Subjects -> PALEONTOLOGY (Total: 46 journals)
Showing 1 - 21 of 21 Journals sorted alphabetically
Acta Palaeontologica Polonica     Open Access   (Followers: 6)
Alcheringa: An Australasian Journal of Palaeontology     Hybrid Journal   (Followers: 7)
Ameghiniana     Open Access   (Followers: 1)
Annales de Paléontologie     Full-text available via subscription   (Followers: 7)
Annals of Carnegie Museum     Full-text available via subscription   (Followers: 1)
Boreas: An International Journal of Quaternary Research     Hybrid Journal   (Followers: 12)
Comptes Rendus Palevol     Full-text available via subscription  
European Journal of Protistology     Hybrid Journal   (Followers: 6)
EvoDevo     Open Access   (Followers: 4)
Facies     Hybrid Journal   (Followers: 10)
Fossil Record     Open Access   (Followers: 5)
Geobios     Full-text available via subscription   (Followers: 6)
Historical Biology: An International Journal of Paleobiology     Hybrid Journal   (Followers: 9)
Ichnos: An International Journal for Plant and Animal Traces     Hybrid Journal  
International Journal of Speleology     Open Access   (Followers: 3)
Journal of Paleolimnology     Hybrid Journal   (Followers: 6)
Journal of Paleontology     Hybrid Journal   (Followers: 11)
Journal of Quaternary Science     Hybrid Journal   (Followers: 31)
Journal of Vertebrate Paleontology     Full-text available via subscription   (Followers: 12)
Marine Micropaleontology     Hybrid Journal   (Followers: 2)
Micropaleontology     Full-text available via subscription  
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen     Full-text available via subscription   (Followers: 4)
Novitates Paleoentomologicae     Open Access   (Followers: 1)
Open Quaternary     Open Access   (Followers: 1)
Palaeogeography, Palaeoclimatology, Palaeoecology     Hybrid Journal   (Followers: 13)
Palaeontology     Hybrid Journal   (Followers: 18)
Palaeoworld     Hybrid Journal   (Followers: 3)
PALAIOS     Hybrid Journal   (Followers: 7)
Paläontologische Zeitschrift     Hybrid Journal   (Followers: 4)
Paleobiology     Full-text available via subscription   (Followers: 6)
PaleoBios     Open Access   (Followers: 1)
Paleoceanography     Full-text available via subscription   (Followers: 4)
Paleontological Journal     Full-text available via subscription   (Followers: 5)
Paleontological Research     Full-text available via subscription   (Followers: 3)
Palynology     Hybrid Journal   (Followers: 2)
Papers in Palaeontology     Hybrid Journal   (Followers: 1)
Quaternaire     Open Access   (Followers: 2)
Quaternary Research     Full-text available via subscription   (Followers: 20)
Quaternary Science Reviews     Hybrid Journal   (Followers: 25)
Review of Palaeobotany and Palynology     Hybrid Journal   (Followers: 2)
Revue de Micropaleontologie     Full-text available via subscription  
Rivista Italiana di Paleontologia e Stratigrafia (Research In Paleontology and Stratigraphy)     Open Access   (Followers: 2)
Spanish Journal of Palaeontology     Open Access  
Swiss Journal of Palaeontology     Hybrid Journal   (Followers: 4)
Vertebrate Anatomy Morphology Palaeontology     Open Access   (Followers: 2)
Zitteliana     Open Access   (Followers: 5)
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Revue de Micropaleontologie
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Number of Followers: 0  
  Full-text available via subscription Subscription journal
ISSN (Print) 0035-1598 - ISSN (Online) 0035-1598
Published by Elsevier Homepage  [3203 journals]
  • Factors controlling the deformation of benthic foraminifera in the Manzala
           lagoon, Egypt
    • Abstract: Publication date: Available online 29 March 2019Source: Revue de MicropaléontologieAuthor(s): A.M. Badr-El Din, A.A. El-Badry, O.H. OrabiAbstractMorphological deformations among hyaline and porcelaneous benthic foraminiferal were observed at stations with high contents of trace metals within the Manzala Lagoon. Energy Dispersive X-ray Analyses (EDX) were conducted on deformed and non-deformed specimens of this population. Deformed Adelosina sp. specimens show high sulfur, magnesium, iron and low copper content. The deformed Ammonia tepida show high aluminum, chloride, calcite and copper in the shell. Analyses of non-deformed foraminifera tests at unpolluted localities show that A. tepida displays high calcium content only, whereas Adelosina sp. shows calcium and magnesium. It is worth mentioning that the non-deformed tests of both species are free from copper and sulfur. We conclude that the low salinity and/or high trace metals in the western and southern regions of the Manzala Lagoon are the main cause for the reduction in overall size of the foraminiferal shells. Porcelaneous Adelosina sp. is very rare (0 to 2%) and mainly found on the northern side, where salinity increases, whereas hyaline A. tepida is the most dominant species in the lagoon and covers more than 97% of the total benthic foraminifera.
  • Terrestrial plant microfossils in palaeoenvironmental studies, pollen,
           microcharcoal and phytolith. Towards a comprehensive understanding of
           vegetation, fire and climate changes over the past one million years
    • Abstract: Publication date: Available online 21 March 2019Source: Revue de MicropaléontologieAuthor(s): Anne-Laure Daniau, Stéphanie Desprat, Julie C. Aleman, Laurent Bremond, Basil Davis, William Fletcher, Jennifer R. Marlon, Laurent Marquer, Vincent Montade, César Morales-Molino, Filipa Naughton, Damien Rius, Dunia H. UrregoAbstractThe Earth has experienced large changes in global and regional climates over the past one million years. Understanding processes and feedbacks that control those past environmental changes is of great interest for better understanding the nature, direction and magnitude of current climate change, its effect on life, and on the physical, biological and chemical processes and ecosystem services important for human well-being. Microfossils from terrestrial plants – pollen, microcharcoal and phytoliths – preserved in terrestrial and marine sedimentary archives are particularly useful tools to document changes in vegetation, fire and land climate. They are well-preserved in a variety of depositional environments and provide quantitative reconstructions of past land cover and climate. Those microfossil data are widely available from public archives, and their spatial coverage includes almost all regions on Earth, including both high and low latitudes and altitudes. Here, we (i) review the laboratory procedures used to extract those microfossils from sediment for microscopic observations and the qualitative and quantitative information they provide, (ii) highlight the importance of regional and global databases for large-scale syntheses of environmental changes, and (iii) review the application of terrestrial plant microfossil records in palaeoclimatology and palaeoecology using key examples from specific regions and past periods.
  • Palynostratigraphic, palynofacies, organic geochemical and
           palaeoenvironmental analysis of the Silurian Tanezzuft Formation in the
           Ghadames Basin of north-west Libya
    • Abstract: Publication date: March 2019Source: Revue de Micropaléontologie, Volume 62, Issue 1Author(s): Waleed Shukry El Diasty, Salah Youssef El Beialy, Fadeel Ibrahim Fadeel, David J. BattenAbstractTwo palynofacies associations are documented from the Silurian Tanezzuft Formation in the Ghadames Basin. These are characteristic of the basal ‘Hot Shale’ and the overlying deposits, referred to here as the Cold Shale. The former reflects deposition in distal suboxic anoxic conditions and is dominated by highly oil-prone amorphous organic matter (AOM) typical of deposition in generally anoxic, restricted marine basins. Only a few acritarchs, prasinophyte algae and chitinozoans occur in association: virtually no spores or cryptospores were recorded. Thick-walled prasinophytes are most numerous in this part of the Tanezzuft Formation in both the Ghadames and Murzuq basins, suggesting enhanced surface water productivity. Deposition took place after the melting of the Late Ordovician ice sheets, which led to a major marine transgression. The palynofacies recorded from the overlying ‘Cold Shale’ deposits indicate deposition in distal shelf and basin conditions that were also relatively anoxic. They contain more palynomorphs, especially acritarchs, and generally less AOM. The phytoplankton assemblages are dominated by simple and thin-walled prasinophyte algae (leiospheres), suggesting dysoxic–anoxic conditions. Overall the middle and the upper parts of the Tanezzuft Formation are regarded as being deposited in distal dysoxic–anoxic shelf, distal dysoxic–oxic shelf and distal suboxic–anoxic basin respectively. Because chitinozoans are very rare, age determinations of the samples investigated are based mainly on acritarchs. The Hot Shale is dated as early-mid Rhuddanian (early Llandovery) whereas the rest of the formation is considered to late Rhuddanian–Telychian in age. As documented previously from other samples of the Tanezzuft Formation in both the Ghadames and Murzuq basins, the Hot Shale has a very high TOC content and excellent source potential for liquid hydrocarbons, whereas rest of the formation is less rich in organic matter with larger terrestrial and oxidized components and hence reduced potential for sourcing hydrocarbons (both oil and gas).
  • Paleobiogeographic implications of the Middle Eocene ostracods from
           Cairo–Suez district, Egypt
    • Abstract: Publication date: March 2019Source: Revue de Micropaléontologie, Volume 62, Issue 1Author(s): Sherif M. El Baz, Mohamed M. KhalilAbstractThe main targets of this paper are to examine the Middle Eocene ostracod assemblages collected from a succession exposed in the Cairo–Suez district, Egypt and to detect their paleobiogeographical implications. The studied succession is subdivided into two rock units: the Observatory and Qurn formations, in ascending order. The analysis of the ostracod assemblages led to the identification of 18 species, none of which is new. Three local biozones are established, Digmocythere ismaili - Xestoleberis kenawyi Assemblage Zone, Grinioneis moosi - Loxoconcha pseudopunctatella Assemblage Zone and Cativella qurnenis - Soudanella triangulata Assemblage Zone. The multivariate analyses indicate that there are three distinct bioprovinces, one of them represents the North Africa bioprovince, including Egypt, Libya, and Tunisia. The second bioprovince represents the Middle East, including Jordan and Israel. The third represents the West Africa bioprovince, including Senegal, Togo, Ivory Coast and Nigeria. Therefore, this deduction supports a migration of Eocene ostracods along the southern Tethys.
  • New insights in late Miocene lower Chelif basin biostratigraphy based on
           planktonic foraminifera (Algeria)
    • Abstract: Publication date: March 2019Source: Revue de Micropaléontologie, Volume 62, Issue 1Author(s): Mostapha Benzina, Hakim Hebib, Mustapha BensalahAbstractQuantitative and qualitative analyses based on planktonic foraminifera of two sections (Oued Derdoussa and Djebel Meni) from lower Chelif basin (northern Algeria) enable us to identify for the first time a sequence of bioevents calibrated with the geomagnetic polarity time scale. The identified bioevents of late Miocene formations are useful for a high-resolution correlation in the whole western Mediterranean at local and regional scales. In particular, this work reveals that the sequence covers an interval of time that extends from the upper Tortonian up to the pre-evaporite Messinian period. Indeed, the base of the succession starts with a change in the coiling direction (from dextral to sinistral) of Neogloboquadrina acostaensis as the first bioevent. This later corresponds to the bioevent (1–8) assigned to the Tortonian sediments. This period is marked by the presence of Globorotalia menardii in sinistral coiled form that was substituted gradually with dextral coiled. The Tortonian/Messinian (T/M) boundary coincides to some extent with a sharp replacement of G. menardii group (I and II) with the first common occurrence (FCO) of Globorotalia miotumida plexus few meters below the development of the Tripoli diatomite formation (bioevent 9). This later is dominated mainly by highly convex species (G. miotumida plexus) marked by the presence of Globorotalia mediterranea in contrast with the marly formation at the base of the section. In this part, the recorded bioevents (10 to 17) are assigned to the Messinian sediments. Thus, the Tripoli formation shows the influx of Globorotalia nicolae and a small incursion of the dextrally coiled of Globorotalia scitula at the top of Oued Derdoussa section as a local bioevent that may be related to the local palaeoenvironment. We notice the absence of the change in the coiling from sinistral to dextral of N. acostaensis during the upper Messinian, this may be due to the coincidence of this bioevent with the barren levels.
  • New Marine Ostracoda from the Early Cretaceous (Upper
           Barremian – Aptian) of the Crimean Peninsula
    • Abstract: Publication date: March 2019Source: Revue de Micropaléontologie, Volume 62, Issue 1Author(s): Maria Karpuk, Robin Whatley, Caroline MayburyAbstractThis works focuses on the description of two new genera of Ostracoda: Gibbosocythere gen. nov. (Paradoxostomatidae, Brady and Norman) and Pseudotethysia gen. nov. (Cytheruridae G.W. Müller), and of three new species, Gibbosocythere ferelevis sp. nov., G. cellulata sp. nov. and Pseudotethysia reticulata sp. nov. from the Upper Barremian and Aptian of the Crimean Peninsula.
  • Benthic foraminiferal assemblages in the severely polluted coastal
           environment of Drapetsona-Keratsini, Saronikos Gulf (Greece)
    • Abstract: Publication date: March 2019Source: Revue de Micropaléontologie, Volume 62, Issue 1Author(s): Margarita D. Dimiza, Alexandra Ravani, Vasilios Kapsimalis, Ioannis P. Panagiotopoulos, Elisavet Skampa, Maria V. TriantaphyllouAbstractSurface sediments were collected from the coastal zone of Drapetsona–Keratsini (Saronikos Gulf, Greece) in December 2012 for determining the local benthic foraminiferal community, identifying their spatial distribution patterns, and evaluating the response of foraminiferal species to geochemical composition through the hierarchical cluster analysis, principal component analysis and Spearman's rho correlation. Foraminifera can be classified into three distinct assemblages associated with the granulometry, elemental geochemistry, particulate organic carbon content and degree of sediment contamination. A relatively low-diversity assemblage, dominated by stress-tolerant taxa with Ammonia tepida Bolivina spathulata and Bulimina elongata being the prevailing species, is characteristic of the silty seabed of the main part of Drapetsona coastal zone and the Keratsini Port central basin, where organic carbon content, aliphatic and polycyclic aromatic hydrocarbons concentrations and trace metal loads are greatly elevated. On the sandy bottom of the investigated area, relatively high frequencies of miliolids prevail. An epiphytic rotaliid-dominated assemblage is recorded in the slightly-polluted sedimentary bottom of the inner and western part of the Keratsini Port.
  • Eocene larger benthic foraminifera (alveolinids, nummulitids, and
           orthophragmines) from the eastern Alborz region (NE Iran): Taxonomy and
           biostratigraphy implications
    • Abstract: Publication date: Available online 26 February 2019Source: Revue de MicropaléontologieAuthor(s): Mehdi Hadi, György Less, Mohammad VahidiniaAbstractShallow marine Eocene successions are described and illustrated with major focus on the systematics and biostratigraphic interpretation of larger benthic foraminifera in two stratigraphic sections (Mojen & Kalateh) of the Ziarat Formation from the eastern Alborz zone (Iran). Based on the larger benthic foraminifera assemblages, six shallow benthic zones (SBZ8-SBZ10 and SBZ16'-SBZ17-SBZ18b) during the middle Ilerdian-early Cuisian and Late Lutetian'-Bartonian interval are identified for the first time. The Mojen section is mainly composed of Alveolina horizons as index markers, such as Alveolina decipiens (Schwager), A. tumida (Hottinger), A. ilerdensis (Hottinger), A. sp. cf. A. ilerdensis, A. laxa (Hottinger), A. citrea (Drobne), A. trempina (Hottinger), A. fornasinii (Checchia-Rispoli), A. canavarii (Checchia-Rispoli), A. cf. canavarii and A. aff. cayrazensis, which are consistent with the SBZ8 to SBZ10 interval, whilst the exact age of the top of the interval was not distinctly recognizable. The studied interval of the Kalateh section was assigned to the SBZ16'-SBZ17-SBZ18b with identifications of larger hyaline-lamellar foraminifera represented by Nummulites cf. deshayesi, N. lyelli (D’Archiac & Haime), Orbitoclypeus zitteli (Checchia-Rispoli) and Asterocyclina stella stella (Gümbel).
  • Cretaceous marine ostracod biostratigraphy of the South Atlantic Ocean: An
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Gerson Fauth, Marcos Antonio Batista dos Santos Filho, Daiane Ceolin, Felix GradsteinAbstractAn overview is presented of the biostratigraphic studies with Cretaceous marine ostracods of 14 South Atlantic basins, situated both in the African and South American continental margins. The majority of South American studies were developed after the 2000s, while the African ones were published earlier. Studies on the Brazilian equatorial margin show the potential for biostratigraphic and faunal correlations between the two continents, especially during the Albian–Turonian interval.
  • Dinoflagellate fossils: Geological and biological applications
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Aurélie Penaud, William Hardy, Clément Lambert, Fabienne Marret, Edwige Masure, Thomas Servais, Raffaele Siano, Mélanie Wary, Kenneth Neil MertensAbstractDinoflagellates are part of the marine plankton and about 200 species produce a cyst (dinocyst) during their life cycle, these organic-walled sexually-produced cysts being fossilizable in sediments for hundreds of millions of years. Over the past 40–50 years, dinocysts have led to major advances on Mesozoic-Cenozoic research, in terms of biostratigraphy and paleogeogeography. Dinocyst taxonomy has then been continuously revised, with the tabulation being the main morphological link between living dinoflagellates and fossilized cysts. Over the Quaternary, and based on the principle of uniformitarianism (i.e. species ecology did not change through time), relationships between modern assemblages and present-day environmental factors controlling their distribution also allow for dinocyst-based quantitative reconstructions derived from transfer function calculations. This paper presents a non-exhaustive review of the dinocyst literature allowing the reader to get a perspective about how they were discovered and defined, but also how they are applied in (paleo)ecological studies according to the timescale considered allowing then to provide useful insights into the future climate change and its associated ecological repercussions.
  • Fungal spores and fruiting bodies from Miocene deposits of the Pelotas
           Basin, Brazil
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Eduardo Premaor, Ramesh K. Saxena, Paulo Alves de Souza, Wolfgang KalkreuthAbstractMost of the palynological information from pre-Quaternary deposits of the Pelotas Basin, Southmost Brazil, refers to sporomorphs and dinoflagellate cysts. Fungal microfossil records are poorly detailed, and underutilized as biostratigraphic indexes or paleoenvironmental indicators. This work is derived from an extensive palynological analysis of 28 samples of cores from two wells (BP-01 and CBM001-ST-RS), corresponding to the Imbé and Cidreira formations, Miocene of this basin. Assemblages with fossilized remains of fungi, both as spores and fruiting bodies, have been recovered, totalizing 89 taxa, including 21 assigned to Amerosporae, 13 to Didymosporae, 28 to Phragmosporae, seven to Dictyosporae, two to Staurosporae and 18 related to Microthyriales. Majority of the species identified is recorded for the first time in Brazil, and compared to the fungi assemblages recorded in Cenozoic deposits from Argentina, USA, Canada, China and India, widening, therefore, their paleogeographic distribution. The occurrence of Phragmothyrites eocaenicus, Plochmopeltinites cooksoniae, P. masonii, Asterothyrites menonii, Trichothyrites amorphus and Parmathyrites ramanujamii, associated to data from other microfossil groups have indicated a Miocene age for the studied sections. A marine setting during the deposition is substantiated by the expressive amount of both dinoflagellate cysts and microforaminiferal linings. The presence of microthyriaceous fungi associated to pteridophytic spores and remarkable occurrence of Podocarpidites spp., reinforce the hypothesis of continental origin in a humid non-tropical climate.
  • Paleobiogeography of Mesozoic high-latitude radiolarians: Progress and
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Nikita Yu. Bragin, Liubov G. BraginaAbstractRadiolarians of the Mesozoic display strong provincialism. High-latitude assemblages differ from the low-latitude ones by low taxonomic diversity, the presence of characteristic taxa that are common only in high-latitude regions (as Glomeropyle for the Middle Triassic, Parvicingula with apical horn, Praeparvicingula and Echinocampidae (Echinocampe, Nordvikella and Arctocapsula) for the Late Jurassic–earliest Cretaceous, and Prunobrachiidae (Prunobrachium and Pseudobrachium) for the Late Cretaceous), and by domination of certain morphotypes such as pylomate spheres for the Middle Triassic or spongy discoids and spongy prunoids for the Late Cretaceous. Paleobiochores for some intervals of the Mesozoic (Middle and Late Triassic, Late Jurassic and Late Cretaceous) are proposed. The main problem of the Mesozoic radiolarian paleobiogeography is insufficient knowledge of high-latitude radiolarian assemblages, especially those of the Early Jurassic, and Early Cretaceous.
  • Mesozoic radiolarian biochronology – current status and
           future directions
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Špela Goričan, Luis O’Dogherty, Peter O. Baumgartner, Elizabeth S. Carter, Atsushi MatsuokaAbstractMesozoic radiolarian biochronologic scales have been developed since the 1970s and most of them reached their present day status in the 1990s. The degree of temporal resolution, on average, corresponds to substage level and is sufficient to provide a meaningful framework for general geological studies. The great majority of zonal schemes were elaborated in low-latitude sections but are applicable in high latitudes as well because an adequate number of species occur worldwide. This paper presents a short historical review and a synthesis of currently used zonations developed in North America, Europe and Asia. The advantages and the shortcomings of the existing zonations are discussed. As a general rule, the zonations including a high number of taxa in each zone have a much greater applicability for global correlations than those defined exclusively with marker taxa. In the forthcoming years, particular studies will focus on zonal division of under-explored time intervals and on improved calibration to chronostratigraphy. Two joint objectives for future research are briefly introduced. The first objective, achievable in a relatively short time, is to compile a composite Mesozoic zonation that would provide a single reference standard for radiolarian dating at a global scale. The second objective is to refine the radiolarian zonal schemes, which, in certain intervals, have already attained the resolution comparable to that of the standard ammonite zones. To increase the degree of precision and accuracy to this level through the entire Mesozoic is a long-term goal that requires additional high-resolution sampling and emphasis on detailed documentation of evolutionary first and last appearances in different phylogenetic lineages.
  • A review of the Late Permian – Early Triassic conodont record and its
           significance for the end-Permian mass extinction
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Xulong Lai, Haishui Jiang, Paul B. WignallAbstractAs a marine microfossil with a long-lasting fossil record stretching from the Cambrian to the Triassic, the tiny conodont plays an important role for the study of the end-Permian mass extinction. In the past few decades, numerous studies on Permian-Triassic conodonts have been published. This paper summarizes the progress made on high-resolution conodont biostratigraphy, timing of the mass extinction across the Permian-Triassic Boundary, conodont apparatus and phylogeny, conodont size variation, conodont oxygen isotope as well as other isotopes and chemical elements. Finally, future perspectives are also discussed.
  • Definition of benthic foraminiferal bioprovinces in transitional
           environments of the Eastern English Channel and the Southern North Sea
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Eric Armynot du Châtelet, Fabio Francescangeli, Fabrizio FrontaliniAbstractThe available benthic foraminiferal data in transitional environments along the English Channel and the Southern North Sea were computed to identify foraminiferal-based bioprovinces. A total of 901 samples characterized by 246 dead species and 656 samples represented by 99 living species were arranged in 3 large bioprovinces, namely England, France and the East English Channel. Dominant species such as those belonging to Haynesina and Cribroelphidium genera were widely distributed geographically. By contrast, high degrees of foraminiferal endemism were found in Belgian waters and the Canche and Liane estuaries. The results of our study reveal that dead foraminifera are better indicators of biogeographical provinces than living ones, which are related to environmental units.
  • Advances in planktonic foraminifer research: New perspectives for
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Ralf Schiebel, Sandi M. Smart, Anna Jentzen, Lukas Jonkers, Raphaël Morard, Julie Meilland, Elisabeth Michel, Helen K. Coxall, Pincelli M. Hull, Thibault de Garidel-Thoron, Tracy Aze, Frédéric Quillévéré, Haojia Ren, Daniel M. Sigman, Hubert B. Vonhof, Alfredo Martínez-García, Michal Kučera, Jelle Bijma, Howard J. Spero, Gerald H. HaugAbstractPlanktonic foraminifer tests are major archives of environmental change and provide a multitude of proxies in paleoceanography and paleoclimatology. The application of such proxies is contingent upon a collaborative effort to better understand how the living organisms record the properties of their environment and how the resulting signals are recorded in marine sediments. In this contribution, we provide a review of the rapidly developing sub-fields of research, where new advances have been made possible by technological developments, and by cross-disciplinary work of the scientific community. Following brief historical overviews of the sub-fields, we discuss the latest advances in planktonic foraminifer research and highlight the resulting new perspectives in ocean and climate research. Natural classification based on consistent species concepts forms the basis for analysis of any foraminifer-derived proxy. New approaches in taxonomy and phylogeny of Cenozoic planktonic foraminifers (Section 2) are presented, highlighting new perspectives on sensitivity and response of planktonic foraminifers to the changing climate and environment (Section 4). Calibration of foraminifer-specific data and environmental parameters is improving along with the technical development of probes and the access to samples from the natural environment (Section 3), enhancing our understanding of the ever-changing climate and ocean system. Comprehension of sedimentation and flux dynamics facilitates maximum gain of information from fossil assemblages (Section 5). Subtle changes in the physical (e.g., temperature), chemical (e.g., pH), and biological (e.g., food) conditions of ambient seawater affect the abundance of species and composition of assemblages as well as the chemical composition of the foraminifer shell and provide increasingly-detailed proxy data on paleoenvironments (Section 6).RésuméLes coquilles des foraminifères planctoniques sont des archives majeures des changements océaniques et climatiques et fournissent une multitude de proxies en paléocéanographie et en paléoclimatologie. L’utilisation de tels proxies nécessite une approche pluridisciplinaire afin de mieux comprendre comment les organismes vivants enregistrent les propriétés de leur environnement et comment le signal résultant est enregistré dans les sédiments marins. Dans cet article, nous présentons une revue des sous-domaines de recherche évoluant rapidement, où de nouveaux progrès sont rendus possibles par les développements technologiques, et par le travail interdisciplinaire de la communauté scientifique. Après de brefs aperçus historiques des sous-domaines, nous discutons des dernières avancées en matière de recherche sur les foraminifères planctoniques et soulignons les nouvelles perspectives qui en résultent dans la recherche sur les océans et le climat. La classification naturelle basée sur des concepts d’espèces constitue la base de toute analyse des proxies dérivés de foraminifères. De nouvelles approches en taxonomie et en phylogénie des foraminifères planctoniques du cénozoïque (Section 2) sont présentées, mettant en évidence de nouvelles perspectives de recherche sur la sensibilité des foraminifères planctoniques aux changements climatiques et à l’environnement (Section 4). La calibration des données spécifiques aux foraminifères et des paramètres environnementaux s’améliore avec le développement technique des sondes et l’accès aux échantillons provenant de l’environnement naturel (Section 3). Mieux comprendre la sédimentation et la dynamique des flux de coquilles permet d’obtenir plus d’informations à partir des assemblages fossiles (Section 5). Cela améliore notre compréhension du système climatique et océanique, en constante évolution. De subtils changements dans la composition physique (e.g., température), chimique (e.g., pH) et biologique (e.g., nourriture) de l’eau de mer ambiante affectent l’abondance des espèces de foraminifères, la composition de leurs assemblages ainsi que la composition chimique de leur coquille et fournit des données de proxies paléoenvironnementeaux de plus en plus détaillées (Section 6).
  • Advances in micropaleontology: 60th anniversary special volume
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Taniel Danelian, Frédérique Eynaud
  • High-resolution stratigraphy and palaeoenvironments of the
           Volgian-Valanginian in the Olenek key section (Anabar-Lena region, Arctic
           East Siberia, Russia)
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): B.L. Nikitenko, E.B. Pestchevitskaya, S.N. KhafaevaAbstractThe Volgian-Valanginian shallow-water deposits from the Olenek key section (Anabar-Lena region, Arctic Siberia) were studied by sedimentological, palaeontological and geochemical methods. High-resolution biostratigraphy of the studied interval is based on ammonites, foraminifera, and marine and terrestrial palynomorphs. An almost complete succession of ammonite zones provides biostratigraphic control for the upper part of the Buolkalakh Formation and the boundary between the Volgian and Boreal Berriasian stages. Foraminiferal and palynological zones have important regional implications providing well-constrained biostratigraphy of the Anabar-Lena region. Several levels important for interregional correlations are defined in the Volgian and Berriasian on the basis of taxonomic changes in microfossil assemblages as well as lowest and highest occurrences of indicative taxa. Combined sedimentological, geochemical studies and ecological analysis of microfossil associations (foraminifera, marine and terrestrial palynomoprhs) allowed the palaeoenvironmental reconstructions for the marginal area of the Anabar-Lena palaeosea and coastal land areas.
  • Offsets in the early Danian recovery phase in carbon isotopes: Evidence
           from the biometrics and phylogeny of the Cruciplacolithus lineage
    • Abstract: Publication date: December 2018Source: Revue de Micropaléontologie, Volume 61, Issues 3–4Author(s): Nicolas Thibault, Fabrice Minoletti, Silvia GardinAbstractChanges in the size and in the shape of the cross of the early Danian Cruciplacolithus lineage have been studied along with bulk carbon isotope data at two reference Cretaceous–Paleogene boundary sections: Bidart, SW France (Basque Basin) and Elles, central Tunisia (SW Tethys). Our study documents a progressive increase in the size of this lineage in the early Danian and allows for the definition of a new sub-lineage with a narrow central area and a broad axial cross composed of two species: a small, primitive and rare form, Cruciplacolithus praebornemannii n.sp. and a large common form Cruciplacolithus bornemannii n.sp. Successive first occurrences in the lineage of “axial cross” Cruciplacolithus can be correlated between the two sections. This correlation shows that the recovery phase in carbon isotopes following the Cretaceous–Paleogene boundary negative excursion is delayed in the southwestern Tethys compared to the Basque Basin. The delayed recovery in carbon isotopes at the Elles section could be related to the lengthened environmental stress in shelfal settings as compared to the pelagic settings of the Basque-Cantabrian basin. The emergence of Cruciplacolithus, the occurrence of the different lineages in this genus and the change in dominance from small to large forms are likely to be all related to the progressive ecosystem recovery in the early Danian.
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Heriot-Watt University
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