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A restudy of Oryctocephalus indicus (Reed,1910)

Progress in Natural Science:Materials International 2006年第11期16卷 1177-1182页

作者： ZHAO Yuanlong~1**, YUAN Jinliang~2, PENG Shanchi~ 2,3., YANG Xinglian~1, PENG Jin~1, LIN Jihpai~4, and GUO Qingjun~5(1. College of Resource and Environment of Guizhou University, Guiyang 550003. china 2. nanjing institute of geology and palaeontology, Chinese Academy of Sciences, nanjing 210008, china 3. state key laboratory of papaeobiology and stratigraphy, nanjing institute of geology and palaeontology, nanjing 210008, china 4. Department of Geological Science, Ohio state University, Columbus, OH 43.10, USA 5. institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, china) College of Resource and Environment of Guizhou University Guiyang 550003 China

Restudy on morphology of Oryctocephalus indicus (Reed, 1910), based on specimens from Guizhou, china and Nevada USA, suggests that the subspecies regarded previously as Oryctocephalus indicus indicus (Reed, 1910), O. indicus latus Zhao et Yuan 2002, and O. indicus kobayashi Saito, 193., are synonymous, and Oryctocephalus americanus Sundberg et McCollum, 2003.is a similar form of O. indicus. Oryctocephalus indicus is rediagnosed as having a glabella that is subconical in outline and tapering forward slightly; a thorax that comprises 12 segments, and a small pygidium that bears 2—3.axial rings with a terminal piece and a postaxial ridge. Oryctocephalus indicus is widely distributed in eastern Guizhou and ranges through a great interval of Kaili Formation. Its first appearance is almost identical with these events of trilobite extinction-recovery occurring at the end of the Early Cambrian, the alternation of acritach assemblages, the change of trace elements (REE) and stable isotopes (carbon) at the Wuliu-Zengjiaya section. As one of the key forms for defining the traditional Lower-Middle Cambrian boundary (the base of Cambrian Series 3.and Stage 5 in the new Cambrian chronstratigraphic standard), O. indicus has received detailed study and has more advantages than other species such as Ovatoryctocara granulata Tchernysheva, 1962 or Arthricocephalus chauveaui Bergeron, 1899.

关键词： Oryctocephalus indicus restudy Kaili Formation Cambrian Guizhou china.

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A neotype for Colpodexylon gracilentum Dou (Lycopsida) from the Middle Devonian of North Xinjiang,china

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Journal of Systematics and Evolution 2011年第4期49卷 372-378页

作者： Hong-He XU Yi WANG (state key laboratory of Palaeobiology and {3.,nanjing institute of geology and palaeontology,Chinese Academy of Sciences,nanjing 210008,china) ( state key laboratory of Palaeobiology and {3. Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China)

According to newly collected and well preserved specimens,herbaceous lycopsids Colpodexylon gracilentum Dou and Colpodexylon laminatum Dou from the late Middle Devonian of Xinjiang,NW china are reduced to ***,for which a neotype is designated and emended diagnosis is *** gracilentum has leaves with three nearly equal segments,an elliptical sporangium adaxially attached by a pad on the isomorphic sporophyll.

关键词： Colpodexylon Devonian lycopsid neotype Xinjiang.

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Early-Mid Ordovician brachiopod diversification in South china

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Science china Earth Sciences 2005年第5期48卷 662-675页

作者： ZHAN Renbin, RONG Jiayu, CHENG Jinhui & CHEN Pengfei nanjing institute of geology and palaeontology, Chinese Academy of Sciences state key {3. of Palaeobiology and stratigraphy, nanjing 210008, china nanjing institute of geology and {3. Chinese Academy of Sciences state key laboratory of Palaeobiology and {3. Nanjing China

Affected by paleogeographic position, paleoclimatic condition and depositional environments, the increase of the Early-Mid Ordovician brachiopod diversity of South china commenced at the beginning of the Ordovician (early Tremadoc), accelerated from the Tetra- graptus approximatus Biozone (base of Arenig), and reached its first acme in the Didymograptus eobifidus Biozone (mid early Arenig) when the number of brachiopod genera was over 7 times as great as that at the start of the Ordovician. This was the first radiation in the history of brachiopod macroevolution in South china, which occurred nearly 5 graptolitic biozones earlier than the global trend of the great Ordovician biodiversification (in the lower part of the Undulograptus austrodentatus Biozone). It is also characterized by (1) the origination or first occurrences of some major groups, such as the punctate dalmanelloids and the pseudopunctate stro- phomenoids including Plectambonitoidea (cardinal process simple or absent) and Stro- phomenoidea (cardinal process bilobed) in South china; (2) niche expansion, particularly in the first occupation of deeper water benthic regimes by the Euorthisina-Nocturnellia Association developed at Houping, Chengkou, northern Chongqing; and (3. the differentiation of brachiopod faunas under different environmental conditions. The gradual and increasing separation from Gondwana may have been one of the factors responsible for the radiation in South china.

关键词： biodiversity, evolutionary radiation, brachiopods, Early-Mid Ordovician, South china.

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Criteria for defining and recognizing the various orders of sequences in outcrop sequence stratigraphy

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Science china Earth Sciences 2004年第7期47卷 618-629页

作者： WANG Xunlian Faculty of Earth Sciences and Mineral Resources, china University of Geosciences, Beijing 100083. china state {3. laboratory of Palaeobiology and stratigraphy, nanjing institute of geology and palaeontology, Chinese Academy of Sciences, nanjing 210008, china Faculty of Earth Sciences and Mineral Resources China University of Geosciences Beijing China state key laboratory of Palaeobiology and {3. Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

The regional distribution in different depositional facies belts is here regarded as an important criterion for defining and recognizing the various orders of sequences. The third-order sequence is possibly global in nature, which may be discerned in different depositional facies belts in one continental margin and can be correlated over long distances, sometimes even worldwide. Commonly, correlation of subsequence (fourth-order sequence with time interval of 0.51.5 Ma) is difficult in different facies belts, although some of them may also be worldwide in distribution. A subsequence should be able to discern and correlate within at least one facies belt. The higher-order sequences, including microsequence (fifth-order sequence) and minisequence (sixth-order sequence), are regional or local in distribution. They may reflect the longer and shorter Milankovitch cycles respectively. Sequence and subsequence are usually recognizable in different facies belts, while microsequence and minisequence may be distinguished only in shallow marine deposits, but not in slope and basin facies deposits. A brief discussion is made on the essential conditions for correct identification of sequences, useful methods of study, and problems meriting special attention in outcrop sequence stratigraphy.

关键词： outcrop sequence stratigraphy, facies belt, sequence, subsequence, microsequence, minisequence, meter-scale cyclothem, Milankovitch cycle.

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REVIEW OF THE CLASSIFICATION OF THE FAMILY AFROGRAPTIDAE (CRUSTACEA: CONCHOSTRACA)

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古生物学报 2003年第4期 593-597页

作者： SHEN Yan Bin (nanjing institute of geology and {3., the Chinese Academy of Sciences state key laboratory of Palaeobiology and stratigraphy, nanjing 210008)

Serration structure on the growth lines of the fossil conchostracans was considered as a key character for the family Afragraptidae. SEM micrographs of some living forms indicate that there is a row of setae on the growth lines. Setal articulations of the growth lines are broken off while their insertions remain, which form an apparently serration margin along the growth lines for the fossil specimens in the external mold. The setae of the growth lines belong to annulate type without setules and probably played in sensory function. This structure was found from about 3. species in seven genera of three families for the living conchostracans and 22 fossil genera. Multi radiating costae and stout tubercles on the valves are much more important than that of serration structure in high taxonomic status for the family Afrograptidae. An emended scheme of the Afrograptidae is presented herein. This family can be better placed in the suborder Estherielliina, rather than in the Estheritina.

关键词： serration structure setae genesis taxonomy Family Afrograptidae Conchostraca Crustacea

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A Miocene Flora from Daotaiqiao Formation in Sifangtai Village,Huanan County,Heilongjiang Province,NE china with Palaeoclimatical and Palaeophytogeological Significance

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地学前缘 2009年第S1期16卷 257-258页

作者： Qing Jiang,Qin Leng state key laboratory of Palaeobiology and {3.,nanjing institute of geology and palaeontology,Chinese Academy of Sciences,nanjing 210008,china.

A Neogene biota was found from the yellowish green or dark gray clay of the Daotaiqiao Formation in gold placer mines in Sifangtai Village,Huanan County,Heilongjiang Province,NE china in the *** age was determined biostratigraphically to be late Middle Miocene to Late Miocene(most possibly Late Miocene) by vertebrate fossils and floral (including palynological) assemblage *** Miocene age(showing drastic global climate

关键词： megafossil plants Miocene Daotaiqiao Formation

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The developmental trend of labrum and median eyes of Orsten-type preserved Phosphatocopina (Crustacea)

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Science china Earth Sciences 2010年第1期53卷 18-26页

作者： LIU Zheng 1,2 & DONG XiPing 1,2 1 School of Earth and Space Sciences,Peking University,Beijing 100871,china 2 state key {3. of Palaeobiology and stratigraphy,nanjing institute of geology and palaeontology,Chinese Academy of Sciences,nanjing 210008,china School of Earth and Space Sciences Peking University Beijing China state key laboratory of Palaeobiology and {3. Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

The Phosphatocopina (Crustacea,Arthropoda) is an important group of 'Orsten-type' preserved *** is resolved as the sister-group of *** we study the labrum,the median eyes,and the inner lamella of Phosphatocopina based on the selected specimens respectively from western Hunan,South china,and *** labrum characters of different species exhibit interspecific *** ratio of labrum length/shield length is significant to the reconstruction of the ontogeny of *** labrum characters should be introduced to the diagnosis of *** the earliest growth stage,the median eyes were inconspicuous,almost as flat as the other area of the ***,with the growth of the individuals they became *** were two obviously concave structures on the ventral side of the hypostome in later stages,which were the positions where the median eyes should have been *** addition,the two modes of preservation of the inner lamella,i.e.,that of shrinking and that of bulging up,are interpreted as the preservational artifact herein.

关键词： Phosphatocopina Crustacea Orsten-type preservation morphology ontogeny Cambrian South china Sweden

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Two new species of Vestrogothia (Phosphatocopina, Crustacea) of Orsten-type preservation from the Upper Cambrian in western Hunan, South china

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Science china Earth Sciences 2009年第6期52卷 784-796页

作者： ZHANG HuaQiao1,2 & DONG XiPing1,2 1 School of Earth and Space Sciences,Peking University,Beijing 100871,china 2 state key {3. of Palaeobiology and stratigraphy,nanjing institute of geology and palaeontology,Chinese Academy of Sciences,nanjing 210008,china School of Earth and Space Sciences Peking University Beijing China state key laboratory of Palaeobiology and {3. Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

Although fossils of Orsten-type preservation represented by Skaracarida and Phosphatocopina were first reported from the Middle and Upper Cambrian in western Hunan, South china in 2005, diversified phosphatocopine species have never been appropriately described and elucidated in terms of their evolutionary relationships. Here, we described two new species of Phosphatocopina, Vestrogothia anterispinata sp. nov. and V. bispinata sp. nov. The evolutionary relationship among all the valid species of Phosphatocopina is discussed and the phylogeny of Phosphatocopina is reestablished using cladistic analysis. Accordingly, phosphatocopines primitively evolved along two lineages: one evolved towards the emergence of lobes; the other evolved towards the emergence of dorsal spines. Respectively, lobes originated independently three times, and dorsal spines originated only once. With regard to the dorsal rims, interdorsum originated first, whereas dorsal furrow originated independently twice on the basis of interdorsum. Probably Hesslandona may represent a polyphyletic group, whereas Vestrogothia a monophyletic group.

关键词： fossils of Orsten-type preservation Vestrogothia Phosphatocopina Crustacea evolution phylogeny Cambrian Hunan

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INTRODUCTION TO FOSSIL ALGAE AND STROMATOLITES

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微体古生物学报 2003年第1期 2-4页

作者： MU Xinan 1,2, YUAN Xunlai 1 1 nanjing institute of geology and palaeontology, Chinese Academy of Sciences, nanjing 2100082 state {3. laboratory of Palaeobiology and stratigraphy, nanjing 210008

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Palaeogene fossil Populus leaves from Lanzhou Basin and their palaeoclimatic significance

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Chinese Science Bulletin 2004年第14期49卷 1494-1501页

作者： SUN Bainian1,2, YAN Defei1, XIE Sanping1, CONG Peiyun1, XIN Cunlin1 & YUN Fei1 1. key laboratory of Western china抯 Environmental Systems of the Ministry of Education, Lanzhou University, Lanzhou 73.000, china 2. state key laboratory of Palaeobiology and stratigraphy, nanjing institute of geology and palaeontology, Chinese Academy of Sci-ences, nanjing 210008, china key laboratory of Western china''s Environmental Systems of the Ministry of Education Lanzhou University Lanzhou 730000 China state key laboratory of Palaeobiology and {3. Nanjing Institute of Geology and Palaeontolog Chinese Academy of Sci- ences Nanjing 210008 China

An angiosperm compression flora is found in Palaeogene from Lanzhou Basin and the cuticular analysis of Populus davidiana Dode in the flora is carefully made. Fur-thermore, the fossil cuticles are compared with the epidermal structures of extant Populus leaves growing in different en-vironments, i.e. moist, semimoist, and semiarid to arid cli-matic regions. The present experiments indicate that mature leaves of P. davidiana show leaf size from big to small, leaf cuticles from thick to thin and anticlinal walls of epidermal cells from faintness to clarity along with the increase of lati-tudes of the plant distributions, the climatic variation from moist to arid, the annual precipitation from more to less and the annual mean temperature from high to low. The fossil P. davidiana differs from the specimens collected from Shandan in semiarid to arid climatic regions but closely resembles the Wushan leaves in a semi-moist climatic area in a lot of fea-tures. In a word, the new research may reflect that the flora lives in a semi-moist climatic environment. The present dis-covery of compression of Paleogene Populus davidiana is of great significance to studying vegetation types, climatic and environmental changes during the primal uplifting of the Qinghai-Tibet Plateau.

关键词：古气候兰州盆地山杨化石角质层早第三纪被子植物

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