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Miliolacea
Biostratigraphic investigations assisted by virtual outcrop modeling: a case study from an Eocene shallow-water carbonate succession (Val Rosandra gorge, Trieste, NE Italy)
Reply to Comment on “Larger Benthic Foraminifera and Microfacies of Late Paleocene - Early Eocene Sections in Meghalaya, Northeast India” by Hadi, M. (2022)
Stable Isotopic Variability in Individual Benthic Foraminifera from the Continental Shelf of Tropical Brazil
Comment on “Larger Benthic Foraminifera and Microfacies of Late Paleocene - Early Eocene Sections in Meghalaya, Northeast India” by Pereira et al. (2022)
Seasonal Distribution of Benthic Foraminifera Associated with the Marine Sponge Liosina Paradoxa Thiele, 1899 at Sandspit Backwaters, Karachi, Pakistan
A quest for perfection in science and art: The paleontological legacy of Manfred Reichel (1896–1984)
ABSTRACT Professor of paleontology at the University of Basel, Switzerland, Manfred Reichel was as much an accomplished scientist as a talented artist. Skilled in mental 3-D-visualization, aided by a sharp memory, and with a fine hand for illustration, he introduced comparative anatomy to the study of foraminifera, which is masterly illustrated in his analysis of Alveolinids, and used his knowledge of locomotion in modern birds as an actualistic method for portraying flying reptiles. Teaching was his motivation, and to aid his classes, beyond multiple drawings, he created a large number of scaled structural models of foraminifera and a life-size wooden replica of the Pteranodon with mobile articulations. Manfred Reichel was a perfectionist who left a large part of his studies and drawings unpublished.
Effects of Varied Temperature and Salinity on Assemblages of Foraminifera Grown with Exposure to Heavy-Metal Pollutants (Nickel and Zinc)
On Replicates for Comparing Species Densities in Space and Time
Response of Intertidal Foraminiferal Assemblages to Salinity Changes in a Laboratory Culture Experiment
ABSTRACT The Guerrero-Morelos carbonate platform (southwestern Mexico) is one of the rare platforms that persisted throughout the Cenomanian–Turonian oceanic anoxic event 2 (OAE 2). Two sections from this carbonate platform exhibit the typical δ 13 C positive excursion characterizing the OAE 2. This enables the precise distribution of larger benthic foraminifers and their biotic response to paleoenvironmental changes to be characterized during this event. At Axaxacualco, oligotrophic conditions prevailed during the δ 13 C positive excursion in the distal part of the carbonate platform. In the more proximal part, at Barranca del Cañon, OAE 2 impact was more significant and is marked by thick laminated microbialite deposition, indicating mesotrophic conditions. Low phosphorus and trace-element contents confirm the persistence of oligotrophic to mesotrophic conditions throughout OAE 2 in the Central Mexico carbonate platform despite the proximity of the Caribbean-Colombian oceanic plateau. Before the δ 13 C positive excursion, which characterizes the OAE 2, the microfauna assemblage was well diversified, including corals, rudists, and large benthic foraminifera ( Pseudorhapydionina chiapanensis , Pseudorhapydionina dubia , Cuneolina parva , Dicyclina sp., Chrysalidina gradata , and large miliolids). During the δ 13 C positive excursion, significant biotic changes occurred, with increasing dominance of organisms adapted to high-stress conditions. Endobenthic assemblages such as Nezzazatinella sp. and Nezzazata sp. were still present. The green symbiotic benthic foraminifera nearly disappeared, except C. parva and Dicyclina sp. During the basal Turonian, the carbonate platform returned to a more open and oxygenated environment, with the reappearance of pre-OAE microfauna, but without the large benthic foraminifera, which did not survive. The definitive drowning of the Guerrero-Morelos carbonate platform took place after the early Turonian, well above the end of the δ 13 C shift. The deposition of black shale and turbidites, which indicate deeper, anoxic environments, precluded large benthic foraminifera reestablishment. Correlation with the pelagic environments of the Eastbourne section (UK) reveals a synchronicity of biotic responses between basin and platform environments. Low-oxygen conditions are marked by multiple blooms of Heterohelix species in the basin, corresponding to an assemblage dominated by ? Decastronema , Thaumatoporella , and Istriloculina on the carbonate platforms.
The Effects of Selected Heavy Metal Elements (arsenic, Cadmium, Nickel, Zinc) On Experimentally Grown Foraminiferal Assemblages from Sapelo Island, Georgia and Little Duck Key, Florida, U.S.A.
Ilerdian–cuisian Alveolinids from the Western Alborz and Eastern Iran Zones: Systematic and Biostratigraphic Implications
The Effect of Temperature and Food Concentration On Ingestion Rates of Quinqueloculina Seminula On the Diatom Nitzschia Closterium
Comparison of Different Dna Preservation Methods On Quinqueloculina Spp. (foraminifera, Miliolida)
Tarburina zagrosiana n. gen., n. sp., a new larger benthic porcelaneous foraminifer from the late Maastrichtian of Iran
Early Eocene Calcareous Algae and Benthic Foraminifera from Meghalaya, NE India: A New Record of Microfacies and Palaeoenvironment
RESPONSE OF THE MILIOLID ARCHAIAS ANGULATUS TO SIMULATED OCEAN ACIDIFICATION
Larger Foraminiferal Biostratigraphy of Early Paleogene Sections in India
Abstract: Early Paleogene larger foraminifera are widely known from Indian basins. A brief review of earlier studies from Indian basins is presented. The review indicates that some species reported earlier in this interval need taxonomic revision. Additional new data on age diagnostic foraminiferal species from the subsurface section is presented and illustrated in the study. Nearly 60 species including 2 new species ( Alveolina lukashottingeri and Nemkovella bprkrishna ) belonging to 15 genera are presented. Reports on many of these species are not yet known from this region. This study on larger foraminifers from the subsurface sections with stratigraphic ranges can serve as a useful reference wherein a larger foraminiferal assemblage recorded in a subsurface sample can be placed in the stratigraphic column with greater confidence. Based on the distribution of larger foraminifers, the prevalence of carbonates and associate facies deposition in the Indian basins can be correlated broadly to Tethyan Shallow Benthic Zones SBZ 3- 4 (Thanetian, Late Paleocene, P4 – P5; Ta1); SBZ 8 – 11; (Ypresian, early Eocene, P7 – P9; Ta2) SBZ 14 – 15 (Lutetian, Middle Eocene, P11 – P12; Ta3); SBZ 15 – 17 (Bartonian, Middle Eocene, P12 – P14; Ta3) and SBZ 19 – 20 (Priabonian,Late Eocene, P16 – P17; Tb).