RECENT PUBLICATIONS ON FORAMINIFERA 2011 (2)
DANIAN-SELANDIAN BENTHIC FORAMINIFERAL BIOSTRATIGRAPHY OF WESTERN SIBERIA
Danian and Selandian successions in western Siberia are rich in calcareous benthic foraminifers. The assemblages with a constant systematic composition that have the widest lateral occurrence are distinguished as foraminiferal zones. The Brotzenella praeacuta Zone was established in the low-carbonate, clayey beds that form the transition from the Gankinskaya Suite to the Talitskaya Suite. These transitional beds are assigned to the Danian. The calcareous benthic foraminifers in this zone occur mainly together with agglutinated forms. The zone is traced along the areas of the largest subsidence of the Mesozoic-Cenozoic basin, principally in depressions. The transition from the Cretaceous to the Palaeogene is represented by a continuous succession, in which the Danian deposits escaped from erosion and were found to contain the B. praeacuta assemblage. ......
Podobina, V., 2011. The Danian and Selandian calcareous benthic foraminiferal assemblages and biostratigraphy of Western Siberia. Geologos 17 (2), 97--110.
REVISED TAXONOMIC AND PHYLOGENERIC CONCEPT OF Globigerinoides ruber
...... The remaining two genetic types of G. ruber (white), labelled as Types IIa and IIb, represent a distinct phylogenetic lineage (G. ruber sensu lato), closer related to Globigerinoides conglobatus. Here we combine molecular clock and morphometric analyses to shed light on the taxonomical and phylogenetic significance of the presence of these two distinct lineages within the morphotaxon G. ruber. ...... Our results suggest that specimens of Type IIa that represent the G. ruber sensu lato lineage are morphologically identical to the concept of the G. ruber sensu lato morphotype in recent literature, and that these morphotypes are consistent with the species definition of Globigerinoides elongatus. We therefore propose that the name G. elongatus (sensu d'Orbigny) should be reinstated and used for the genetic Type IIa. The name G. ruber (sensu d'Orbigny) should be reserved for specimens of the pink chromotype. Specimens of Types Ia, Ib and Ib2 require new species names, but our data are not sufficient to provide a morphological character separating these species from their sister G. ruber (pink), other than by their shell colouration. (ABSTRACT)
Aurahs, R., Treis, Y., Darling, K., Kucera, M., 2011. A revised taxonomic and phylogenetic concept for the planktonic foraminifer species Globigerinoides ruber based on molecular and morphometric evidence. Marine Micropaleontology 79 (1–2), 1-14.
Mg/Ca and ∂18O in Hayalinea balthica
Core top samples from Indonesian and northeast Atlantic depth transects were used to calibrate Mg/Ca and δ18O in tests of the calcitic benthic foraminifer Hyalinea balthica to bottom water temperature between 4°C and 13°C. This shallow infaunal species is primarily abundant in neritic to upper bathyal sediments (<600 m). Both linear and exponential calibrations suggest a temperature sensitivity of ∼12% per °C that is ∼4 times higher than observed in other species of deep-sea benthic foraminifera. Culture experiments support the core top calibration. ...... We propose that the relatively high Mg content and temperature sensitivity of H. balthica might be due to minor, biologically mediated contribution of high-Mg calcite to the primarily low Mg calcite test, which is influenced by the ambient temperature. This hypothesis, if correct, suggests that benthic species with relatively high Mg/Ca may be better suited for deepwater temperature reconstructions than species that have thus far been more commonly used. (ABSTRACT)
Rosenthal, Y., Morley, A., Barras, C., Katz, M. E., Jorissen, F., Reichart, G-J., Oppo, D. W., Linsley, B. K., 2011. Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica. Geochemistry, Geophysics, Geosystems 12, Q04003, doi:10.1029/2010GC003333
EUKARYOTIC RICHNESS IN THE ABYSS
...... Here, we examined the richness of eukaryotic DNA in deep Arctic and Southern Ocean samples using massively parallel sequencing of the 18S ribosomal RNA (rRNA) V9 hypervariable region. ...... By clustering sequences having up to 3 differences, we observed from 942 to 1756 Operational Taxonomic Units (OTUs) per sample. Taxonomic analyses of these OTUs showed that DNA of all major groups of eukaryotes is represented at the deep-sea floor. The dinoflagellates, cercozoans, ciliates, and euglenozoans predominate, contributing to 17%, 16%, 10%, and 8% of all assigned OTUs, respectively. Interestingly, many sequences represent photosynthetic taxa or are similar to those reported from the environmental surveys of surface waters. Moreover, each sample contained from 31 to 71 different metazoan OTUs despite the small sample volume collected. This indicates that a significant faction of the eukaryotic DNA sequences likely do not belong to living organisms, but represent either free, extracellular DNA or remains and resting stages of planktonic species. ...... In view of our study, the deep-sea floor appears as a global DNA repository, which preserves genetic information about organisms living in the sediment, as well as in the water column above it. ...... (ABSTRACT)
Pawlowski, J., Christen, R., Lecroq, B., Bachar, D., Shahbazkia, H. R., Amaral-Zettler, L., Guillou, L., 2011. Eukaryotic Richness in the Abyss: Insights from Pyrotag Sequencing. PLoS ONE 6 (4): e18169. doi:10.1371/journal.pone.0018169
XENOPHYOPHORES FROM THE NAZARÉ CANYON
Xenophyophores are abundant on a terrace of the lower Nazaré Canyon (4300 m water depth) on the Portuguese margin. Here, the most abundant species, Reticulammina cerebreformis sp. nov., occurs in densities of up to 21 individuals per m2. ...... The second species at the 4300-m site, Nazareammina tenera gen. et sp. nov., is much less common. ...... Also common at this deep site are clusters, with a maximum diameter up to 10 cm or occasionally more, of irregular tubes belonging to Aschemonella ramuliformis Brady 1884, a species previously known mainly from isolated tubes. ...... Almost complete SSU rDNA gene sequences obtained from A. ramuliformis and R. cerebreformis confirm that these xenophyophores are foraminifera. Together with two previously sequenced xenophophores (Shinkaia lindsayi Lecroq, Gooday, Tsuchiya, Pawlowski 2009 and Syringammina corbicula Richardson 2001), and the foraminiferan Rhizammina algaeformis, they constitute a clade within the radiation of monothalamous foraminifera. In situ photographs of R. cerebreformis and A. ramuliformis reveal no evidence of pseudopodia deployed onto the sediment surface. Instead, these species probably trap sediment within their complex, folded test surface (R. cerebreformis) or intercept suspended particles (A. ramuliformis). (ABSTRACT)
Gooday, A. J., da Silva, A. A., Pawlowski, J., in press. Xenophyophores (Rhizaria, Foraminifera) from the Nazaré Canyon (Portuguese margin, NE Atlantic). Deep Sea Research II, doi:10.1016/j.dsr2.2011.04.005
SARMATIAN–PANNONIAN PALAEOENVIRONMENTAL CHANGES
The Sarmatian-Pannonian transition has been investigated in Section A of Oarba de Mures in the central Transylvanian Basin. Micropaleontological assemblages are diagnostic for different environmental settings and demonstrate a clear zonation, which was used to reconstruct the genetic units. Five stratigraphic sequences were described and subdivided based on the microfossil assemblages. Transgressive intervals were documented by five-chambered and biserial planktonic foraminifera, normal regressions by assemblages with abundant mysid, dasyclads, diatoms, and benthic rotaliid foraminifera, while the forced regressions are characterized by reworking. The Sarmatian-Pannonian boundary (11.3 Ma) is clearly documented by microfossils and is calibrated with radiometric and magnetostratigraphic data. A new interpretation for the interbasinal correlation is proposed by synchronizing the top of the Central Paratethyan Sarmatian with the top of the Eastern Paratethyan Bessarabian. (ABSTRACT)
Filipescu, S., Wanek, F., Miclea, A., de Leeuw, A., Vasiliev, I., 2011. Micropaleontological response to the changing paleoenvironment across the Sarmatian-Pannonian boundary in the Transylvanian Basin (Miocene, Oarba de Mures section, Romania). Geologica Carpathica 62 (1), 91-102.
PHYLOGENY OF CENOZOIC MACROPERFORATE PLANKTONIC FORAMINIFERA
We present a complete phylogeny of macroperforate planktonic foraminifer species of the Cenozoic Era (∼65 million years ago to present). The phylogeny is developed from a large body of palaeontological work that details the evolutionary relationships and stratigraphic (time) distributions of species-level taxa identified from morphology (‘morphospecies’). Morphospecies are assigned to morphogroups and ecogroups depending on test morphology and inferred habitat, respectively. Because gradual evolution is well documented in this clade, we have identified many instances of morphospecies intergrading over time, allowing us to eliminate ‘pseudospeciation’ and ‘pseudoextinction’ from the record and thereby permit the construction of a more natural phylogeny based on inferred biological lineages. Each cladogenetic event is determined as either budding or bifurcating depending on the pattern of morphological change at the time of branching. This lineage phylogeny provides palaeontologically calibrated ages for each divergence that are entirely independent of molecular data. The tree provides a model system for macroevolutionary studies in the fossil record addressing questions of speciation, extinction, and rates and patterns of evolution. (ABSTRACT)
Aze, T., Ezard, T. H. G., Purvis, A., Coxall, H. K., Stewart, D. R. M., Wade, B. S., Pearson, P. N., in press. A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews, DOI: 10.1111/j.1469-185X.2011.00178.x
20TH CENTURY BARENTS SEA WARMING
...... Climate modelling has also demonstrated that the global warming signal will be amplified in the polar region. Such temperature increases would have important implications on the ecosystem and biota of the Barents Sea. This study therefore aims to reconstruct the climatic changes of the Barents Sea based on benthic foraminifera over approximately the last 1400 years at the decadal to sub-decadal scale. Oxygen and carbon isotope analysis and benthic foraminiferal species counts indicate an overall warming trend of approximately 2.6°C through the 1400-year record. In addition, the well-documented cooling period equating to the ‘Little Ice Age’ is evident between c. 1650 and 1850. Most notably, a series of highly fluctuating temperatures are observed over the last century. An increase of 1.5°C is shown across this period. Thus for the first time we are able to demonstrate that the recent Arctic warming is also reflected in the oceanic micro-fauna. (ABSTRACT)
Wilson, L. J., Hald, M., Godtliebsen, F., in press. Foraminiferal faunal evidence of tewntieth-century Barents Sea warming. The Holocene, doi:10.1177/0959683610385718
CLIMATE CHANGE, SPECIES ECOLOGY & EVOLUTIONARY DYNAMICS
Ecological change provokes speciation and extinction, but our knowledge of the interplay among the biotic and abiotic drivers of macroevolution remains limited. Using the unparalleled fossil record of Cenozoic macroperforate planktonic foraminifera, we demonstrate that macroevolutionary dynamics depend on the interaction between species’ ecology and the changing climate. This interplay drives diversification but differs between speciation probability and extinction risk: Speciation was more strongly shaped by diversity dependence than by climate change, whereas the reverse was true for extinction. Crucially, no single ecology was optimal in all environments, and species with distinct ecologies had significantly different probabilities of speciation and extinction. The ensuing macroevolutionary dynamics depend fundamentally on the ecological structure of species’ assemblages. (ABSTRACT)
Ezard, T. H. G., Aze, T., Pearson, P. N., Purvis, A., 2011. Interplay Between Changing Climate and Species’ Ecology Drives Macroevolutionary Dynamics. Science 332 (6027), 349–351.
FORAMINIFERA IN A CORAL REEF AQUARIUM
Live (rose Bengal-stained) benthic foraminifera were studied from one of the largest coral reef aquaria in the world (Burgers’ Ocean, Arnhem, the Netherlands). Benthic foraminifera were unintentionally transported to the aquarium with live rock (i.e., natural reef substratum) from Java and Bali (Indonesia) during initial setup in 2000. After eight years and stabilization of the water chemistry, the foraminifera were found to have successfully colonized this artificial environment. Fifty benthic foraminiferal taxa (>125 µm) were identified in samples from the various subenvironments within the aquarium. The ecological conditions in the aquarium appeared to be optimal for both symbiont-bearing foraminifera and hermatypic corals. Among the four symbiontic foraminiferal species identified, Heterostegina depressa was the most abundant and it was dominant in all samples. Overall, foraminiferal densities in the aquarium were relatively high compared to those in the natural environment emulated. Although foraminifera are not generally recognized as inhabitants of saltwater aquaria, they can play an important ecological role in this type of closed environment. (ABSTRACT)
Ernst, S., Janse, M., Renema, W., Kouwenhoven, T., Goudeau, M-L., Reichart, G-J., 2011. Benthic foraminifera in a large Indo-Pacific coral reef aquarium. The Journal of Foraminiferal Research 41 (2), 101-113.
SPATIAL HOMOGENEITY OF SALT-MARSH FORAMINIFERA
We collected replicate samples at stations placed systematically along a transect at Oregon Inlet (North Carolina, USA) to investigate spatial homogeneity of dead assemblages of salt-marsh foraminifera. ...... As expected, ANOVA’s on all species indicated significant differences among low-, middle-, and high-marsh zones defined by their flora. No significant differences were found between stations in the low- and high-marsh indicating homogeneity in these zones. In contrast, for all six species in the middle-marsh zone, significant outcomes for ANOVA, cluster analysis and post-hoc comparisons suggested that the middle-marsh should be divided into two zones. In addition, two species exhibited a patchy (inhomogeneous) distribution among all stations in the middle marsh. If confirmed by additional studies, our results indicate that sampling of modern salt-marshes to document the distribution of foraminifera for use in sea-level reconstructions should recognize the spatial variability associated with the middle-marsh floral zone. (ABSTRACT)
Kemp, A. C., Buzas, M. A., Horton, B. P., Culver, S. J., 2011. Influence of patchiness on modern salt-marsh foraminifera used in sea-level studies (North Carolina, USA). The Journal of Foraminiferal Research 41 (2), 114-123.
ECOLOGICAL DISTRIBUTION IN A TIDAL LAGOON–BRACKISH LAKE
The shallow subtidal to intertidal sandy mudflats of an unusual, 6 km2, alternating tidal lagoon–brackish lake (Lake Onoke, New Zealand) has a remarkably consistent foraminiferal fauna dominated (>80%) by Miliammina fusca. During intervals when the gravel barrier across its mouth is closed, the salinity in the lake declines and the level may rise to 1 m above the extreme astronomical tide level (EHWS) of the sea outside. A transect of samples through and above the salt marsh on the edge of Lake Onoke identifies three elevation-related foraminiferal zones: M. fusca (up to mid tide level, MSL); M. fusca-Trochamminita salsa (MSL to mean high water level, MHW); and T. salsa-Haplophragmoides wilberti (MHW to 1 m above EHWS). This is the first record of foraminiferal faunas living above EHWS in New Zealand. ...... (ABSTRACT)
Hayward, B. W., Grenfell, H. R., Sabaa, A. T., Kay, J., Clark, K., 2011. Ecological distribution of the Foraminifera in a tidal lagoon brackish late, New Zealand, and its Holocene origins. The Journal of Foraminiferal Research 41 (2), 124–137.
LATE JURASSIC FORAMINIFERA, OFFSHORE WESTERN AUSTRALIA
Foraminifera are recorded from one sample dredged by RV Sonne from 4438–4049 m water depths on the southwestern margin of Wallaby Plateau, eastern Indian Ocean (25.5°S, 108.5°E). An Oxfordian/Kimmeridgian age is estimated based on the foraminiferal fauna, but it conflicts with Early Cretaceous zircon dates that suggest some recycling or mixing during dredging. The Jurassic age is significantly older than any previously known age in the region and predates age estimates for the initiation of seafloor spreading along the Western Australian margin as India departed from Australia/Antarctica during the break-up of Gondwana. ...... It is dominated by Conicospirillina wallabyensis n. sp. (Spirillinacea), Conorboides falveyi n. sp. and Lenticulina muensteri (Roemer, 1839). ...... Descriptions of taxa similar in form to Conicospirillina should be studied under crossed polars to determine whether or not the skeleton has grown in crystallographic continuity. Marginulina suprajurassica Gordon is shown to be pre-occupied. (ABSTRACT)
Quilty, P. G., 2011. Late Jurassic foraminifera, Wallaby Plateau, offshore Western Australia. The Journal of Foraminiferal Research 41 (2), 182–195.
RESPONSE OF BENTHIC FORAMINIFERA TO HEAVY METAL CONTAMINATION
...... we studied foraminifera and metal concentrations in 72 marine sediment samples, collected from the inner shelf along the Sicilian coast (Gulfs of Palermo and Termini) and on the south-eastern coast of Lampedusa Island. ...... On the basis of pollution sources and foraminiferal assemblages, we recognised different zones in the Gulf of Palermo. The most polluted zones showed high metal concentrations, and low diversity of benthic foraminifera with species typical of stressed environments. By contrast, the lowest polluted zones showed a high population density and the highest percentages of epiphytes. Epiphytes were abundant where a Posidonia oceanica meadow was present and decreased in the most polluted zones. Sediments of the Gulf of Termini and Lampedusa exhibited high percentages of benthic foraminifera typical of well-oxygenated waters and low concentrations of metals, with the exception of sites located near sewage outfalls and harbour areas. Furthermore, even though deformed tests are commonly known in natural stressed environmental conditions, this study shows that in the most polluted zones, benthic foraminifera were characterised by the highest percentages of deformed individuals. (ABSTRACT)
Caruso, A., Cosentino, C., Tranchina, L., Brai, M., 2011. Supratidal foraminifera as ecological indicators in anthropically modified wetlands (Lagoon of Venice, Italy). Chemistry and Ecology 27 (1), 9–30.
SUPRATIDAL FORAMINIFERA IN ANTHROPICALLY MODIFIED WETLANDS
...... In this study, the Mazzorbo artificial salt marsh, built during the second half of 1999, is considered. On its surface, 16 samples were collected along a transect line in May 2008 to verify the ecological role of this salting within the lagoon ecosystem. The sediment grain size distribution of the salt marsh reflects the dissipative role of the tide and the effect of sediment transport due to the wave and tidal action. However, the presence of only a few Trochammina individuals shows that the foraminiferal fauna did not recognise this morphology as a salt marsh. The lack of Trochammina colonisation can be related to the excessive elevation of the salt marsh surface. This hypothesis is confirmed by the lack of the salt-tolerant plant Spartina. The unsuccessful colonisation by the foraminifera seems to indicate that this artificial salting does not have the natural dynamism of the intertidal morphologies and it may only be classified as land recovery. The supratidal foraminiferal taxa can act as an ecological indicator: through their observation it is possible to verify whether an artificial salt marsh accomplishes its task of functioning as an ecological unit with the community of organisms. (ABSTRACT)
Serandrei-Barbero, R., Donnici, S., Madriardo, F., in press. Supratidal foraminifera as ecological indicators in anthropically modified wetlands (Lagoon of Venice, Italy). Ecological Engineering, doi:10.1016/j.ecoleng.2011.02.009
CARBONIFEROUS-PERMIAN BIOSTRATIGRAPHY AND PALAEOBIOGEOGRAPHY
Shallow-marine limestones associated to a Palaeotethyan seamount in the Teke Dere unit of the Tavas Nappe (Lycian Nappes, SW Turkey) are essentially latest Moscovian-Kasimovian in age. The wide range of microfauna and -flora of the series show biogeographic affinities comparable to those from the northern Palaeotethyan borders (especially to assemblages from the Carnic Alps, Urals, Donbass and Darvaz). These biogeographic affinities seem to persist until the end of the Early Permian (Artinskian). The Middle Permian fauna is represented by the typical warm, tropical assemblages known at the same time in the Palaeotethys (NW Caucasus, Darvaz, south China, Primorie and Japan), and in the Neotethys (Transcaucasia, central Iran, southern Afghanistan and Sibumasu). The new Kasimovian algae and incertae sedis Novantiellopsis elliottii n. gen. n. sp., Uvanellopsis fluegelii n. gen. n. sp., Tubiphytes rauzerae n. sp. and Asselodiscus davydovi n. sp. are described. (ABSTRACT)
Vachard, D., Moix, P., in press. Late Pennsylvanian to Middle Permian revised algal and foraminiferan biostratigraphy and palaeobiogeography of the Lycian Nappes (SW Turkey): Palaeogeographic implications. Revue de Micropaléontologie, doi:10.1016/j.revmic.2011.02.002
G. menardii cultrata/N. dutertrei ratio and ∂18O
Core-top samples from the eastern tropical Pacific (10°N to 20°S) were used to test whether the ratio between Globorotalia menardii cultrata and Neogloboquadrina dutertrei abundance (Rc/d) and the oxygen isotope composition (δ18O) of planktonic foraminifera can be used as proxies for the latitudinal position of the Equatorial Front. Specifically, this study compares the δ18O values of eight species of planktonic foraminifera (Globigerinoides ruber sensu stricto (ss) and sensu lato (sl), Globigerinoides sacculifer, Globigerinoides triloba, Pulleniatina obliquiloculata, Neogloboquadrina dutertrei, Globorotalia menardii menardii, Globorotalia menardii cultrata and Globorotalia tumida) with the seasonal hydrography of the region, and evaluates the application of each species or combination of species for paleoceanographic reconstructions. ...... Research Highlights ► This study deals with the micropaleontological location of the equatorial front. ► Abundance ratios of G. cultratal N. dutertrei track the EF latitudinal position. ► Δδ18OG.tumida-G.ruber and Δδ18OG.tumida-P.obliquiloculata are also good proxies. ► Reconstruction of the EF based on single species Δδ18O can be achieved by mapping. (ABSTRACT)
Rincón-Martinez, D., Steph, S., Lamy, F., Mix, A., Tiedemann, R., 2011. Tracking the equatorial front in the eastern equatorial Pacific Ocean by the isotopic and faunal composition of planktonic foraminifera. Marine Micropaleontology, Vol. 79 (1-2), 24-40. doi:10.1016/j.marmicro.2011.01.001
STABLE ISOTOPES IN MODERN PLANKTONIC FORAMINIFERA
This study reports on the stable isotopic composition of modern planktonic foraminifera tests collected from plankton tows and sediment trap moorings in the northern South China Sea. Plankton tow samplings were conducted at water depths of 50, 100, and 200 m during various seasons between December 2002 and August 2008. ...... Four common and widely distributed tropical/subtropical planktonic foraminifer species, including Globigerinoides ruber (white variety), Globigerinoides sacculifer (without sac), Neogloboquadrina dutertrei and Pulleniatina obliquiloculata, were analyzed for δ18O and δ13C within narrow shell size ranges and compared with the concurrent sea surface temperature (SST) and wind stress. Our results show that foraminiferal δ18O is primarily influenced by seawater temperature, while δ13C is affected by surface water nutrients, which in this region can be discerned from wind stress data. ...... (ABSTRACT)
Lin, H-L., Sheu, D., D-D., Yang, Y., Chou, W-C., Hung, G-W., in press. Stable isotopes in modern planktonic foraminifera: Sediment trap and plankton tow results from the South China Sea. Marine Micropaleontology, Vol. 79 (1-2), 15-23. doi:10.1016/j.marmicro.2010.12.002
SAME-SPECIMEN MORPHO-GENERIC ANALYSIS OF Truncorotalia truncatulinoides
Genetic analyses of planktonic foraminifera have unveiled significant levels of cryptic diversity, thus calling into question the usefulness of the morphological species concept for paleoceanographic reconstructions. Here, we present single-specimen combined genetic and morphological analyses performed on living Truncorotalia truncatulinoides collected across the world oceans. A combined morphogenetic analysis allows us to (1) detect five different genetic types (Types I to V) within the morphospecies T. truncatulinoides, (2) statistically analyse shape variations among these genotypes, and (3) assess the biogeographic patterns and the links between surface ocean properties and the distribution of morphological and genetic diversity within T. truncatulinoides. ...... Research Highlights ►Same-specimen genetic and morphological analyses in the foraminifer T. truncatulinoides ►Global scale geographic distribution of the T. truncatulinoides morpho-genotypes ►Genotypes adapted to different water masses exhibit differences in shell morphology ►Morpho-genetic diversity in T. truncatulinoides can be used as a paleoceanographic proxy (ABSTRACT)
Quillévéré, F., Morard, R., Escarguel, G., Douady, C. J., Ujiié, Y., de Garidel-Thoron, T., de Vargas, C., in press. Global scale same-specimen morpho-genetic analysis of Truncorotalia truncatulinoides: A perspective on the morphological species concept in planktonic foraminifera. Palaeogeography, Palaeoclimatology, Palaeoecology, doi:10.1016/j.palaeo.2011.03.013
CONTRIBUTIONS OF MOLECULAR PHYLOGENETICS TO FORAMINIFERAL TAXONOMY
Molecular phylogenetics gives new insights into the taxonomy of foraminifera, independent of their morphology. After a survey of the present knowledge on how molecular phylogeny can contribute to foraminiferal taxonomy, we present an applied example. The comparison of ribosomal DNA (rDNA) sequences belonging to the SSU (Small Subunit) and LSU (Large Subunit) genes of Pseudoeponides falsobeccarii with other similar sequences of rotaliids available in GenBank shows that this species actually belongs to the genus Ammonia, because it groups inside the other Ammonia sequences instead of forming a distinct clade. Moreover, Ammonia falsobeccarii forms a clade well separated from other Ammonia phylotypes, meaning that it can be considered as a distinct species, and not as an ecophenotype of one of the other Ammonia species. (ABSTRACT)
Schweizer, M., Jorissen, F., Geslin, E., in press. Contributions of molecular phylogenetics to foraminiferal taxonomy: General overview and example of Pseudoeponides falsobeccarii Rouvillois, 1974. Computes Rendus Palevol, doi:10.1016/j.crpv.2011.01.003
QUATERNATY PALEOENVIRONMENTS IN THE CENTRAL ALBEMARLE EMBAYMENT
To understand the temporal and spatial variation of eustatic sea-level fluctuations, glacio-hydro-isostacy, tectonics, subsidence, geologic environments and sedimentation patterns for the Quaternary of a passive continental margin, a nearly complete stratigraphic record that is fully integrated with a three dimensional chronostratigraphic framework, and paleoenvironmental information are necessary. The Albemarle Embayment, a Cenozoic regional depositional basin in eastern North Carolina located on the southeast Atlantic coast of the USA, is an ideal setting to unravel these dynamic, interrelated processes. ...... Research highlights ►Foraminifera, diatoms and pollen as paleoenvironmental indicators. ►Quaternary paleoenvironments range from mid-shelf to fluvial. ►Quaternary sediments reflect eastward progradation of the shelf. ►Marginal marine deposits are preserved only in paleovalleys. (ABSTRACT)
Culver, S. J., Farrell, K. M., Mallinson, D. J., Willard, D. A., Horton, B. P., Riggs, S. R., Thieler, E. R., Wehmiller, J. F., Parham, P., Snyder, S. W., Hillier, C., in press. Micropaleontologic record of Quaternary paleoenvironments in the Central Albemarle Embayment, North Carolina, U.S.A.. Palaeogeography, Palaeoclimatology, Palaeoecology, doi:10.1016/j.palaeo.2011.03.004
SPECIES' DELIMITATION IN MULTIDIMENTIONAL MORPHOSPACE
BACKGROUND The species is a fundamental unit of biological pattern and process, but its delimitation has proven a ready source of argument and disagreement. Here, we discuss four key steps that utilize statistical thresholds to describe the morphological variability within a sample and hence assess whether there is evidence for one or multiple species. Once the initial set of biologically relevant traits on comparable individuals has been identified, there is no need for the investigator to hypothesise how specimens might be divided among groups, nor the traits on which groups might be separated. ...... CONCLUSION By estimating variance robustly (samples containing incipient species are unlikely to be scaled optimally by means and standard deviations) and identifying thresholds relevant to a particular system rather than universal standards, the steps of the framework aim to optimize the chances of delineation without imposing pre-conceived patterns onto estimates of species limits. (ABSTRACT)
Ezard, T. H. G., Pearson, P. N., Purvis, A., 2010. Algorithmic approaches to aid species' delimitation in multidimensional morphospace. BMC Evolutionary Biology, 10 (1), 175, DOI: 10.1186/1471-2148-10-175
MICROHABITATS AND BENTHIC FORAMINIFERAL SHELL GEOCHEMISTRY
Loubere, P., Jacobson, B., Kristensen, D. K., Husum, K., Jernas, P., Richaud, M., in press. The structure of benthic environments and the paleochemical record of foraminifera. Deep Sea Research Part I: Oceanographic Research Papers, doi:10.1016/j.dsr.2011.02.011
SALT-MARSH FORAMINIFERA AS SEA LEVEL PROXY
Research Highlights ►Salt-marsh foraminifera can be used to reconstruct sea-level changes in Tasmania. ►Sea-level reconstructions are possible with a precision of ± 0.10 m. ►The foraminifera Trochamminita salsa and Trochamminita irregularis are distinguished. ►WA-PLS regression models are more reliable than PLS regression models. ►Sea-level reconstructions are most precise along microtidal coastlines. (ABSTRACT)
Callard, S. V., Gehrels, W. R., Morrison, B. V., Grenfell, H. R., in press. Suitability of salt-marsh foraminifera as proxy indicators of sea level in Tasmania. Marine Micropaleontology, doi:10.1016/j.marmicro.2011.03.001
Orbulina AND Praeorbulina-LIKE SPECIMENS IN LATE GLACIAL SEDIMENTS
Rossignol, L., Eynaud, F., Bourget, J., Zaragosi, S., Fontanier, C., Nadine, E-Z., Lanfumey, V., in press. High occurrence of Orbulina suturalis and “Praeorbulina-like specimens" in sediments of the Northern Arabian Sea during the Last Glacial Maximum. Marine Micropaleontology, doi:10.1016/j.marmicro.2011.01.006
THE UNCERTAINTY OF TAXA RELATIVE ABUNDANCES
Heslop, D., De Schepper, S., Proske, U., in press. Diagnosing the uncertainty of taxa relative abundances derived from count data. Marine Micropaleontology, doi:10.1016/j.marmicro.2011.01.007
ENCRUSTING FORAMINIFERA ON EXPERIMENTAL SHELLS
RICHARDSON-WHITE, S., WALKER, S. E., in press. Diversity, taphonomy and behavior of encrusting foraminifera on experimental shells deployed along a shelf-to-slope bathymetric gradient, lee stocking island, Bahamas . Palaeogeography, Palaeoclimatology, Palaeoecology, doi:10.1016/j.palaeo.2011.02.021
OTTNANGIAN PALAEOENVIRONMENTS IN THE ALPINE FORELAND BASIN
Highlights ►The publication indicates palaeobiogeographic and palaeoenvironmental differences within the North Alpine Foreland Basin during the Ottnangian. ►It is shown that specific palaeoenvironmental zones existed in the North Alpine Foreland Basin during the Ottnangian. ►Furthermore, the new data from the borehole Stockhausen provide the opportunity to correlate the Ottnangian lithostratigraphic units of the Western Molasse with those from the Eastern Molasse. (ABSTRACT)
Pippèrr, M., in press. Characterisation of Ottnangian (middle Burdigalian) palaeoenvironments in the North Alpine Foreland Basin using benthic foraminifera - a review of the Upper Marine Molasse of southern Germany. Marine Micropaleontology, doi:10.1016/j.marmicro.2011.02.002
LATEST CRETACEOUS FORAMINIFERA IN UPWELLING REGION
Highlights ►This study documents the paleoceanography of the L. Cretaceous Oil Shale, Negev Israel ►The Oil Shale Mbr (OSM) spans between 71.6 -69.85 Ma based on foraminiferal zonation ►5 benthic and planktic foraminiferal assemblages (B and P Types) were distinguished ►Upward changes in B and P Types correlate with a decrease in TOC content ►These changes mark the weakening of the L. Cretaceous Tethyan upwelling system. (ABSTRACT)
Ashckenazi-Polivoda, S., Abramovich, S., Almogi-Labin, A., Schneider-Mor, A., Feinstein, S., Püttmann, W., Berner, Z., in press. Paleoenvironments of the latest Cretaceous oil shale sequence, Southern Tethys, Israel, as an integral part of the prevailing upwelling system. Palaeogeography, Palaeoclimatology, Palaeoecology, doi:10.1016/j.palaeo.2011.02.018
RESPONSE OF EOCENE FORAMINIFERA TO VOLCANIC ASH FALL
Waśkowska, A, in press. Response of Early Eocene deep-water benthic foraminifera to volcanic ash falls in the Polish Outer Carpathians: Palaeocological implications. Palaeogeography, Palaeoclimatology, Palaeoecology, doi:10.1016/j.palaeo.2011.02.012
FORAMINIFERA FROM THE BLAKE RIDGE AND NEOGEN PALEOCEANOGRAPHY
Bhaumik, A. K., Gupta, A. K., Thomas, E., in press. Blake outer ridge: Late Neogene variability in Paleoceanography and deep-sea biota. Palaeogeography, Palaeoclimatology, Palaeoecology, doi:10.1016/j.palaeo.2011.02.004
EFFECT OF OCEAN ACIDIFICATION ON CALCIFICATION
Fujita, K., Hikami, M., Suzuki, A., Kuroyanagi, A., Kawahata, H.,2011. Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers. Biogeosciences Discuss 8, 1809-1829
COLD-WATER CORALS AND FORAMINIFERA ON MUD VOLCANOES
Margreth, S., Gennari, G., Rüggeberg, A., Comas, M. C., Pinheiro, L. M., Spezzaferri, S., in press. Growth and demise of cold-water coral ecosystems on mud volcanoes in the West Alboran Sea: The messages from the planktonic and benthic foraminifera. Marine Geology, doi:10.1016/j.margeo.2011.02.006
EVOLUTION OF THE EARLY SCHUBERTELLID FUSULINIDS
Davydov, V. I., 2011. Taxonomy, nomenclature, and evolution of the early schubertellid fusulinids. Acta Palaeontologica Polonica 56 (1), 181-194.
PALEOCENE-EOCENE LARGER BENTHIC FORAMINIFERA
Afzal, J., Williams, M., Leng, M. J., Aldridge, R. J., Stephenson, M. H., 2010. Evolution of Paleocene to Early Eocene larger benthic foraminifer assemblages of the Indus Basin, Pakistan. Lethaia, DOI: 10.1111/j.1502-3931.2010.00247.x
PaleoBase: DEEP-SEA BENTHIC FORAMINIFERA
Holbourn, A., Henderson, A., May 2011. PaleoBase: Deep Sea Benthic Foraminifera [Software]. Wiley-Blackwell.