Micropaleontology最新文献_第7页

Oxfordian Benthic Foraminifera and Ostracods from the Hanifa Formation (Hawtah Member), Central Saudi Arabia 沙特阿拉伯中部哈尼法组(Hawtah组)牛津底栖有孔虫和介形类

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2021-01-01 DOI: 10.47894/mpal.67.6.04

Saleh S. Aba Alkhayl

引用次数: 2

Ypresian Alveolina and calcareous nannofossils from the south Sabzevar area (Central Iran): biostratigraphic, taxonomic and paleobiogeographic implications 伊朗中部Sabzevar地区南部的伊朗牙槽藻和钙质纳米化石:生物地层、分类和古生物地理意义

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2021-01-01 DOI: 10.47894/mpal.67.1.04

M. Hadi, L. Consorti, M. Vahidinia, M. Parandavar, Marziyeh Zoraghi

引用次数: 2

Gephyrocapsa kennettii sp. nov., a new calcareous nannofossil species from the Middle Pleistocene, Solomon Sea, western equatorial Pacific 赤道西太平洋所罗门海中更新世钙质纳米化石一新种Gephyrocapsa kennettii sp. nov.

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2021-01-01 DOI: 10.47894/mpal.67.1.01

C. Chuang, K. Wei, H. Mii, Hui-Ying Suk, L. Lo

{"title":"Gephyrocapsa kennettii sp. nov., a new calcareous nannofossil species from the Middle Pleistocene, Solomon Sea, western equatorial Pacific","authors":"C. Chuang, K. Wei, H. Mii, Hui-Ying Suk, L. Lo","doi":"10.47894/mpal.67.1.01","DOIUrl":"https://doi.org/10.47894/mpal.67.1.01","url":null,"abstract":"Detailed examinations of middle Pleistocene sediments of ODP Hole 1115B and CoreMD05-2925 in the Solomon Sea, southwest equatorial Pacific, reveal a distinctive new form of the calcareous nannofossil group of gephyrocapsid which has peculiar elongate kite-shaped slits on the distal shields of the coccolith. A new species,Gephyrocapsa kennettii sp. nov., is proposed and described in this study with SEM (scanning electron microscope) images. The coccolith of this new species is elliptical in shape, bearing 2 to 19 kite-shaped slits on the distal shield and a low-angle, raised arch-like bridge. The distal shield has fewer slits than G. protohuxleyi which has slits in between all elements. The bridge is orientated clockwise with am approximate 10 degree angle to the long axis when viewed distally. The average length of the distal shield is 3.26 plus or minus 0.22 (1 theta) mu m (n = 36), and, by definition, this new species belongs to the small Gephyrocapsa group. The chronologic range of this species is short, spanning only from 0.520â€“0.465 Ma. Its last occurrence datum is almost coevalwith that of Pseudoemiliania lacunosa at the bottom of Marine Isotope Stage 12. Morphologically, G. kennettii sp. nov. is intermediate between G. ericsonii and G. protohuxleyi and considered to be a transitional species originated by hybridization between them.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70445079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Stratigraphic development of a Late Oligocene Reef Complex under strong fluviatile influence in the Tertiary Piedmont Basin (Liguria, NWItaly) 强流体作用下第三系山前盆地晚渐新世礁杂岩的地层发育

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2021-01-01 DOI: 10.47894/mpal.67.4.01

A. Briguglio, G. Vannucci, Clarissa Bruzzone, M. Piazza

{"title":"Stratigraphic development of a Late Oligocene Reef Complex under strong fluviatile influence in the Tertiary Piedmont Basin (Liguria, NWItaly)","authors":"A. Briguglio, G. Vannucci, Clarissa Bruzzone, M. Piazza","doi":"10.47894/mpal.67.4.01","DOIUrl":"https://doi.org/10.47894/mpal.67.4.01","url":null,"abstract":"The modern-day decline of coral reefs due to bleaching events has been recognized as one of the major consequences of man-driven climate change. However, also eutrophication has been highlighted as an equally great danger for coral reefs and as such for biodiversity hotspots. In the latest years this phenomenon has moved to the forefront in the scientific community. Fossil reefs play a key role in studying the emergence, development and faunal/floral diversity of reef environments under eutrophic conditions. Their importance as valuable data sources for studying long-term changes of coral reef environments and their resilience cannot be disputed, especially since they may record the complete life cycle of a reef complex. In this study, nine sections nearby the town of Dego (Savona Province, NW Italy) are presented and discussed with regards to their lithostratigraphic and paleontological contents. Due to the extensive amount of data, the original morphology of a fringing reef, consisting of core, flank and fore reef, under strong fluviatile influence could be reconstructed. This study emphasizes the importance of the coralline red algae association in such biocarbonatic build-ups as major constituent and as substrate stabilizers. The sections record the original colonization event of the local basement by the builder community, the emergence of the coral reef and finally the suffocation by the fluviatile sediments. The variation of the red algae association reflects a deepening trend and is possibly correlated to enhanced fluvial input, which tends to deteriorate ecological conditions and functions as a major trigger for initial reef suffocation.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70445379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Elphidium tongaense (Cushman 1931), a quite old Recent foraminifer 汤加Elphidium tongaense (Cushman 1931)，相当古老的近代有孔虫

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2021-01-01 DOI: 10.47894/mpal.67.4.05

S. Filipescu, Angela Miclea

引用次数: 0

Roadian (earliest Guadalupian, middle Permian) radiolarians from the Guadalupe Mountains, West Texas, USA Part II: Spongy radiolarians (?Entactinaria and Spumellaria) 美国西德克萨斯州瓜达卢佩山脉的路迪亚纪(最早的瓜达卢佩纪，中二叠世)放射虫。第二部分:海绵状放射虫(?刺虫和刺虫)

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2021-01-01 DOI: 10.47894/mpal.67.6.01

G. Nestell, M. Nestell

{"title":"Roadian (earliest Guadalupian, middle Permian) radiolarians from the Guadalupe Mountains, West Texas, USA Part II: Spongy radiolarians (?Entactinaria and Spumellaria)","authors":"G. Nestell, M. Nestell","doi":"10.47894/mpal.67.6.01","DOIUrl":"https://doi.org/10.47894/mpal.67.6.01","url":null,"abstract":"Spongy radiolarians are described from strata of the Roadian Stage (Guadalupian, middle Permian) exposed in a small quarry (Quarry section) in the Guadalupe Mountains,West Texas. These radiolarians are assigned to the orders Entactinaria (conditionally) and Spumellaria. Two new families Hegleriidae and Glomispinidae are proposed. The genus Hegleria Nazarov and Ormiston and its two species, H. mammilla (Sheng andWang) and H. mammifera Nazarov and Ormiston are discussed. Based on an analysis of the distribution and preservation of the illustrated specimens of these two species in the literature, it is proposed that the species H. mammilla should be considered as nomen dubium. The genus Uberinterna Sashida and Tonishi and one species Copicyntra simulens Nazarov and Ormiston are revised. Five new genera, Texasospongites, Allenispongus, Cutoffella, Glomispina, and Orminazarella, and ten new species Texasospongites fazleevi, Allenispongus nobilis, Cutoffella perplexa, Glomispina mirifica, Uberinterna hearstae, U. ancestralis, Provisocyntra vancouveringi, Orminazarella nuda, Paracopicyntra bella, and Copiellintra variabilis are described.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70446145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 7

Foraminifera in the glacial erratic rock Heiligenhafener Kieselgestein of northern Germany 德国北部Heiligenhafener-Kieselgestein冰川不稳定岩石中的有孔虫

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-09-01 DOI: 10.47894/mpal.66.5.03

M. Hesemann

引用次数: 0

Stratigraphic record of Eponides Montfort 1808 (benthic Foraminifera) through the Paleocene carbonates of the northern Neotethys margin 1808年Eponides Montfort(底栖有孔虫目)的地层记录，贯穿新特提斯北部边缘的古新世碳酸盐

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-09-01 DOI: 10.47894/mpal.66.5.01

L. Consorti, F. Schlagintweit, F. Koroglu, K. Rashidi

引用次数: 1

New names for the species Nodosaria catenulata Karavaeva and Nestell 2007 and Nodosaria costata Karavaeva and Nestell 2007 (Foraminifera) catenulata Nodosaria Karavaeva和Nestell 2007和costata Nodosaria Karavaeva和Nestell 2007的新名称(有孔虫目)