Journal of Foraminiferal Research最新文献_第4页

Comment on “Larger Benthic Foraminifera and Microfacies of Late Paleocene - Early Eocene Sections in Meghalaya, Northeast India” by Pereira et al. (2022) 对Pereira et al.(2022)《印度东北部梅加拉亚邦晚古新世-早始新世剖面的大型底生有孔虫和微相》的评论

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-10-01 DOI: 10.2113/gsjfr.52.4.202

M. Hadi

引用次数: 0

Allogromia Arnoldi n. sp.: Distribution, Phylogenetic Placement, Culture Methods, and Fine Structure of a New Monothalamid Foraminiferan Allogromia Arnoldi n. sp:一种新的单thalamid有孔虫的分布、系统发育定位、培养方法和精细结构

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-07-01 DOI: 10.2113/gsjfr.52.3.179

S. Goldstein, D. Ballero, E. Richardson, S. Bowser

{"title":"Allogromia Arnoldi n. sp.: Distribution, Phylogenetic Placement, Culture Methods, and Fine Structure of a New Monothalamid Foraminiferan","authors":"S. Goldstein, D. Ballero, E. Richardson, S. Bowser","doi":"10.2113/gsjfr.52.3.179","DOIUrl":"https://doi.org/10.2113/gsjfr.52.3.179","url":null,"abstract":"\u0000 Allogromiids, organic-walled foraminifera, are common members of foraminiferal associations in reef and back-reef settings of the Florida Keys and other locales, and many live in cryptic or otherwise protected microhabitats associated with macroalgae and seagrasses. A new species of Allogromia was isolated from the alga Dasycladus vermicularis (Scopoli) collected from prop-roots of the red mangrove, Rhizophora mangle (Linneaus), in Zane Grey Creek, Long Key, Florida. This species, Allogromia arnoldi n. sp., genetically matches sequences of undescribed and uncharacterized allogromiids deposited in GenBank from Cyprus and Jamaica. Allogromia arnoldi is genetically and morphologically distinct from A. laticollaris Arnold, A. laticollaris strain CSH, A. sp. NF (Lee & Pierce, 1963), environmental DNA sequences of morphologically unknown allogromiids, a number of freshwater forms, and several undescribed marine allogromiids known in the literature by nicknames (e.g., “squatter,” “rubble dome,” “twinkle”). This new species of Allogromia belongs to Clade M of the monothalamid foraminifera. Allogromia arnoldi appears to be broadly distributed, and it is fairly easy to isolate and rear in culture. Individuals typically have bright orange cytoplasm, a variable number of apertures, and can assume a wide range of shapes. Transmission electron microscopy (TEM) following high-pressure freezing and freeze substitution shows that the test has a complex fine structure that varies in thickness. It consists of two layers: a thick inner layer with a “herringbone” fine structure, and a thinner, outer electron-opaque mesh-like layer that occurs in patches. The number of nuclei varies per individual, and the non-reproductive nucleus is morphologically similar to that of many other monothalamid foraminifera.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46679299","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

Western to Central Equatorial Pacific Planktic Foraminiferal Fluxes: Implication for the Relationship Between Their Assemblage and Warm Pool Migration from 1999 to 2002 1999 - 2002年赤道太平洋西部至中部浮游有孔虫通量及其组合与暖池迁移关系的启示

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-07-01 DOI: 10.2113/gsjfr.52.3.140

M. Yamasaki, Ryo Tokumoto, A. Sasaki, C. Shimada, R. Schiebel

{"title":"Western to Central Equatorial Pacific Planktic Foraminiferal Fluxes: Implication for the Relationship Between Their Assemblage and Warm Pool Migration from 1999 to 2002","authors":"M. Yamasaki, Ryo Tokumoto, A. Sasaki, C. Shimada, R. Schiebel","doi":"10.2113/gsjfr.52.3.140","DOIUrl":"https://doi.org/10.2113/gsjfr.52.3.140","url":null,"abstract":"\u0000 Time-series sediment trap experiments were carried out in the western to central equatorial Pacific (Sites MT3, MT4, MT5, and MT7) from 1999 to 2002, over the transitional time period from La Niña to El Niño conditions, in order to evaluate temporal variability in planktic foraminiferal fluxes and their assemblages. The foraminiferal test flux follows a trophic gradient from higher fluxes in the Equatorial Upwelling Region (EUR) and lower fluxes in the Western Pacific Warm Pool (WPWP) region. Globigerinoides ruber commonly dominates in all sites through the experimental period. Trilobatus sacculifer, Globigerinita glutinata, and Neogloboquadrina dutertrei occurred especially in the WPWP. In contrast, Globigerina bulloides and Pulleniatina obliquiloculata characterized the fauna in the EUR.\u0000 A change in hydrologic conditions from La Niña to El Niño was documented along the sites during the sampled time interval. Simultaneous with an eastward advancement of the WPWP, the EUR retreated to the east. Rapid decreases in the fluxes of G. ruber, G. bulloides, and P. obliquiloculata were recognized immediately after the more oligotrophic WPWP conditions prevailed at Sites MT4, MT5, and MT7. Fluxes of the total planktic foraminifer assemblage increased both in the EUR and in the western side of the WPWP under full El Niño conditions during the second half of 2002. Such increases in test fluxes in the western side of the WPWP were mainly attributed to G. ruber and N. dutertrei, suggesting inputs of eutrophic waters from the northern coastal area of Papua New Guinea. Test fluxes under El Niño conditions in the WPWP were at the same level as those in the EUR, giving rise to strongly increased carbonate fluxes in the western equatorial Pacific.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41810875","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: 3

2022 Cushman Foundation Awards and Grant Recipients 2022年库什曼基金会奖项和赠款获得者

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-07-01 DOI: 10.2113/gsjfr.52.3.193

引用次数: 0

Obituary for David B. Scott, B.S., M.S., Ph.D., 1947-2021 David B. Scott的讣告，b.a.， m.s.， Ph.D, 1947-2021

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-07-01 DOI: 10.2113/gsjfr.52.3.189

Peter J. van Hengstum

引用次数: 0

On the Variability of Benthic Foraminiferal Species of the Genus Ramulina in the Tethys 特提斯螺旋藻属底栖有孔虫物种的变异性

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-07-01 DOI: 10.2113/gsjfr.52.3.133

H. Anan

引用次数: 0

Diversity and Depth Distribution of Modern Benthic Foraminifera Offshore Brunei Darussalam 文莱达鲁萨兰国近海现代底栖有孔虫的多样性和深度分布

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-07-01 DOI: 10.2113/gsjfr.52.3.160

Sulia Goeting, Vlasta Ćosović, A. Benedetti, Flavia Fiorini, L. Kocsis, A. Roslim, A. Briguglio

{"title":"Diversity and Depth Distribution of Modern Benthic Foraminifera Offshore Brunei Darussalam","authors":"Sulia Goeting, Vlasta Ćosović, A. Benedetti, Flavia Fiorini, L. Kocsis, A. Roslim, A. Briguglio","doi":"10.2113/gsjfr.52.3.160","DOIUrl":"https://doi.org/10.2113/gsjfr.52.3.160","url":null,"abstract":"\u0000 The distribution of modern benthic foraminifera is studied from offshore mixed carbonate-siliciclastic settings of Brunei Darussalam located in northwestern Borneo (South China Sea). The sediments were collected from 17 sites (i.e., shallow reefs, sunken wrecks, and two depth transects). A total of 231 species were identified from 8 to 63 m water depth. We conducted several analyses to understand the patterns of faunal composition, including: (1) Cluster analysis and Principal Component Analysis together with correlation to define relation among the sites; (2) Diversity indices, such as Shannon Index and Fisher's Alpha Index to assess diversity patterns at sites; and (3) Foram Index (FI) to determine whether the water quality indicates conditions that support reef growth. The most abundant foraminiferal groups from the reef and most wreck samples are larger benthic foraminifera (LBF), especially Calcarinidae and Amphisteginidae, whereas in the muddier sites the most abundant are smaller benthic foraminifera (SBF) with the genera Pseudorotalia and Asterorotalia. Certain species from the groups have shown patterns that do or do not correlate with depth and clay content.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46420276","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

Seasonal Distribution of Benthic Foraminifera Associated with the Marine Sponge Liosina Paradoxa Thiele, 1899 at Sandspit Backwaters, Karachi, Pakistan 与海洋海绵Liosina Paradoxa Thiele有关的底栖有孔虫的季节分布，1899年，在巴基斯坦卡拉奇沙口回水处

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-07-01 DOI: 10.2113/gsjfr.52.3.127

Hina Jabeen, S. Shafique, Z. Burhan, M. Rasheed, P. J. Siddiqui

{"title":"Seasonal Distribution of Benthic Foraminifera Associated with the Marine Sponge Liosina Paradoxa Thiele, 1899 at Sandspit Backwaters, Karachi, Pakistan","authors":"Hina Jabeen, S. Shafique, Z. Burhan, M. Rasheed, P. J. Siddiqui","doi":"10.2113/gsjfr.52.3.127","DOIUrl":"https://doi.org/10.2113/gsjfr.52.3.127","url":null,"abstract":"\u0000 Seasonal diversity and distribution of seven benthic foraminiferal species belonging to six families in association with the marine sponge Liosina paradoxa attached to pneumatophores of the mangrove Avicennia marina were documented at four sampling stations (St1–St4), Sandspit backwaters, Karachi coast during 2013. The calcareous species Ammonia sp. and Quinqueloculina laevigata were recorded at all stations in different seasons whereas the agglutinated species Ammotium cassis and Rotaliammina squamiformis were the most dominant species throughout the study. During the study period, water temperature ranged between 22.5–30.3°C, salinity ranged from 35–40, dissolved oxygen ranged from 0.11–3.45 mg L−1, and pH ranged from 7.15–7.69. The maximum relative abundance (45.65%) of foraminiferal species occurred at St2 from an exposed area while minimum relative abundances (13.04%) were recorded at St3 in sheltered areas. A K-dominance curve showed that highest frequency values in species were observed in the post-monsoon season as compared to the monsoon season. The present study is the first to report the foraminiferal assemblages associated with a marine sponge (Liosina paradoxa) from the mangrove habitat at Sandspit backwaters, Karachi.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45993092","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: 0

Ephemeral Masks in the Ellipsoidal Foraminifera Alveolinella and Borelis (Alveolinoidea): Resilient Solutions to Stabilization in Coral-Reef Settings 椭球状有孔虫Alveolinella和Borelis（Alveolinoidea）的短暂掩蔽：珊瑚礁环境中稳定的弹性解决方案

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-04-01 DOI: 10.2113/gsjfr.52.2.92

D. Bassi, J. Pignatti, S. Abramovich, K. Fujita, J. Hohenegger, J. Lipps, Y. Iryu

{"title":"Ephemeral Masks in the Ellipsoidal Foraminifera Alveolinella and Borelis (Alveolinoidea): Resilient Solutions to Stabilization in Coral-Reef Settings","authors":"D. Bassi, J. Pignatti, S. Abramovich, K. Fujita, J. Hohenegger, J. Lipps, Y. Iryu","doi":"10.2113/gsjfr.52.2.92","DOIUrl":"https://doi.org/10.2113/gsjfr.52.2.92","url":null,"abstract":"\u0000 In modern Indo-Pacific coral-reef areas, the porcelaneous larger foraminifera Alveolinella quoyi and Borelis schlumbergeri, the only extant prolate ellipsoidal alveolinoids, live on sandy and coral-rubble substrates. Apertural features are functional elements of shell morphology; therefore, specimens were investigated to assess these characters. The primary apertures of these alveolinoid forms can be obstructed by two different masks (mineralized infraskeletal shell elements): sinusoidal reverse masks (pending from the upper border of the aperture) and upright (rising from the lower border).\u0000 Alveolinella quoyi exhibits sinusoidal reverse masks, whereas Borelis schlumbergeri has upright masks. These masks consist of discrete groups of needle-shaped crystals. The reverse masks are part of the apertural rim, whereas the upright masks form from the basal layer. These ephemeral characters occur at the terminal stage of the formation of the apertural face and are resorbed after the calcification of the new chamber. These features, with no or very low fossilization potential, appear to reflect distinct functions during chamber growth. The extruding protoplasm from the reverse-mask and upright mask-bearing apertures enhances shell stabilization. In the poles, where the reverse masks and upright masks do not occur, the protoplasm likely enables motility.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46492329","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: 2

Early Maastrichtian-Early Eocene Biostratigraphy of El Hasana Area, Central Sinai, Egypt 埃及中西奈El Hasana地区早马斯特里赫特-早始新世生物地层学

IF 1.1 4区地球科学

Journal of Foraminiferal Research Pub Date : 2022-04-01 DOI: 10.2113/gsjfr.52.2.75

Adel El Shahawy, A. Ismail, M. Faris, A. A. Naby

{"title":"Early Maastrichtian-Early Eocene Biostratigraphy of El Hasana Area, Central Sinai, Egypt","authors":"Adel El Shahawy, A. Ismail, M. Faris, A. A. Naby","doi":"10.2113/gsjfr.52.2.75","DOIUrl":"https://doi.org/10.2113/gsjfr.52.2.75","url":null,"abstract":"\u0000 Ten calcareous nannofossils and ten planktic foraminiferal biozones were recognized from two sections measured in El Hasana area, in Central Sinai, Egypt. In the West El Hasana section, an early Maastrichtian/early Paleocene (K/Pg) unconformity was recorded due to the absence of the planktic foraminiferal Gansserina gansseri, Abathomphalus mayaroensis, and Globigerina eugubina Zones and the calcareous nannoplankton Micula prinsii and Markalius inversus Zones. The early Paleocene is represented by two biozones, Morozovella pseudobulloides (P1b) and Morozovella trinidadensis (P1c) that correlate with the Cruciplacolithus tenuis Zone (NP2), Chiasmolithus danicus Zone (NP3), and Ellipsolithus macellus Zone (NP4). In both sections, during the middle Paleocene three biozones were recorded: Morozovella uncinata (P2), the lower part of P3 Morozovella angulata, and Planorotalites pusilla pusilla (upper part of P3). The first and second biozones are equated with the upper two thirds of Ellipsolithus macellus (NP4), while the third one is correlated with Fasciculithus tympaniformis Zone (NP5). In the West El Hasana section, the Planorotalites pseudomenardii Zone (P4) ends the measured section. A small hiatus was observed across the late Paleocene/early Eocene (P/E) boundary in the East El Hasana section. This hiatus is due to the absence of the Planorotalites pseudomenardii Zone (P4), Morozovella velascoensis Zone (P5), M. edgari Zone (lower part of P6) and Heliolithus kleinpellii Zone (NP6), Discoaster molheri Zone (NP7), Heliolithus riedelli/Discoaster nobilis Zone (NP8), and Discoaster spp. (e.g., D. araneus) Subzone NP9a. The P/E boundary in East El Hasana section is delineated with the appearance of Rhomboaster spp. (e.g., Rhomboaster bitrifida) NP9b Subzone that coincides with the appearance of the planktic foraminiferal Morozovella subbotinae Zone (upper part of P6).","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46502420","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