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764 results for “foraminifera”
Fig. 10 in Some New And Poorly Known Benthic Foraminifera From Late Maatrichtian Shallow-Water Carbonates Of The Zagros Zone, Sw Iran
Fig. 10 Fleuryana adriatica De Castro, Drobne & Gušić, Late Maastrichtian Tarbur Formation of Mandegan section, Zagros Zone, SW Iran. a, f Equatorial sections. b–c Oblique sections. d Broken oblique section. e Axial section. Thin-sections: Rt 87 (a), SNSB-BSPG 2016 III-7 (b–c), Rt 82 (d), Rt 68 (e), Rt 70 (f).
Fig. 1 in Some New And Poorly Known Benthic Foraminifera From Late Maatrichtian Shallow-Water Carbonates Of The Zagros Zone, Sw Iran
Fig. 1 Lithostratigraphy of the Late Cretaceous of the Zagros Zone, Iran (excerpt and redrawn from the Stratigraphic Chart of Iran published by the Geological Society of Iran in 1995).
Fig. 8 in Some New And Poorly Known Benthic Foraminifera From Late Maatrichtian Shallow-Water Carbonates Of The Zagros Zone, Sw Iran
Fig. 8 Stratigraphic distribution and general comparison of Accordiella conica Farinacci, Accordiella? tarburensis n. sp., and Pseudoaccordiella ayaki Gallardo-Garcia & Serra-Kiel, (from Serra-Kiel et al., 2016, fig. 30.3 and 30.7).
Fig. 13 in Some New And Poorly Known Benthic Foraminifera From Late Maatrichtian Shallow-Water Carbonates Of The Zagros Zone, Sw Iran
Fig. 13 Spirolina? farsiana n. sp., Late Maastrichtian Tarbur Formation of Mandegan section, Zagros Zone, SW Iran. a Oblique equatorial section of specimen with uncoiled adult part. b Slightly oblique equatorial section with few uncoiling chambers; holotype specimen. c Subaxial section: Note changing growth direction of enrolled part. d Detail of e showing foramina with lip-like projections. e, f "Axial" section of the uncoiled part. g–h Subaxial sections. Note teeth-like projections in g (arrow). i, fragmentary oblique section. Thin-sections: Rt 67-3 (a, e–d), Rt 67-2 (b, h), SNSB-BSPG 2016 III-1 (c, g, i), SNSB-BSPG 2016 III-8 (f).
Fig. 16 Lamellar perforate foraminifera Laffiteina monodi Marie. a in Some New And Poorly Known Benthic Foraminifera From Late Maatrichtian Shallow-Water Carbonates Of The Zagros Zone, Sw Iran
Fig. 16 Lamellar perforate foraminifera Laffiteina monodi Marie. a Oblique section, thin-section Rt 100-2. b Subaxial section, thin-section Rt 90.
Fig. 15 Pseudonummoloculina kalantarii n in Some New And Poorly Known Benthic Foraminifera From Late Maatrichtian Shallow-Water Carbonates Of The Zagros Zone, Sw Iran
Fig. 15 Pseudonummoloculina kalantarii n. sp., Late Maastrichtian Tarbur Formation of Naghan section, Zagros Zone, SW Iran. a–b Equatorial sections. c–d, f–g, j Oblique sections. e, h–i, k Oblique axial to subaxial sections. l–n Details from i–k showing notched aperture in the last whorls. Holotype specimen in k (detail in n). Notched apertures are also discernible in d and f (arrows), and a?. Thin-sections: TB 82 (a), NG 81 (b), NG 83 (c, h–i, l), NG 86 (d), NG 83-2 (e–f, j, m), NG 85 (g, k, n).
Fig. 4 in The phanerozoic diversity of agglutinated foraminifera: Origination and extinction rates
Fig. 4. Per−capita (A) and percent (B) extinction rates of agglutinated foraminiferal genera over the Phanerozoic, compared with the "Big−5" mass extinctions of Sepkoski (1984).
Foraminifera test and pseudopoda
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Linked collectors and determiners for: Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia.
Natural history specimen data linked to collectors and determiners held within, "Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/0087fa4c-a4f0-45d9-a2de-d433d7885753">https://bionomia.net/dataset/0087fa4c-a4f0-45d9-a2de-d433d7885753</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/0087fa4c-a4f0-45d9-a2de-d433d7885753">https://gbif.org/dataset/0087fa4c-a4f0-45d9-a2de-d433d7885753</a>. Formatted as a Frictionless Data package.
Planktonic foraminifera-bound d15N data for "Ocean iron fertilization by sea-level enhanced mid-ocean ridge volcanism "
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Carbon and oxygen isotope data of foraminifera in coral reef regions
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Late Cenozoic sediments and foraminifera counts from the western continental shelf of South Africa
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Data from: A geographic test of species selection using planktonic foraminifera during the Cretaceous/Paleogene mass extinction
Species selection has received a great deal of theoretical attention but it has rarely been empirically tested. It is important to determine the level of selection that operated during a particular extinction event because it can help distinguish between traits that were actually responsible for extinction and those that were merely correlated with it. Here, we present a test that can help distinguish between organismal and species-level selection, which we demonstrate using the high-resolution fossil record of planktonic foraminifera species recorded in deep-sea sediment cores. Our test examines the fate of survivors and victims during the Cretaceous/Paleogene (K/Pg) mass extinction within single geographic regions, where all individuals experience the same selection pressures. Selection at the organismal level implies that individual members of surviving species are more fit than those of victimized species, and therefore should be more likely to survive in affected areas; conversely, selection at the species level implies individuals will suffer equally within an affected area. We find that survivors of the mass extinction suffered very high extirpation rates in cores where the overall extinction rate was high, indicating that individual members of the surviving species were generally no more fit than individual members of extinct species. Rather, these species were able to survive because they possessed advantageous species-level traits, such as larger geographic ranges and greater abundances than victimized species. This geographic pattern of extirpation suggests that selection operated at the species, rather than organismal, level during the K/Pg mass extinction of planktonic foraminifera.
FIGURE 4 in New species of Leptohalysis (Rhizaria, Foraminifera) from an extreme hadal site in the western Pacific Ocean
FIGURE 4: Leptohalysis sp. 2, photographed using transmitted light. Scale bar = 50 µm.
Figure 13 in New and little-known Komokiacea (Foraminifera) from the bathyal and abyssal Weddell Sea and adjacent areas
Figure 13. Ipoa pennata sp. nov. Specimens photographed in glycerol using transmitted light. A, Stn 102#8, general view; B, Stn 88#8, general view; C, D, same specimen, details of tubules and side branches; E- F, Stn 102#13, general views.
Figure 5. Septuma brachyramosa Kamenskaya, 1993. A, Stn 78 in New and little-known Komokiacea (Foraminifera) from the bathyal and abyssal Weddell Sea and adjacent areas
Figure 5. Septuma brachyramosa Kamenskaya, 1993. A, Stn 78#9, general view, transmitted light; B, Stn 16#11, general view, reflected light; C, same specimen, detail of tubule with septum (arrowed); D, Stn 78#9, upper two specimens without sediment between tubules, lower two specimens with sediment filling between tubules; E, Stn 78#9, detail of tubule with septa (arrowed); F, Stn 52#7, general view of specimen with long, non-septate tubule; G, same specimen, detail of tubule with septum (arrowed).
Figure 12 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 12. Resigella bilocularis sp. nov. Scanning electron micrographs. A, general view; note collapsed initial chamber. B, detail of same specimen showing agglutinated coating of organic wall; note that the grains become more prominent towards proximal part of chamber. C–H, damaged specimen; the initial chamber has been lost. C, general view; areas within boxes are shown in more detail in E–H. D, surface of proximal part of chamber showing agglutinated grains. E, surface towards posterior end of chamber showing agglutinated grains and smoother, intervening areas; box indicates area shown in detail in F. F, detail of organic wall with mesh-like structures and a few flat areas. G, H, surface towards distal part of chamber showing smooth, flake-like features separated by areas with a fine, mesh-like structure. The flake-like features in F–H are probably clay particles.
Figure 13 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 13. Resigella bilocularis sp. nov. Scanning electron micrographs. A, aperture of specimen shown in Figure 12C. B, general view of specimen with intact intial chamber and broken second chamber. C, D, broken cross-section of test wall showing organic layer overlain by agglutinated grains. E, F, general view of test and detail of organic surface with flake-like features (probably clay particles) separated by mesh-like structures.
Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2
<p>These data include bulk carbonate calcium, oxygen and carbon isotope data from Gubbio, Italy and the Angus Aristocrat Core from the Western Interior Seaway in Colorado, USA as well as foraminiferal calcium, oxygen and carbon isotope data from Gubbio, Italy. All calcium isotope data were generated using a high-precision Thermal Ionization Mass Spectrometer method. Carbon and oxygen isotope data were generated using an Isotope Ratio Mass Spectrometer.</p>
FIG. 31. — A, Laevilagena guttaformis n. gen., n in The species of Lageninae Brady, 1881 (Foraminifera) from the Pliocene-Early Pleistocene of north-western France, Fécamp (Seine-Maritime, France) and St Erth (Cornwall, United Kingdom)
FIG. 31. — A, Laevilagena guttaformis n. gen., n. sp., la Groussinière, enlargement of the aboral tube; B, C, Laevilagena pyriformis n. gen., n. sp., la Groussinière (MNHN.F.F67645): B, basal internal view; C, enlargement of the aboral tube; D, E, Lagena atilai Bertels, 1964, Fécamp: D, basal internal view; E, enlargement of the aboral tube; F, G, Lagena buchneri n. sp., LRK2: F, longitudinal section showing the aboral tube; G, enlargement of the aboral tube; H, I, Lagena digitale (Heron-Allen & Earland, 1932), la Chênelière (MNHN.F.F67653): H, basal internal view; I, enlargement of the the aboral tube; J, K, Lagena haidingeri (Cžjžek, 1848), la Bouillonnaie (MNHN.F.F67748): J, basal internal view; K, enlargement of the aboral tube; L, M, Lagena mariae Karrer, 1877, la Pugle (MNHN.F.F67751): L, basal internal view; M, enlargement of the aboral tube; N, O, Lagena ornaticollis Jones, 1984, n. stat., la Groussinière (MNHN.F.F67752): N, basal internal view; O, enlargement of the aboral tube; P, Lagena striata (d'Orbigny, 1839), SGB3, basal internal view. Scale bars: A, E, O, 10 µm; B, D, J, L, N, P, 100 µm; C, G, I, K, M, 20 µm; H, 200 µm.
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