内蒙古土默特旗科达穗及种子化石研究

对发现于内蒙古土默特旗上石炭统一下二叠统的几种科达穗化石及种子类化石进行了研究,经鉴定确认其中有2个为新种,分别定名为长爪科达穗Cordaitanthuslongibracteatussp.nov.和多泡石籽Car polithusmultibullatussp.nov..这些珍贵的繁殖器官的发现,表明晚石炭世一早二叠世种子演化已达相当水平,对于研究科达类的演化过程具有重要的研究价值.     

NEW KNOWLEDGE OF WUTONG FORMATION DEPOSITION AT THE LOWER YANGTZE AREA

In the light of the plate tectonics the outline of paleogeography, sedimentary properties and facies patterns in the depositional processes of the Wutong Formation at the Lower Yangtze area are discussed. The argument that the Wutong Formation contains not only terrestrial sediments but also marine-terrestrial transitional or marine sediments is expounded to cover the development, evolution and paleoclimate of the Wutong depositional regions.     

Simple diffuse reflectance UV-vis spectroscopic determination of organic pigments (fringelites) in fossils

To screen for organic pigments, like fringelites or porphyrins, in sediments and fossil specimen, a simple diffuse reflectance UV-vis spectroscopic determination was developed. In contrast to common inorganic pigments, like Fe₂O₃, these pigments exhibit well-structured characteristic absorption peaks which allow their recognition. This method was then used to identify fringelite H in a non-crinoidSolenopora species from the Jurassic. Reflectance FTIR spectroscopy proved not to be useful for this purpose.     

Early Cambrian phosphatized blastula- and gastrula-stage animal fossils from southern Shaanxi

Marine invertebrate animal embryos and their early developmental products are of great significance to the study of taxonomy and phylogeny of early animals. A great number of phosphatized globular fossils were collected fromthe early Cambrian Kuanchuanpu Member (upper Dengying Formation), southern Shaanxi, and a nearly complete develo-pmental sequence—from a fertilized egg, via blastodisc formation, blastula development, blastodisc enlargement toward gastrulae, to tissue differentiation—can be discerned in this collection. This discovery provides unmatchable material for studies on the origin, taxonomy, radiation, and ontogeny of early metazoans.     

Early Cambrian protoconodonts and conodont-like fossils from China: Taxonomic revisions and stratigraphic implications

Tooth likephosphaticprotoconodontsand“con odont likefossils”arecharacteristiccomponentsoftheEarlyCambriansmallshellyfossils (SSF )withaworldwidedistribution .Theyarerepresentedexclu sivelybyisolatedscleritesandareoften presentinaceticacid etchedresiduesfromLowerCambriancar bonates .SincethefirstreportofProtohertzinaMis sarzhevsky 1973fromthebasalCambrianoftheYangtzePlatformin 1977[1] ,andalongwithenthusi asticresearchactivitiesonthesmallshellyfossilsandcandidatesectionsforaglobalPrecamb…     

湘西更新世哺乳动物化石痕迹考察研究

目的 考察湘西土家族苗族自治州古丈县断龙乡猛虎洞更新世哺乳动物群骨化石断裂痕迹的状态与原因,探索湘西地区古人类活动的遗迹.方法 观测哺乳动物群骨化石断裂痕迹剖面的形态结构,以区别食肉类动物群的咬痕与人类打造的印迹.结果 经40件东方剑齿象、中国犀、鹿等残骨化石标本断裂痕迹剖面的观测,发现有部分骨化石断裂剖面圆钝,似啮齿动物的咬痕,但大部分骨化石断端剖面呈锥形切削改造,有的双面削刮呈锐利器型,有的存在明显打击或铲刮的 “印记”,初步认为属早期人类制作骨器的遗迹.结论 结合地理环境和地学结构分析,猛虎洞可能属晚更新世(10～5)万年前旧石器人类穴居的营地或系同生代古脊椎动物的遗址.     

A new discovery of macroscopic fossils from the Ediacaran Doushantuo Formation in the Yangtze Gorges area

The Ediacaran section in the Yangtze Gorges area, South China, is one of the most important in the worldand contains abundant fossils[1-4]. The earliest discov- ery of macrofossils in 1984, including macroscopic algal fossils from the uppermost Doushantuo…     

山东肥城晚石炭世苔藓虫新知

通过对山东肥城矿区晚石炭世苔藓虫的进一步研究,又发现了以往在山东乃至华北未曾报道过的苔藓虫化,属隐口目中的两个科,计有两属六种,其中新种四个,近似种两个,进一步丰富了山东乃至华北石炭纪的苔藓虫化石资料。     

Lower Cambrian small shelly faunas from Zhejiang (China)and their biostratigraphical implications

Despite a long history of research on the Early Cambrian in China most available data on small skeletal fossils concern fossil associations of the shallow carbonate platform. Information on skeletal fossils from marginal shelf environments of the Yangtze Platform is scanty, which may reflect the rarity of fossils in deeper sedimentary environments but is also due to limitation of carbonate distribution and outcrops, difficulties in fossil extraction, and a general research focus on the Precambrian-Cambrian boundary beds on the carbonate platform. Here we present a documentation of Meishucunian to Qiongzhusian small skeletal fossils from the lower Hetang Formation and the chert unit at its base from the Jiangshan region, Zhejiang Province, representing a relatively deep shelf environment compared to the inner shelf region. The earliest association (Meishucunian) from the chert unit underlying the Hetang Formation is mainly characterized by the occurrence of Protohertzina anabarica, P. unguliformis, Fengzuella zhejiangensis, and Kaiyangites novilis, which differs somewhat in composition from SSF-associations of typical inner shelf deposits. The enigmatic skeletal fossil Fengzuella zhejiangensis, which exhibits an unusual secretional growth mode previously unrecognized from the Early Cambrian, is described in detail. A younger (Qiongzhusian) fossil association contains numerous arthropod remains, such as disarticulated spines of arthropods (Jiangshanodus- and Kijacus-type), which have previously been considered as conodont-like fossils, and bradoriid valves.