Journal of Micropalaeontology最新文献_第10页

Improved wet splitter for micropalaeontological analysis, and assessment of uncertainty using data from splitters 用于微古生物学分析的改进湿分离器，以及使用分离器数据的不确定性评估

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-17 DOI: 10.5194/JM-37-191-2018

Laurie M. Charrieau, L. Bryngemark, Ingemar Hansson, H. Filipsson

引用次数: 3

A humid early Holocene in Yemen interpreted from palaeoecology and taxonomy of freshwater ostracods 从古生态学和淡水介形类分类解释也门早全新世湿润期

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-17 DOI: 10.5194/JM-37-167-2018

Munef Mohammed, P. Frenzel, D. Keyser, F. Hussain, Abdulkareem Abood, Abdulmajed Sha'af, Sadham Alzara'e, Sakher Alammari

引用次数: 2

The occurrence of a shallow-water Ammobaculoides assemblage in the Middle Jurassic (Bajocian) Dhruma Formation of Central Saudi Arabia 沙特阿拉伯中部中侏罗统(bajoian) Dhruma组浅水Ammobaculoides组合的产状

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-11 DOI: 10.5194/JM-37-149-2018

M. Kaminski, M. H. Malik, E. Setoyama

引用次数: 4

The functional significance of the spinose keel structure of benthic foraminifera: inferences from Miliolina cristata Millett, 1898 (Miliolida) from northeast Romania 底栖有孔虫棘骨结构的功能意义:来自罗马尼亚东北部mililolina cristata Millett, 1898 (mililida)的推论

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-11 DOI: 10.5194/JM-37-153-2018

S. Dumitriu, Zofia Dubicka, Viorel Ionesi

{"title":"The functional significance of the spinose keel structure of benthic foraminifera: inferences from Miliolina cristata Millett, 1898 (Miliolida) from northeast Romania","authors":"S. Dumitriu, Zofia Dubicka, Viorel Ionesi","doi":"10.5194/JM-37-153-2018","DOIUrl":"https://doi.org/10.5194/JM-37-153-2018","url":null,"abstract":"Abstract. The paper presents Miocene (lower Sarmatian) benthic foraminifera from the\u0000FH 3 P 1 Rădăuţi Core section from the northwestern part\u0000of the Moldavian Platform, Romania. Based on foraminiferal assemblages we\u0000infer sediments were deposited in shallow-water, including marine-marginal\u0000environments, of varying salinities from brackish to normal marine with some\u0000short and rather small sea-level changes. Moreover, we describe for the first\u0000time in the Moldavian Platform a very rare species, Miliolina cristata Millett, which presents a characteristic spinose keel. Based on a\u0000detailed study of the test morphology and its variability, observed in picked\u0000material as well as in thin sections, we discuss some palaeoecological\u0000aspects of these foraminifera. M. cristata probably does not\u0000constitute a distinctive species, but it is more probable that some miliolid\u0000taxa developed such an exoskeletal feature in response to new environmental\u0000conditions, such as more turbulent water. Accordingly, our study would\u0000support the thesis that one of the functions of the benthic foraminiferal\u0000spines is to stabilize foraminiferal tests found in sandy substrates from\u0000high-energy environments.","PeriodicalId":54786,"journal":{"name":"Journal of Micropalaeontology","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2018-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47855618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Additional new organic-walled dinoflagellate cysts from two onshore UK Chalk boreholes 英国Chalk两个陆上钻孔中的其他新的有机壁甲藻囊肿

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-05 DOI: 10.5194/JM-37-73-2018

M. Pearce

引用次数: 5

Stratigraphic calibration of Oligocene–Miocene organic-walled dinoflagellate cysts from offshore Wilkes Land, East Antarctica, and a zonation proposal 南极洲东部威尔克斯岛近海渐新世-中新世有机壁甲藻囊肿的地层校准和分带建议

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-05 DOI: 10.5194/JM-37-105-2018

P. Bijl, A. Houben, A.M.J. Bruls, J. Pross, F. Sangiorgi

{"title":"Stratigraphic calibration of Oligocene–Miocene organic-walled dinoflagellate cysts from offshore Wilkes Land, East Antarctica, and a zonation proposal","authors":"P. Bijl, A. Houben, A.M.J. Bruls, J. Pross, F. Sangiorgi","doi":"10.5194/JM-37-105-2018","DOIUrl":"https://doi.org/10.5194/JM-37-105-2018","url":null,"abstract":"Abstract. There is growing interest in the scientific community in reconstructing the paleoceanography of the Southern Ocean during the Oligocene–Miocene because these time intervals experienced atmospheric CO2 concentrations with relevance to our future. However, it has remained notoriously difficult to put the sedimentary archives used in these efforts into a temporal framework. This is at least partially due to the fact that the bio-events recorded in organic-walled dinoflagellate cysts (dinocysts), which often represent the only microfossil group preserved, have not yet been calibrated to the international timescale. Here we present dinocyst ranges from Oligocene–Miocene sediments drilled offshore the Wilkes Land continental margin, East Antarctica (Integrated Ocean Drilling Program (IODP) Hole U1356A). In addition, we apply statistical means to test a priori assumptions about whether the recorded taxa were deposited in situ or were reworked from older strata. Moreover, we describe two new dinocyst species, Selenopemphix brinkhuisii sp. nov. and Lejeunecysta adeliensis sp. nov., which are identified as important markers for regional stratigraphic analysis. Finally, we calibrate all identified dinocyst events to the international timescale using independent age control from calcareous nanoplankton and magnetostratigraphy from IODP Hole U1356A, and we propose a provisional dinoflagellate cyst zonation scheme for the Oligocene–Miocene of the Southern Ocean.","PeriodicalId":54786,"journal":{"name":"Journal of Micropalaeontology","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2018-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43451963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 39

Reconstruction of the multielement apparatus of Neogondolella ex gr. regalis Mosher, 1970 (Conodonta) from the Anisian (Middle Triassic) in British Columbia, Canada 加拿大不列颠哥伦比亚省安尼西亚(中三叠世)Neogondolella ex gr. regalis Mosher, 1970 (Conodonta)多元素仪器的重建

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-05 DOI: 10.5194/JM-37-21-2018

M. Golding

引用次数: 8

Fetchamium prolixispinosum gen. et comb. nov. (division Dinoflagellata) 毛缕草。11月(鞭毛纲)

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-05 DOI: 10.5194/JM-37-17-2018

Martin A. Pearce, Graham L. Williams

引用次数: 3

Cold-seep ostracods from the western Svalbard margin: direct palaeo-indicator for methane seepage? 斯瓦尔巴群岛西部边缘的冷渗介形类:甲烷渗漏的直接古指示物?

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-05 DOI: 10.5194/JM-37-139-2018

M. Yasuhara, Kamila Sztybor, T. L. Rasmussen, Hisayo Okahashi, Runa Sato, H. Tanaka

引用次数: 7

A deep-sea agglutinated foraminifer tube constructed with planktonic foraminifer shells of a single species 一种由单一物种的浮游有孔虫外壳构建的深海粘性有孔虫管

IF 2 3区地球科学

Journal of Micropalaeontology Pub Date : 2018-01-05 DOI: 10.5194/JM-37-97-2018

P. Pearson, Iodp Expedition Shipboard ScientificParty

{"title":"A deep-sea agglutinated foraminifer tube constructed with planktonic foraminifer shells of a single species","authors":"P. Pearson, Iodp Expedition Shipboard ScientificParty","doi":"10.5194/JM-37-97-2018","DOIUrl":"https://doi.org/10.5194/JM-37-97-2018","url":null,"abstract":"Abstract. Agglutinated foraminifera are marine protists that show apparently complex\u0000behaviour in constructing their shells, involving selecting suitable\u0000sedimentary grains from their environment, manipulating them in three\u0000dimensions, and cementing them precisely into position. Here we illustrate a\u0000striking and previously undescribed example of complex organisation in\u0000fragments of a tube-like foraminifer (questionably assigned to\u0000Rhabdammina) from 1466 m water depth on the northwest Australian\u0000margin. The tube is constructed from well-cemented siliciclastic grains which\u0000form a matrix into which hundreds of planktonic foraminifer shells are\u0000regularly spaced in apparently helical bands. These shells are of a single\u0000species, Turborotalita clarkei, which has been selected to the\u0000exclusion of all other bioclasts. The majority of shells are set horizontally\u0000in the matrix with the umbilical side upward. This mode of construction, as\u0000is the case with other agglutinated tests, seems to\u0000require either an extraordinarily\u0000selective trial-and-error process at the site of cementation or an active\u0000sensory and decision-making system within the cell.","PeriodicalId":54786,"journal":{"name":"Journal of Micropalaeontology","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2018-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48140363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3