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764 results for “foraminifera”
FIG. 4. — A, B 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. 4. — A, B, Deuteralagena sp. C, Fécamp (MNHN.F.F67615), lateral and basal views; C-F, Deuteralagena sp. D, Auxais (MNHN.F.F67616): C, lateral view; D, pores; E, F, oral and basal views; G-J, Deuteralagena sp. E, la Pugle (MNHN.F.F67617): G, lateral view; H, pores; I, J, oral and basal views; K-M, Deuteralagena sp. F, SGB3 (MNHN.F.F67618) in lateral, oral and basal views; N-P, Deuteralagena sp. G, la Groussinière (MNHN.F.F67619) in lateral, oral and basal views. Scale bars: A, B, E, F, G, I, J, K, L, M, O, P, 100 µm; C, N, 200 µm; D, 5 µm; H, 50 µm.
FIG. 2. — A-G, Deuteralagena elegans 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. 2. — A-G, Deuteralagena elegans n. gen., n. sp., Auxais: A-C, holotype in lateral,oral and basal views (MNHN.F.F67607);D-G, paratype,Auxais (MNHN.F.F67608); D, lateral view; E, pores; F, G, oral and basal views; H-P, Deuteralagena laguncula n. gen., n. sp.: H-L, holotype, Auxais (MNHN.F.F67609); H, lateral view, I, pores; J, K, oral views; L, basal view; M-O, paratype, Auxais (MNHN.F.F67610) in lateral, oral and basal views; P, paratype, Auxais (MNHN.F.F67611), in lateral view. Scale bars: A, D, H, M, P, 200 µm; B, C, F, G, I, J, L, N, O, 100 µm; I, K, 20 µm; E, 10 µm.
FIG. 14. — A-H 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. 14. — A-H, Lagena haidingeri (Cžjžek, 1848): A, B, l'Épinay (MNHN.F.F67659); oral and basal views; C-E, St. Erth (MNHN.F.F67660), lateral, oral and basal views; F-H, la Pugle (MNHN.F.F67661), lateral, oral and basal views of a specimen with broken neck; H-K, Lagena mariae Karrer, 1877, la Sautré (MNHN.F.F67662) in lateral, oral and basal views; L-O, Lagena ornaticollis Jones, 1984, n. stat., St. Erth (MNHN.F.F67663): L, lateral view; M, perforated wall; N, perforated wall of the neck. Scale bars: A, B, D, E, G, J, K, O, 100 µm; C, F, I, L, 200 µm; H, 50 µm; M, 5 µm; N, 10 µm.
FIG. 1 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. 1. — Maps of location of the studied samples: A, concerned geographical zones and location of the samples from St. Erth and Fécamp; B, location of the samples from Elorn channel; C, location of the samples from ligerian channel; D, location of the samples from the Carentan basin.
FIG. 29. — A-H, Verulagena turgida 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. 29. — A-H, Verulagena turgida n. gen., n. sp.: A-D, la Sautré, holotype (MNHN.F.F67728): A, lateral view; B, perforated wall; C, D, oral and basal views; E-H, l'Épinay, paratype (MNHN.F.F67729): E, lateral view; F, perforated wall; G, H, oral and basal views; I-L, Verulagena sp., la Pugle (MNHN.F.F67730): I, lateral view; J, perforated wall; K, L, oral and basal views; M, N, Deuteralagena elegans n. gen., n. sp., Auxais: M, basal internal view; N, enlargement of the aboral tube; O, P, Deuteralagena laguncula n. gen., n. sp., Auxais: O, basal internal view; P, enlargement of the aboral tube. Scale bars: A, E, I, 200 µm; B, F, J, P, 20 µm; C, D, G, H, K, L, M, O, 100 µm; N, 10 µm.
FIG. 11. — A, Laevilagena pyriformis 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. 11. — A, Laevilagena pyriformis n. gen., n. sp., Mernel, paratype, Mernel (MNHN.F.F67644), basal view; B-D, paratype, la Groussinière (MNHN.F.F67645) lateral, oral and basal views; E-H, Laevilagena sp., la Groussinière (MNHN.F.F67646): E, lateral view; F, pores; G, H, oral and basal views; I-P, Lagena atilai Bertels, 1964: I-L, Fécamp (MNHN.F.F67647-67650); I, lateral view; J, pores; K, L, oral and basal views; M-O, lateral, oral and basal views; P, internal oral view. Scale bars: A, C, D, G, H, K-P, 100 µm; B, E, I, 200 µm; F, 20 µm; J, 5 µm.
FIG. 15. — A-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. 15. — A-N, Lagena ornaticollis Jones, 1984, n. stat.: A, St. Erth (MNHN.F.F67664), basal view; B-D, Mernel, lateral, oral and basal views; E-H, Mernel (MNHN.F.F67665): E, lateral view, F, perforated wall; G, H, oral and basal views; I-K, Fécamp (MNHN.F.F67666) in lateral, oral and basal views; L-N, SNP (MNHN.F.F67667) in lateral, oral and basal views; O, P, Lagena striata (d'Orbigny, 1839), SGB3 (MNHN.F.F67668), lateral and oral views. Scale bars: A, C, D, G, H, J, K, M-P, 100 µm; B, E, I, L, 200 µm; F, 10 µm.
FIG. 13. — A-D 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. 13. — A-D, Lagena digitale Heron-Allen & Earland, 1932: A, l'Épinay (MNHN.F.F67654), basal view; B-D, SGB3 (MNHN.F.F67655), lateral, oral and basal views; E-P, Lagena haidingeri (Cžjžek, 1848): E-L, Brest-LRK2 (MNHN.F.F67656, F67657): E, lateral view; F, perforated wall; G, perforated wall of the neck; H, I, oral and basal views; J-L, lateral, oral and basal views; M-O, l'Épinay (MNHN.F.F67658), lateral, oral and basal views; P, lateral view. Scale bars: A, C, D, H, I, K, L, N, O, 100 µm; B, E, J, M, P, 200 µm; F, G, 5 µm.
FIG. 24. — A-C, Lanternalagena novocrassicarinata 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. 24. — A-C, Lanternalagena novocrassicarinata n. gen., n. sp., la Groussinière, paratype (MNHN.F.F67707) in lateral view with neck without ornamentation, oral and basal views; D-G, Lanternalagena sp. A, SSL (MNHN.F.F67708): D, lateral view; E, F, oral view and enlargement; G, basal view; H-L, Lanternalagena sp. B, Mernel (MNHN.F.F67709): H, lateral view; I, perforated wall; J, perforated wall on the neck; K, L, oral and basal views; M-O, Lanternalagena sp. C, la Chênelière (MNHN.F.F67710) in lateral, oral and basal views with cracked neck. Scale bars: A, E, J, K, N, 200 µm; B, D, H, I, L, O, P, 100 µm; C, F, G, M, 20 µm.
FIG. 21. — A-M 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. 21. — A-M, Lagunculella flexa (Cushman & Gray, 1946), n. comb.: A, SSL (MNHN.F.F67693), basal view; C-F, la Chênelière (MNHN.F.F67694): C, lateral, D, enlargement neck; E, F, oral and basal views; G-J, la Sautré (MNHN.F.F67695): G, lateral view; H, perforated wall; I, J, oral and basal views; K-M, la Pugle (MNHN.F.F67696) in lateral, oral and basal views; N-P, Lagunculella ovoidea n. gen., n. sp., la Pugle, holotype (MNHN.F.F67697) in lateral, oral and basal views. Scale bars: A, B, I, J, N, O, P, 100 µm; C, E, F, G, K, 200 µm; D, L, M, 50 µm; H, 20 µm.
FIG. 18. — A-D 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. 18. — A-D, Lagena sulcata (Walker & Jacob,1798), SGB3 (MNHN.F.F67678): A, lateral view; B, perforated wall; C, D, oral and basal views; E-G, Lagena torquiformis Haynes, 1973, SGB3 (MNHN.F.F67679) in lateral, oral and basal views; H-P, Lagena variokoreana n. sp., Brest-LRK2: H-K, holotype (MNHN.F.F67680): H, lateral view; I, perforated wall; J, K, oral and basal views; L, specimen with broken neck; M-O, paratype (MNHN.F.F67681), lateral, oral and basal views; P, internal view. Scale bars: A, E, H, L, M, 200 µm; B, 20 µm; C, D, F, G, J, K, N-P, 100 µm; I, 5 µm.
Benthic and Planktic Foraminifera Counts from Concession 20D on the Orange Shelf, South Africa.
<p>Benthic and planktic foraminifera counts from three vibracores within Concession 20D on the Orange Shelf of western South Africa. The vibracores from which foraminifera were subsampled include inner shelf core 12820D, outer shelf core 14820D, and outer shelf core 14620D. Counts are presented as absolute abundances and were counted to a 300-300 benthic-planktic threshold. Where this threshold could not be met, the total amount of benthic and planktic foraminifera for all sampled sediment was noted. </p>
Dinoflagellate cysts and benthic foraminifera from surface sediments of Svalbard fjords and shelves as paleoenvironmental indicators
<p>Supplementary Table 1. Seasonally averaged sea-ice cover, SST and SSS data used for the multivariate statistical analysis.</p> <p>Supplementary Table 2. Relative abundances of individual dinoflagellate cyst taxa, total cyst concentration [cysts g<sup>-1</sup>], and relative abundance of auto- and heterotrophic cysts at each station.</p> <p>Supplementary Table 3. Relative abundances of individual benthic foraminifera taxa, total benthic foraminifera concentration [forams g<sup>-1</sup>], and relative abundance of calcareous and agglutinated benthic foraminifera at each station.</p>
Morphology of Pulleniatina (planktonic foraminifera): Micro-CT internal volumes
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3DKMI: A MATLAB package to generate shape signatures from Krawtchouk moments and an application to species delimitation in planktonic foraminifera
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Data From: Forabot: Automated Planktic Foraminifera Isolation and Imaging
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Global diversity patterns of larger benthic foraminifera under future climate change
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Data from: An extinction event in planktonic Foraminifera preceded by stabilizing selection
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Data from: Drivers of global pre-industrial patterns of species turnover in planktonic foraminifera
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Data from: Environmental influence on growth history in marine benthic foraminifera
Energy availability influences natural selection on the ontogenetic histories of organisms. However, it remains unclear if physiological controls on size remain constant throughout ontogeny or instead shift as organisms grow larger. Benthic foraminifera provide an opportunity to quantify and interpret the physicochemical controls on both initial (proloculus) and adult volumes across broad environmental gradients using first principles of cell physiology. Here, we measured proloculus and adult test dimensions of 129 modern rotaliid species from published images of holotype specimens using holotype size to represent the maximum size of all species' occurrences across the North American continental margin. We merged size data with mean annual temperature, dissolved oxygen concentration, particulate organic carbon flux, and seawater calcite saturation for 718 unique localities to quantify the relationship between physicochemical variables and among-species adult/proloculus size ratios. We find that correlation of community mean adult/proloculus size ratios with environmental parameters reflects co-variation of adult test volume with environmental conditions. Among-species proloculus sizes do not co-vary identifiably with environmental conditions, consistent with the expectation that environmental constraints on organism size impose stronger selective pressures on adult forms due to lower surface area-to-volume ratios at larger sizes. Among-species adult/proloculus size ratios of foraminifera occurring in resource-limited environments are constrained by the limiting resource in addition to temperature. Identified limiting resources are food in oligotrophic waters and oxygen in oxygen minimum zones. Because among-species variations in adult/proloculus size ratios from the North American continental margin are primarily driven by the local environment's influence on adult sizes, the evolution of foraminiferal sizes over the Phanerozoic may have been strongly influenced by changing oceanographic conditions. Furthermore, lack of correspondence between among-species proloculus sizes and environmental conditions suggests that offspring size in foraminifera are rarely limited by physiological constraints and are more susceptible to selection related to other aspects of fitness.
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Allen Brain Atlas
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