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1.
LI Ruiyun WANG Xuelian JIN Peihong MA Fujun YAN Defei LIN Zhicheng SUN Bainian 《《地质学报》英文版》2016,90(3):838-846
A new genus and species, Rebouliothallus huolinhensis sp. nov., and two uncertain species, Ricciopsis sp. and Hepaticites sp., are described. The fossils were collected from the Lower Cretaceous Huolinhe Formation of Huolinhe Basin, northeastern China. The new genus Rebouliothallus was established in the Aytoniaceae family of Marchantiales. Rebouliothallus huolinhensis appears to be quite similar to species of the extant genus Reboulia Raddi. The species is characterized by the relatively large ventral scales. Ventral scales are large, imbricate and arranged in two rows on the ventral surface. Rhizoids are either pegged or smooth. Ricciopsis sp. is characterized by the rosette-forming thallus. Hepaticites sp. shows some similarities to liverworts. Of the forty-nine Early Cretaceous floras of China, only two floras, one from the Huolinhe basin, Inner Mongolia and the other from the Jixi Basin, Heilongjiang Province, contain fossil liverworts. The rare fossil liverwort records in the Early Cretaceous floras of China may be the result of taphonomic bias. 相似文献
2.
中国甘肃发现世界上最大牙齿的植食性恐龙:巨齿兰州龙(新属、新种) 总被引：4，自引：0，他引：4
巨齿兰州龙（新属、新种）是发现于中国甘肃省兰州盆地早白垩世地层中的一新鸟脚类恐龙，其牙齿是世界上已知植食性恐龙中最大的。兰州龙下颌长1m，每侧有14个齿槽，而单个牙齿宽约4cm，这是已知恐龙中的首次报道。分支系统学分析发现巨齿兰州龙与非洲早白垩世Lurdusaurus arenatus关系密切。它们代表了鸟脚类恐龙进化中四足行走的笨重的一新支。兰州龙的发现也表明欧亚大陆与非洲在早白垩世具有较密切的联系。 相似文献
3.
兰州—民和盆地位于中国西北横跨甘肃和青海两省的毗连地区,其中广泛发育出露良好下白垩统河口群。近年来,在该盆地东部的兰州盆地产出了一个前所未知的脊椎动物组合,其中以诸多的足印化石和世界已知最大牙齿的植食性恐龙——巨齿兰州龙(Lanzhousaurus magnidens)为代表,还包括一类宽臀的基干巨龙型类蜥脚类——刘家峡黄河巨龙(Huanghetitan liujiaxiaensis),以及许多其他尚未发表的恐龙、鱼类和龟类。本文报道在该地区河口群中所发现的第二种新的蜥脚类恐龙——炳灵大夏巨龙(新属新种)(Daxiatitan binglingi gen.et sp.nov.)。炳灵大夏巨龙的正型标本现存于甘肃省地矿局第三地质矿产勘查院古生物研究开发中心(兰州)。该标本包括最后的10枚颈椎,10枚背椎,2枚近端尾椎,部分颈肋和背肋,1枚脉弓,右肩胛骨,右乌喙骨和右股骨。估计其颈部长度为12.2m,整个身体长度为26m,使其成为中国乃至亚洲最大的恐龙之一。大夏巨龙是巨龙类的一个基干分子[其支干定义为:与盐龙(Saltasaurus)而不与腕龙(Brachiosaurus)更具亲缘关系的巨龙型类],其以如下特征区别于其他巨龙类分子:颈椎的前关节面后移;肩胛骨骨体的远缘与其长轴斜交;股骨远端髁相对于股骨体向背侧方倾斜10°,而且从远端看,该远端髁处于后内—前侧方向。大夏巨龙独特的股骨构造指示出一种强烈外撇的走步姿态。同时,这种姿态也得到了保存于刘家峡恐龙国家地质公园同一层位(河口群上段)的强烈外转的、宽间距的蜥脚类恐龙行迹的进一步佐证。炳灵大夏巨龙的发现丰富了兰州盆地脊椎动物组合,对研究巨龙类恐龙的起源和早期演化具有重要意义。 相似文献
4.
In this paper one new genus and three new species Bellimordella capitulifera gen. et sp. nov., B. longispina gen. et sp. nov., B. robusta gen. et sp. nov., all placed within the subfamily Praemordellinae of the family Mordellidae, are described and illustrated. The specimens were recovered from the Yixian Formation of Beipiao City, Liaoning Province, NE China. The key to the species of this new genus is given. Furthermore, we discuss evolution of the pygidium and possible food for those ancient mordellids. 相似文献
5.
TAN Jingjing REN Dong SHIH Chungkun GE Siqin 《《地质学报》英文版》2006,80(4):474-485
A new genus with one new species and five new species of genus Amblomma of fossil ommatids are described and illustrated： Euryomma tylodes gen. et sp. nov., Amblomma cyclodonta sp. nov., Amblomma miniscula sp. nov., Amblomma porrecta sp. nov., Amblomma eumeura sp. nov., and Amblomma protensa sp. nov. All of them were collected from the Upper Jurassic or Lower Cretaceous Yixian Formation of western Liaoning, China. A key to the species of Amblomma is given. The wide epipleural space shows that Euryomma may be a primitive genus in Ommatidae. Many different species of Amblomma occurred within the same sedimentary horizon in this area could be environmental changes caused by frequent volcanic activities during the deposition of the Yixian Formation. 相似文献
6.
迄今得到世界公认的、证据确凿的有翅亚纲昆虫化石发现于晚石炭世纳缪尔期(Namurian
stage).在这个时期爆发出大量且多样性的昆虫群,形成地史中第1个繁盛期.在这种地质背景下,中国祁连山地区也爆发出迄今第1个最古老的昆虫群,命名为祁连山昆虫群(Qilianshan
Entomofauna)(属祁连山动物群,也是祁连山生物群中的一个门类).中国祁连山昆虫群发现于宁夏中卫县晚石炭世纳缪尔期中-薄层黑色页岩、炭质页岩之中.中卫县地处宁夏中部,(中)卫(中)宁平原的西侧.化石产于中卫县城西南20km处的下河沿村,北邻黄河,南依香山,地理坐标为东经105°05′、北纬37°25′,行政区划隶属于中卫县常乐镇.中国祁连山纳缪尔期昆虫的发现与研究,使笔者有机会对这一时期昆虫群的面貌、性质和演化关系,以及产地和层位的分布有了较全面的认识.本区昆虫既有全球纳缪尔期昆虫面貌的一般色彩,又有本区昆虫独特之处,不但有别于欧美的纳缪尔期昆虫,也与中国晚石炭世本溪组和二叠纪山西组、石盒子组昆虫面貌迥然不同.经过详细研究,确立了中国祁连山纳缪尔期的昆虫群--祁连山昆虫群,以宁夏中国纳缪尔翅蛉-石炭祁连山翅蛉-下河沿拟原襀翅蛉(Sinonamuropteris
ningxiaensis-Qilian-shanopteris carbonica-Protoplecopsis xiaheyanensis)为代表,反映本区昆虫的特色.自1990年在宁夏中卫县常乐镇采集到纳缪尔期昆虫化石之后又连续进行了7年的采集,至21世纪初,笔者等又深入该地区再次进行采集,前后历经9年的化石采集工作,采获论文摘要曾在1995年第18届国际太平洋了大量且部分保存完好的标本,是昆虫分类与演化系统研究不可多得的新材料.阶段性科学大会古昆虫学分会上宣读,并于1998年建立了祁连山昆虫群,正式向世人公布了这一重要昆虫群的发现,其意义如下.(1)开拓了中国纳缪尔期昆虫的研究领域,从而填补了中国这个时代昆虫的空白.(2)开辟了中国早期昆虫的研究,逐步将中国中生代昆虫的研究,尤其是中三叠世昆虫的研究,向古生代晚期石炭纪-二叠纪昆虫延伸,加深了对古生代晚期至中生代早期这一最关键时期古翅类、新翅类昆虫的死与生、老与新的演替发展过程和不同类群特色的了解、认识,进而有助于探索昆虫的系统演化关系.(3)有翅昆虫翅的发生与发展是国际上2个多世纪以来未完全解决的重大问题之一.由于有翅昆虫在纳缪尔期首次爆发出大量多样性的类群,形成第1个繁盛期,基本上奠定了古生代晚期各个绝灭目和衍生目的基础.以祁连山昆虫群的标本为基础,展开以分类学、系统发育为核心的研究,必将有利于对有翅昆虫翅的发生与发展的探讨和研究.(4)从古昆虫区系来看,祁连山昆虫群不但是中国,也是东亚地史上出现的第1个昆虫群.这个昆虫群由于自身的独特性质而形成自身的区系,在古昆虫区系划分上占有一定的重要位置.(5)从地层划分、对比和时代确定来看,由于祁连山昆虫群各类群的独特性,均为本区特有的昆虫,层位清楚,时代确切,为地层划分、对比和地质时代的确定提供了可靠的根据.(6)祁连山昆虫群是在海陆交互相沉积环境中形成的,它的发现拓宽了寻找昆虫化石的新领域.过去通常在纯陆相的湖泊相、沼泽相和河湖相沉积层中寻找昆虫化石,祁连山昆虫群的发现表明,不但在陆相地层中可以找到昆虫化石,在海陆交互相沉积地层中也可以找到昆虫等陆生动物化石.在实践中可以了解到,海陆交互地区的水量充足,气候潮湿,植被茂盛,有利于昆虫的生存和发展.居多发生在食料来源充足的亚热带-热带原始森林之中的昆虫及其他陆生动物,随着这种良好的自然生态环境而迅速繁殖、发展,使动、植物与大自然形成一系列协同进化的良性的自然生态环境,也为化石的保存提供了良好的地质条件.祁连山纳缪尔期海陆交互相地层所保存的昆虫就是拓宽思路、寻找昆虫化石的一个实例.本文在对翅脉结构和性质进行深入研究和系统分类的基础上,进一步探讨了中国纳缪尔翅蛉科在地史中的演化规律,将该科的演化分为4个阶段原始阶段(离脉时期)、早期阶段(联脉时期)、过渡阶段(触脉时期)和特化阶段(并脉时期).这一演化规律的总结和提出,是昆虫脉序研究的一次突破性进展.文中对祁连山地区产出的数量庞大的中国纳缪尔翅蛉科进行了系统的分类和描述.此次因篇幅所限,仅发表1个新科,包括4个新属、3个新亚属和9个新种. 相似文献
7.
《Australian Journal of Earth Sciences》2013,60(5):701-741
The Late Oligocene Kangaroo Well Local Fauna from the Ulta Limestone (new name), northwestern Lake Eyre Basin correlates best with vertebrate assemblages from the Etadunna, Namba and Wipajiri Formations of the central Lake Eyre Basin, and from the Carl Creek Limestone (Karumba Basin) of northwestern Queensland. The biochronologically informative marsupials, Neohelos tirarensis (Diprotodontidae, Zygomaturinae), Marlu sp. cf. M. kutjamarpensis and Pildra sp. cf. P.magnus (Pseudocheiridae), and Ektopodon ulta sp. nov. (Ektopodontidae), indicate that the Kangaroo Well Local Fauna may be slightly older than the Kutjamarpu Local Fauna (Wipajiri Formation) and slightly younger than the Ngama Local Fauna (zone D of the Etadunna Formation) of Late Oligocene age. A new species of primitive ?Wynyardiidae, Ayekaye jaredi sp. nov., is described, and the nomenclature of two extinct gastropods, Glyptophysa rodingae (McMichael) and Cupedora Iloydi (McMichael) (new combinations), the type localities of which are in the Ulta Limestone, is revised in line with current taxonomy. The Ulta Limestone, an alluvial calclithite composed primarily of caliche fabrics, and its correlatives were deposited during the Miocene oscillation climatic event. Palaeoclimatic modelling using sedimentological data, crocodilians and extant analogs of fossil terrestrial gastropods indicates that the average annual temperature at Kangaroo Well during the Late Oligocene was probably between 14 and 20°C, while mean annual rainfall was probably <600 mm. Similar associations from central parts of the Lake Eyre Basin, from Riversleigh, northwestern Queensland, and from Bullock Creek, north‐central Northern Territory, indicate that such conditions were widespread during depositional phases of the Miocene oscillation. Palaeoclimatic indicators do not support the presence of widespread closed forests in northwestern Queensland and across the inland of the Northern Territory and South Australia during the Miocene oscillation. 相似文献
8.
热河生物群中蜘蛛和蟹奴化石几个新种 总被引：1，自引：0，他引：1
由于蜘蛛身体表面所覆盖的体壳较薄，通常保存为化石的几率较小，因此，蜘蛛化石是一类较为稀有的化石。热河生物群中的蜘蛛化石迄今尚未进行过系统描述。本文报道了属于Araneidae Leach，1819(园蛛科)、Gnaphosidae(平腹蛛科)和Theidiidae Sundeva1833(球腹蛛科)6个蜘蛛新种：Araneus liaoxiensis sp．nov．，A．aethus p．nov．，A．reheensissp．nov．，A．beipiaoensis sp，nov．，Gtuzphosq liaoningensiss p．nov．和Theridion atalus sp．nov．；以及蟹奴幼虫的一个化石新属种Mesosacculina papposa gen．etsp．nov．。这些化石均采自辽西北票黄半吉沟义县组下部(晚侏罗世-早白垩世)。 相似文献
9.
Our results present a taxonomic and palaeoecological study on non-marine gastropods from the latest Cretaceous to Paleocene deposits of the Pingyi Basin, Shandong Province, eastern China. These gastropods are systematically described: three species belonging to three genera including Physa dongtaiensis Gu, 1989, Hydrobia datangensis Yü, 1977, and the newly established species Cyathopoma pingyiensis sp. nov.; two indeterminata genera and species including Truncatelloidea gen. et sp. indet., and Pomatiopsidae gen. et sp. indet. Among them, Truncatelloidea gen. et sp. indet. and Cyathopoma pingyiensis sp. nov. are the dominant species with the longest record. Cyathopoma pingyiensis, sp. nov. is the earliest representative of this widely distributed Asian extant genus. Sedimentological facies analysis of the gastropod-bearing beds suggested that Truncatelloidea gen. et sp. indet. lived in a small pond with a river inlet and a shallow lake, while Ph. dongtaiensis, ?Pomatiopsidae gen. et sp. indet, and ?H. datangensis only thrived in the shallow lake. Cyathopoma pingyiensis sp. nov. inhabited the land area around the shallow lake. Our results showed that no significant species change of the gastropod fauna across the K/Pg (Cretaceous/Paleogene) boundary was observed in the Pingyi Basin. 相似文献
10.
《Journal of South American Earth Sciences》2000,13(7):685-692
In this paper the first Oligocene conchostracans are described from the Tremembé Formation (Taubaté Basin) of Brazil, these are also the first known Oligocene conchostracans in the world. References to a few other Cenozoic conchostracan discoveries are also discussed. Tremembeglypta saadi nov. gen. et sp. is compared with different members of the family Loxomegaglyptidae, specifically with Paraleptestheria menglaensis Chen, the only member of the family described from the Lower Tertiary of China. Paleobiological and environmental comments about conchostracans and their associated fish fauna are included. Finally, the importance and implication of this find are briefly discussed. 相似文献
11.
MA Fujun WANG Qiujun DONG Junling YANG Yi WANG Wenji YAN Defei SUN Bainian 《《地质学报》英文版》2015,89(5):1453-1469
The present paper reports two new species of Buxus from the Oligocene Ningming Formation of Guangxi, South China, on the basis of several compressed fossil leaves. Buxus ningmingensis sp. nov. is characterized by an elliptic to ovate shape; pinnate venation with marginal secondary, long hairs on the adaxial side of the midvein base; and amphistomatic, anomocytic stomata with a prominent outer ring. All of these characteristics suggest a closest af?nity to the living Buxus microphylla subsp. sinica. Another new species identi?ed as Buxus preaustro-yunnanensis sp. nov. is characterized by the diagnostic formation of its admedially branched tertiaries, the trunks of which are often strongly thickened by sclereides. This species is most similar to the extant Buxus austro-yunnanensis. The co-occurrence of Buxus ningmingensis sp. nov. and Buxus preaustro-yunnanensis sp. nov. suggests that these two Buxus lived during the Oligocene under a warm, tropical to subtropical climate, similar to the current climate of Ningming. Our ?ndings provide the earliest fossil evidence of Buxus leaves with detailed illustrations of leaf architectural and cuticular features. The occurrence of these two species indicates that Buxus began to diversify in Guangxi no later than the Oligocene. 相似文献
12.
我国中生代始水虻科昆虫多样性非常丰富,本文新记录了来自内蒙古宁城道虎沟中侏罗世地层莎水虻属 Sharasargus 下的两个新种：长脉莎水虻 Sharasargus longivenus Wang, Feng et Wang, sp. nov. 和道虎沟莎水虻 Sharasargus daohugouensis Wang, Feng et Wang, sp. nov. 。其中,长脉莎水虻具有较长的Rs和bM1+2与其他种明显分开,而道虎沟莎水虻的R5明显延长与其他种明显区分;此外,本文还编制了莎水虻属分种检索表。 相似文献
13.
TAN Jingjing HUANG Diying REN Dong 《《地质学报》英文版》2007,81(5):688-696
Three new fossil species of the genus Mesocupes of fossil cupedids,M.angustilabialis sp. nov.,M.latilabialis sp.nov.and M.collaris sp.nov.,are described from the Jiulongshan Formation of Inner Mongolia,China.These new species are the first three records of fossil Mesocupes in China as well as the oldest ones in the world now.This finding also extends the geographical distribution of this genus from Central to East Asia.In addition,based on the ratio of the length of the last to the penultimate abdominal ventrites of new beetles distinctly lower than that of the species from the Karabastau Formation,the age of Daohugou fossil-bearing beds might be older than that of Karatau assemblage and consequently of Middle Jurassic. 相似文献
14.
Here, we describe a new primitive Erinaceidae species, Oligoechinus lanzhouensis n. gen. n. sp., based on a specimen from late Oligocene strata of the Lanzhou Basin, Gansu Province. Its characteristics are as follows: the M1 width is longer than the length, the metastyle extends far disto-labially, the posterior margin has strong curve and a distinct metaconule that is connected to the protocone by a postprotocrista is located in the centre of the tooth. The posterior arm of the metaconule is poorly developed. In the P4, the pterion of the metastyle is less developed and the metacone is carinate. In addition, O. lanzhouensis has a premolar larger than the canine tooth (P2 > C) and P3 had no molarisation, characters also possessed by Erinaceus. Overall, O. lanzhouensis was similar to Mioechinus based on architectural tooth features, demonstrating a closed genetic relationship. Fossil Erinaceidae are relatively rare before the Miocene. The discovery of O. lanzhouensis provides an important insight into the origin of Mioechinus in China and the early evolution of the Erinaceidae. Our analysis shows that a relatively recent ancestor of Mioechinus had probably existed in the early Oligocene and that O. Lanzhouensis was likely an ancestral type of Mioechinus gobiensis, and its systematic position should be located at a transitional position between Amphechinus and Mioechinus. 相似文献
15.
The fossil snakefly family Baissopteridae from the Lower Cretaceous (upper Barremian) of the Yixian Formation of Liaoning Province, China is reviewed. Two genera and five species of Baissopteridae are recorded, including a new genus, namely Microbaissoptera gen. nov., and three new species, i.e., Baissoptera bicolor sp. nov., Baissoptera sinica sp. nov., and Microbaissoptera monosticha sp. nov. Moreover, Baissoptera euneura Ren, 1997 is herein treated as a new junior synonymy of Baissoptera grandis Ren in Ren et al., 1995. Baissoptera minima Ponomarenko, 1993 is transferred to the presently described new genus Microbaissoptera gen. nov. based on the small body-size and the presence of a single gradate series of crossveins in radial and medial areas of posterior part of both fore- and hind wings. A key to genera of Baissopteridae is provided. 相似文献
16.
兰州盆地永登剖面记录的第三纪沉积环境 总被引：1，自引：0，他引：1
对兰州盆地永登剖面第三系沉积进行了沉积学研究、并结合年代学研究结果分析了新生代以来沉积环境变化与气候变化.古新世末至早始新世沉积了一套扇三角洲相沉积(细柳沟组),为具交错层理的砖红色砂岩,顶界年龄约51 Ma.兰州地区在51 MaB.P.经历了一次大的环境变化,气候由相对温暖湿润转为半干旱半湿润,气候炎热,湖盆由淡水湖转为盐湖,蕴示着由副热带高压控制的干旱带北移,兰州地区进入受行星风系控制的干旱带.早始新世晚期至早渐新世早期(51～31.5 Ma B.P.),在近20 Ma时间内经历了微咸湖-盐湖阶段(野狐城组),砂泥岩沉积中含有大量石膏夹层.早渐新世,兰州地区向湿润方向转化,兰州盆地由咸水湖转化为淡水湖,可能反映了东南季风逐渐形成,中国大陆由早先行星风系控制转化为季风控制,前期东南方向干旱带消失,西北干旱带出现,兰州地区相对早先湿润.早渐新世中期至中中新世(31.5～15 Ma B.P.),兰州盆地在经历了三次大的沉积旋回后湖盆逐渐干枯,三个大旋回分别由河流相砂岩-微咸水滨湖相砂泥岩、泛滥平原相泥岩,河流相砂岩-淡水滨湖相砂泥岩-沼泽相、泛滥平原相泥岩,河流相砂岩-沼泽相、泛滥平原相泥岩组成.20 MaB.P盆地接受大量砂砾石沉积,反映出周缘山体快速抬升遭受剥蚀,可能蕴示着青藏高原抬升波及到兰州地区. 相似文献
17.
Three new species of the extinct genus of Eoptychopterina from the Eoptychopteridae family, Eoptychopterina antica sp. nov., Eoptychopterina adnexa sp. nov., and Eoptychopterina mediata sp. nov., are described and illustrated. These three new species are established based on fossil specimens with bodies and complete wings. All were collected from the Middle Jurassic Jiulongshan Formation of Daohugou in eastern Inner Mongolia, China. Based on the new materials, the name of two species in Eoptychopterina from China--Eoptychopterina elenae Ren and Krzeminski and Eoptychopterina gigantea Zhang--is sysnonymum junius. 相似文献
18.
：Yumushan
block on the north margin of Qilian mountain, with Jiudong basin and Minle basin to the
west and east respectively, belongs to the fore-land depression in NNW direction at the
north margin of the Qilian mountain fold belt. The Yumushan block has been thought of as a
fault-uplift, which separates the two basins formed during late Yanshanian orogeny.
However, the recognition of fault zones at the western margin of the Yumushan block, and
the tectonic and sedimentary analyses of the Yumushan block and the basins, cast doubts to
the tectonic property of the block. It is suggested that the two basins be derived from an
united large basin at least during Mesozoic and the Yumushan block be nappe sheet formed
due to NE imbricate thrusting on the north margin fault zone of the Qilian mountain. This
proposal would provide valuable clues to further exploration of oil-gas and water
resources in Hexi corridor basin belt. 相似文献
19.
Four new genera and five new species of Archegocimicidae are described from the Lower Cretaceous of England: namely Mortalia martini gen. et sp. nov., Tyrion lannister gen. et sp. nov., T. cersei sp. nov., Stannis baratheon gen et sp. nov., Daenerys khaleesi gen. et sp. nov. A transitional position of the complex between Asian Late Jurassic and Early Cretaceous entomofaunas is indicated by this new material. 相似文献