垩世兽脚类恐龙牙齿的发现及其意义 总被引：1，自引：0，他引：1
黑龙江嘉荫地区是中国最早发现恐龙化石的产地,在我国晚白垩世恐龙的研究史上具有极其重要的意义。该地区曾发掘出土大量鸭嘴龙类化石,是研究大型鸟脚类恐龙尤其是鸭嘴龙类系统分类和演化的理想地区。但相对应于鸭嘴龙类化石来说,兽脚类恐龙化石在该地区的发现却较为鲜见,主要以牙齿的形式出现。本文主要对最近在该地发现的一批兽脚类恐龙的牙齿化石进行详细描述对比,初步研究显示含有霸王龙类、驰龙类、白鲨齿龙、福井盗龙以及可能为新的兽脚类恐龙的牙齿。 相似文献
9.
河南淅川盆地的恐龙蛋发现与研究始于1974年,淅川盆地恐龙蛋具有非常高的多样性,共计发现4个蛋科、6个蛋属、6个蛋种,尤其以树枝蛋类最为丰富。近年来,河南地质博物馆对全省地质遗迹调查过程中,在淅川盆地再次有新的恐龙蛋类型的发现,本文对其中的部分标本进行记述,根据壳单元呈多分叉的不规则树枝状,蛋壳厚度为1. 62~1. 74 mm,锥体间隙明显,壳单元自锥体上部开始出现分枝,蛋壳中部大多具有3~4个分枝,近蛋壳外表面形成融合层,蛋壳具有复杂的气孔系统等特征区别于其他类型的树枝蛋类,建立一新蛋种:大石桥树枝蛋（Dendroolithus dashiqiaoensis oosp. nov. )。通过对淅川盆地恐龙蛋分类与对比、不同类型恐龙蛋在地层中的分布研究,将有助于盆地内白垩纪红层的划分,也将为秦岭东段各盆地中同一时期红层的划分与对比、古地理、古环境和古气候等研究提供更加翔实的古生物学证据。 相似文献
10.
在江西赣州地区晚白垩世地层中发现的窃蛋龙类化石——赣州华南龙,属于进步窃蛋龙类,其独特的头部特征为研究窃蛋龙类恐龙的颅面演化、古地理分布及古生态环境提供重要信息;在辽西早白垩世义县组地层中发现的大型、前肢短的驰龙类恐龙——孙氏振元龙,为大型、短前肢类型的驰龙类提供羽毛形态学方面的重要信息,为研究驰龙类的多样性、鸟类羽毛以及飞行起源提供了重要依据;在辽西发现的喙嘴龙类翼龙——朝阳东方颌翼龙,是该地区晚侏罗世地层中发现的第一件翼龙标本,不仅填补了时代上的空白,同时对于印证晚侏罗世喙嘴龙类的辐射演化具有重要作用。这些重要发现对于研究窃蛋龙类的演化、驰龙类羽毛演化及鸟类羽毛起源等热点与难点问题提供了重要的参考依据,尤其在发现华南龙的基础上,命名了赣州恐龙动物群。 相似文献
11.
Two closely associated egg types occur at the same locality in the Upper Cretaceous (Maastrichtian) St. Mary River Formation in north central Montana. These specimens represent the first fossil eggs described from this formation. At least fifteen small ovoid eggs or egg portions are scattered through a 25 cm interval of rock. Five significantly larger, round eggs overlie these smaller eggs and are in close proximity to one another on a single bedding plane. The best preserved egg of the smaller size measures 36 mm × 62 mm and exhibits the prismatic, two-layered eggshell structure of a theropod egg. The dispersed distribution and inconsistent angles of these small eggs likely resulted from disturbance by subsequent nesting activity and/or possibly nest predation. At least twelve additional small prismatic eggs also occur at this site. We assign the small eggs as a new oogenus and oospecies, Tetonoolithus nelsoni, within the Prismatoolithidae. The large round eggs measure 130 mm in diameter and the eggshell displays substantial diagenetic alteration. These eggs likely belonged to a hadrosaur due to their similarity in egg size, shape, and eggshell thickness to Maiasaura eggs from the stratigraphically lower Two Medicine Formation. Eggs at different stratigraphic levels at this site indicate that conditions favorable to both dinosaur species persisted for an extended period of time. However, determining whether these dinosaurs occupied the nesting site at the same or different years remains beyond the resolution of the rock record. 相似文献
12.
A new specimen of ankylosaurine dinosaur Crichtonpelta benxiensis is described. The new specimen is based on a nearly completely preserved skull from the same quarry as the holotype of the mid-Cretaceous Sunjiawan Formation in Shuangmiao, Beipiao City, Liaoning Province, China. Cladistic analysis incorporating new information from the new specimen resolves Crichtonpelta benxiensis is more advanced than basal members of Ankylosauridae (Kunbarrasaurus, Liaoningosaurus, Chuanqilong, Cedarpelta, Gobisaurus and Shamosaurus) and represents the first diverging branch of Ankylosaurinae. Comparisons to other mid-Cretaceous ankylosaurid-bearing dinosaur assemblages in northern China indicate a late Early Cretaceous to early Late Cretaceous age for the Shuangmiao dinosaur assemblage. 相似文献
13.
The North American fossil record of dinosaur eggshells for the Cretaceous is primarily restricted to formations of the middle (Albian–Cenomanian) and uppermost (Campanian–Maastrichtian) stages, with a large gap in the record for intermediate stages. Here we describe a dinosaur eggshell assemblage from a formation that represents an intermediate and poorly fossiliferous stage of the Upper Cretaceous, the Santonian Milk River Formation of southern Alberta, Canada. The Milk River eggshell assemblage contains five eggshell taxa: Continuoolithus, Porituberoolithus, Prismatoolithus, Spheroolithus, and Triprismatoolithus. These ootaxa are most similar to those reported from younger Campanian–Maastrichtian formations of the northern Western Interior than they are to ootaxa reported from older middle Cretaceous formations (i.e., predominantly Macroelongatoolithus). Characteristics of the Milk River ootaxa indicate that they are ascribable to at least one ornithopod and four small theropod species. The taxonomic affinity of the eggshell assemblage is consistent with the dinosaur fauna known based on isolated teeth and fragmentary skeletal remains from the formation, although most ornithischians and large theropods are not represented by eggshell. Relative to the Milk River Formation eggshell, similar oospecies occurring in younger Cretaceous deposits tend to be somewhat thicker, which may reflect an increase in body size of various dinosaur lineages during the Late Cretaceous. 相似文献
14.
报道了吉林省公主岭早白垩世泉头组发现的一窝恐龙蛋化石。蛋化石近圆形,蛋壳厚度1.4~1.7 mm,蛋壳外表面均匀分布椭圆形或圆形大小不一的凹坑;蛋壳层由2、3个呈分树枝状的基本结构单元叠加而成,蛋壳基本单元之间气孔道阔大而不规则,靠近蛋壳外表面的基本结构单元相互连结、融合形成一层相对致密的薄层。据以上特征将其归为网形蛋科(Dictyoolithidae),网形蛋属(Dictyoolithus),定为一新种:公主岭网形蛋(Dictyoolithus gongzhulingensisoosp.nov.)。公主岭网形蛋是网形蛋类化石在中国东北地区的首次发现,同时也是早白垩世地层中网形蛋化石新的发现。 相似文献
15.
Kohei TANAKA Lü Junchang LIU Yi HUANG Zhiqing Yoshitsugu KOBAYASHI HUANG Dong Darla K. ZELENITSKY 《《地质学报》英文版》2012,86(2):294-303
The Zhutian and Dafeng formations (Upper Cretaceous) of the Heyuan Basin in northeastern Guangdong Province, China, have produced thousands of dinosaur eggs. Macromorphological features (egg diameter, egg shape, outer surface texture, and shell thickness) of 461 eggs were analyzed using non-destructive techniques and subjected to statistical analyses in order to assess their diversity and taxonomic affinities. Three types (1, 2 and 3) of eggs were discerned based on shape and outer surface morphology. Type 1 eggs are spherical to ellipsoidal in shape and have a rough surface. Three subtypes (Type 1-A-1, 1-A-2, and 1-B) are apparent from scatter plots and cluster analyses of egg diameters and shell thickness. Type 2 eggs are elongate with linear ornamentation on the surface, and are comparable to eggs that belong to the oofamily Elongatoolithidae. Type 3 eggs are elongate with a smooth surface, and are assigned to the oofamily Prismatoolithidae. Macromorphological features of the various egg types suggest that Type 1 could have been laid by ornithischian, sauropod or therizinosaur dinosaurs, Type 2 by oviraptorids, and Type 3 by troodontids. This study represents the first comprehensive statistical analysis of macrofeatures of dinosaur eggs, and reveals taxonomic diversity in the dinosaurs that were laying eggs in the Upper Cretaceous Heyuan area heretofore unrecognized in skeletal remains. 相似文献
16.
报道了吉林省公主岭早白垩世泉头组发现的一窝恐龙蛋化石。蛋化石近圆形，蛋壳厚度1．4～1．7mm，蛋壳外表面均匀分布椭圆形或圆形大小不一的凹坑；蛋壳层由2、3个呈分树枝状的基本结构单元叠加而成，蛋壳基本单元之间气孔道阔大而不规则，靠近蛋壳外表面的基本结构单元相互连姑、融合形成一层相对致密的薄层。据以上特征将其归为网形蛋科（Dictyoolithidae），网形蛋属（Dictyoolithus），定为一新种：公主岭网形蛋（Dictyoolithus gongzhulingensis oosp.nov）。公主岭网形蛋是网形蛋类化石在中国东北地区的首次发现，同时也是早白垩世地层中网形蛋化石新的发现。 相似文献
17.
西峡晚白垩世恐龙蛋化石宏观矿物组成研究及意义 总被引：7，自引：0，他引：7
发现于河南省西峡盆地的恐龙蛋化石群产于白垩纪末期的典型红色粘土地层,因此该化石本身可能包含着当时地史时期全球或区域环境灾变记录。利用显微镜观察恐龙蛋的表观特征;利用XRD和XRF研究发现蛋内外粘土的成分极其相似,进而推断西峡恐龙蛋化石蛋腔内的物质源于蛋腔外部;通过扫描电镜/能谱分析发现蛋壳表面存在裂纹现象,同时在蛋体内发现了针铁矿、铜锌氧化物、硫酸钡、氧化硅等颗粒,并对其形成和来源给出了适当的解释。并基于实验结果对K/E转折时期的环境灾变机理进行了初步探讨。 相似文献
18.
中国恐龙蛋化石及其生态地层浅析 总被引：2，自引：0，他引：2
文章系统地对中国恐龙蛋化石的地理分布作了总结,并将恐龙蛋化石类型归纳为９科,１３属,２１种。在此基础上,着重分析了恐龙蛋化石古生态特征,分别从蛋化石的排列方式,恐龙产蛋的方式,不同类型蛋化石间及蛋化石与骨骼化石共生几方面作了探讨,并进一步阐述恐龙蛋化石在晚白垩世地层划分对比所具有的直接指示意义 相似文献
19.
晚白垩世河道和冲积平原等河流相沉积广泛分布于中国大部分地区,保存了大量以鸭嘴龙超科为主的恐龙骨骼化石和遗迹化石。这些河流是否存在水系上的联系以及其对陆地生态系统分布的影响程度,目前研究较少。笔者收集了中国9个晚白垩世陆相盆地共2357个碎屑锆石的U-Pb年龄资料,通过对已收集的碎屑锆石的物源分析,探讨了中国晚白垩世的水系展布模式和物源方向。研究结果表明:晚白垩世中国南方地区可能存在北东—南西向的大型水系,其与现代水系展布模式相反,整体流向可能起源于晚中生代东部高原,向西和西南方向流经中国南方大部分地区,并形成了彼此相互交错、宽阔的河岸和冲积平原带;而北方地区的盆地则显示出被古隆起分隔的山间盆地特征,除共享来自晚中生代东部高原的少量物源外,各个盆地的物源主要来自于周围的古隆起,并形成了较为独立的复杂水系。以鸭嘴龙超科为代表的恐龙主要繁盛于北方地区相对独立的水系所形成的流域,演化出独特的东亚鸭嘴龙超科动物群。南方大型水系所形成的流域虽然保存了大量恐龙蛋和足迹化石,但仅发现少量骨骼化石,推测这可能是因为以鸭嘴龙为主的恐龙不适宜在南方炎热干旱的气候条件下常年生活,而只是在适宜的季节沿南方大型水系迁徙或繁殖。 相似文献