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河南西峡盆地恐龙蛋化石及埋藏特征 总被引：5，自引：0，他引：5
产于西峡盆地的恐龙蛋化石计有７ 科、８ 属、１０ 种以上, 主要分布于晚白垩世的高沟组和马家村组。其埋藏特征为： 含蛋层数多, 自下而上约２０ 层; 恐龙蛋大都为原地埋藏,成窝性好, 化石完整; 恐龙蛋集中区分布在冲积扇下、中部及洪泛平原内; 不同类型的恐龙蛋可在同一层面或上、下层中产出; 恐龙蛋在窝中的不同排列形式反映了恐龙产蛋的多样化;原地埋藏的恐龙蛋化石多产于一个正粒序层中、上部的细碎物中 相似文献
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河南省汝阳盆地白垩系的发现及意义 总被引：2，自引：0，他引：2
汝阳盆地是河南豫西地区的一个中—新生代盆地,地质学界把汝阳盆地九店组以上的一套碎屑岩系对比划分为古近系陈宅沟组、蟒川组、石台街组。2006年以来,在原划分的古近系蟒川组中发现了"汝阳巨型蜥脚类恐龙动物群",因此有必要对该套碎屑岩系进行重新认识。通过在该区进行的大比例尺地质填图和剖面测制,对采集的微体、无脊椎动物和脊椎动物化石鉴定及放射性同位素测年、稳定同位素、地球化学、岩石簿片等样品分析,认为分布于汝阳盆地中部(上店—刘店地区)的这套碎屑岩系的原"陈宅沟组、蟒川组"应改划为白垩系。本文新建白垩系下河东组、郝岭组、上东沟组来代表这一套含恐龙化石的碎屑岩系。 相似文献
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Yuong-Nam Lee 《Cretaceous Research》1997,18(6):849-864
The ichnofauna of the Woodbine Formation (Cenomanian), Denton County, Texas includes bird and dinosaur tracks. A new bird trackway,Magnoavipes loweiichnogen. et ichnosp. nov., appears to represent the largest bird tracks known from the Mesozoic. A theropod trackway,Fuscinapedis woodbinensisichnogen. et ichnosp. nov., is characterized by long digits of uniform width and pointed small claws. Six hadrosaurid trackways,Caririchnium protohadrosaurichnosichnosp. nov., are the oldest hadrosaurid tracks associated with skeletal elements. They include one isolated small footprint, a medium sized quadrupedal, and five large bipedal hadrosaurid trackways. 相似文献
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LAOJUMPON Chali SUTEETHORN Varavudh CHANTHASIT Phornphen LAUPRASERT Komsorn SUTEETHORN Suravech 《《地质学报》英文版》2017,91(4):1169-1178
The oldest dinosaur assemblages of Thailand deposit in continental sedimentary rocks of the Nam Phong Formation. Not only Isanosaurus attavipatchi was discovered but at least two more species of basal sauropods were found. A partial skeleton from Phu Hin Tan locality refers to sauropod taxon A. It is different from Isanosaurus and shares some characteristics with basal sauropods in the Early Jurassic. The sauropod taxon B was found in Non Sra Ard locality. Base on postcranial skeleton, sauropod taxon B shares some characteristics of the family Vulcanodontidae. Moreover, several fragments of the sauropods specimen are also found in Pha Khok Wang Yang and Phu Noi localities. All of the evidences above indicate that there are a highly diversity of sauropods in the Nam Phong Formation. At least three sauropod species (including Isanosaurus) were found in the Nam Phong formation. The issue about the age of the Nam Phong has been debated for a long time between the Triassic and Jurassic age. All of sauropodomorphs, in this study, are more likely the Early Jurassic period dinosaurs than the Triassic period dinosaurs. And they have deposited in the upper part of Nam Phong Formation. 相似文献
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In the tails of dromaeosaurid dinosaurs and rhamphorhynchid pterosaurs, elongate osteological rods extend anteriorly from the chevrons and the prezygapophyses. These caudal rods are positioned in parallel and are stacked dorsoventrally. The fully articulated and three-dimensionally preserved caudal series of some dromaeosaurid specimens show that individually these caudal rods were flexible, not rigid as previously thought. However, examination of the arrangement of the caudal rods in cross-section indicates that the combined effect of multiple caudal rods did provide substantial rigidity in the dorsoventral, but not in the lateral, plane. The results of digital muscle reconstructions confirm that dromaeosaurids and rhamphorhynchids also shared greatly reduced caudofemoral muscles in the anterior tail region. The striking similarities between the tails of dromaeosaurids and rhamphorhynchids suggest that both evolved under similar behavioral and biomechanical pressures. Combined with recent discoveries of primitive deinonychosaurs that phylogenetically bracket the evolution of dromaeosaurid caudal rods between two arboreal gliding/flying forms, these results are evidence that the unique caudal morphologies of dromaeosaurids and rhamphorhynchids were both adaptations for an aerial lifestyle. 相似文献
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列举并尝试对比了非洲早白垩世脊椎动物化石的主要产地。晚侏罗世(坦桑尼亚的敦达古鲁基默里奇期提塘期)至白垩纪最早期(南非的阿尔戈阿盆地凡兰吟期)的组合中含有剑龙、腕龙和梁龙,到前阿普特期(欧特里沃期巴列姆期?)被另一组合所取代。这一更年轻的组合中含有重爪龙亚科棘龙类、大头鳄类鳄鱼Sarcosuchus以及大型禽龙,它们主要来自尼日尔(ElRhaz组和喀麦隆(Koum组),部分来自利比亚(Cabao组)和突尼斯(Douiret组),后两组中还含有鲨鱼Priohybodus ar ambourgi。阿普特期(?)至早阿尔必期组合中仍含有禽龙,但是棘龙科棘龙类取代了重爪龙亚科。早塞诺曼期组合(Bahariya,Kem Kem)以恐龙Spinosaurus、Carcharodonto saurus,鲨鱼(Onchopris tisnumidus)和鳄鱼(利比亚鳄类、无棘腔鳄类)为特征。由此可知,中非的一些原先被认为是早白垩世的地层(坦桑尼亚的Galula组、马拉维的含恐龙层)为晚白垩世。脊椎动物化石在非洲陆相地层的对比中具有重要作用。 相似文献
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黑龙江北部嘉荫盆地中南部原划新近系时代的重新厘定 总被引：5，自引：0，他引：5
黑龙江省北部嘉荫盆地北端的黑龙江南岸渔亮子组是中国最早发现爬行类动物化石的层位,盛产恐龙化石.长期以来,盆地中南部的地层被划为古近系孙吴组.对乌拉嘎镇、庆林林场的孢粉研究显示,该地层的时代属晚白垩世晚期,相当于马斯科里赫特早期,可与黑龙江南岸嘉荫地区的渔亮子组对比.孢粉组合中含有大量耐干旱盐碱的克拉梭粉(Classopollis)、麻黄粉(Ephedripites),但未见前人在该地层中发现和报道的反映温暖潮湿气候环境的鹰粉(Aquilapollenites)和槐叶萍科(Ariadnaesporites)异孢.反映当时有一暂短的从温暖潮湿-干旱炎热的气候大变迁,这种变迁可能是造成恐龙大量死亡的原因之一. 相似文献
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New fossils of dinosaurs and pterosaurs have been found in the conglomeratic facies of the Maungataniwha Member of the Tahora Formation (Campanian) of New Zealand. These derive from a large theropod, a sauropod, an ankylosaur and a pterosaur. Together with previously described material they indicate at least five, maybe seven, taxa from the Late Cretaceous terrestrial fauna of New Zealand. At that time New Zealand was an island near Antarctica, so this represents an insular, polar fauna.We assume a vicariance model for the origin of this fauna, which probably samples that present in Antarctica at the time New Zealand rifted away from it. The fauna differs from other well known Cretaceous Gondwana faunas in including an ankylosaur, but is similar to that from the Late Early Cretaceous of Queensland, Australia. The inclusion of both an ankylosaur and sauropod lend a relict, Early Cretaceous aspect to the fauna. There seems to be no particular similarity to known polar faunas from the Early Cretaceous of Victoria, Australia, or the Late Cretaceous of Alaska and Antarctica.Dinosaurs, both large and small, were capable of surviving in the cool to cold-temperate, seasonal climate of New Zealand at this time. 相似文献
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广东河源盆地红层研究现状 总被引：1，自引：0，他引：1
近年来河源盆地的恐龙及蛋化石研究有突破性进展，在东源发现窃蛋龙类oviraptosaurs黄氏河源龙（Heyuannia huangi Lu）等恐龙化石，并收集到至少4属4种蛋化石一万余枚；含蛋层可以划分为上、下二层，下层以圆形蛋类及树枝蛋类大量富集为特征，上层以长形蛋为主。在盆地北部新发现了火山岩——弱熔结火山角砾岩，并新建立了适合本区的岩石地层单位系统——仙塘组、东源组、高埔岗组和莘庄村组，它们可与南雄、丹霞等盆地进行对比。 相似文献