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129 results for “benthic species”
Fig. 6 in Dictyoconella Henson, 1948, Upper Cretaceous Larger Benthic Foraminifera: A Taxonomic Revision With The Establishment Of Gusicella Gen. Nov. (Type-Species Dictyoconella Minima Henson)
Fig. 6 Comparison of Gusicella gen. nov., Carinoconus Cherchi & Schroeder, and Dictyoconus Blanckenhorn.
Fig. 1 in Dictyoconella Henson, 1948, Upper Cretaceous Larger Benthic Foraminifera: A Taxonomic Revision With The Establishment Of Gusicella Gen. Nov. (Type-Species Dictyoconella Minima Henson)
Fig. 1 Map of the Persian Gulf area showing the location of Dukhan Well in Qatar, the type-locality of Dictyoconella complanata Henson and Gusicella minima (Henson) gen. et comb. nov. (from free maps, https://d-maps.com).
Fig. 5 in Dictyoconella Henson, 1948, Upper Cretaceous Larger Benthic Foraminifera: A Taxonomic Revision With The Establishment Of Gusicella Gen. Nov. (Type-Species Dictyoconella Minima Henson)
Fig. 5 Dictyoconus bakhtiari Schlagintweit et al. from the late Maastrichtian of the Tarbur Formation, SW Iran (Naghan section). Scale bar = 0.5 mm.
Fig. 4 in Dictyoconella Henson, 1948, Upper Cretaceous Larger Benthic Foraminifera: A Taxonomic Revision With The Establishment Of Gusicella Gen. Nov. (Type-Species Dictyoconella Minima Henson)
Fig. 4 Dictyoconella complanata Henson from the Maastrichtian of the Tarbur Formation of Iran (Naghan section, a-i, k) and the Simsima Formation of Qatar (j). a, d, oblique sections perpendicular to plane of compression. Note the inclination of the apical-juvenile part expressed by the parallel-sectioning of septum (s) and foramina (f) in d. b, oblique section passing through the initial part of a microspheric specimen. c, f, i-k, oblique sections in the plane of compression (j, paratype from Henson, 1948, pl. 10, fig. 14). Detail from i shows the fine subepidermal cellular network, marginal foramina and undivided marginal trough. e, g-h, oblique sections passing through the initial part of megalospheric specimens. Thin sections: 2Ng 81- 2 (a, d), Ng 76 (b), 2Ng 81-3 (c), Ng 85 (e), 2Ng 87-2 (f, i), 2Ng 80-1 (g), 2Ng 85-4 (h), 2Ng 81-1 (k). Abbreviations: b = beam, deu = deuteroconch, f = foramen m.f. = marginal foramen, m.t. = marginal trough, pi = pillar, pr = proloculus, T = Tarburina zagrosiana Schlagintweit et al. (in k).
Fig. 8 in Dictyoconella Henson, 1948, Upper Cretaceous Larger Benthic Foraminifera: A Taxonomic Revision With The Establishment Of Gusicella Gen. Nov. (Type-Species Dictyoconella Minima Henson)
Fig. 8 Gusicella minima (Henson) gen. et comb. nov. from the late Maastrichtian of the Tarbur Formation, SW Iran (Naghan section: a–b, j, l; Mandegan section: c–i, k, m–p). a Subaxial section. b, i, l Oblique sections. c–e, m Deep tangential sections displaying primary septules (beams) continuous (aligned) from one chamber to the next. f Shallow tangential section displaying subepidermal network of beams and rafters. g, j, l, o–p Different transverse sections, some slightly oblique. Note five marginal foramina arranged in a radial circle (inside yellow marked rectangle in o). Note oval test outline in j. Subaxial section. Note alternation of pillars by stairway-like arrangement of foramina (yellow line) and opaque fused pillars/secondary deposits in the central zone. k Detail from h showing marginal foramina arranged in vertical lines between successive chambers. n Tangential-oblique section. Abbreviations: b = beam, ib = intercalary beam, f = foramen, m.f. = marginal foramen, m.t. = marginal through, pi = pillar, s = septum. Thin sections: Ng 196 (a), Ng 192 (b), Rt 108-3 (c–e, g, n), Rt 104 (f), Rt 96 (h, k), Rt 108-6 (i), Ng 187 (j), Ng 186 (l), Rt 107 (m), Rt 102-2 (o), Rt 104 (p).
Fig. 7 in Dictyoconella Henson, 1948, Upper Cretaceous Larger Benthic Foraminifera: A Taxonomic Revision With The Establishment Of Gusicella Gen. Nov. (Type-Species Dictyoconella Minima Henson)
Fig. 7 Gusicella minima (Henson) gen. et comb. nov. from the late Maastrichtian of the Tarbur Formation, SW Iran (Mandegan section: b, l; Naghan section: a, c–k). a Oblique transverse section. b Oblique section cutting the marginal (upper part) and central zones (lower part) displaying irregularly distributed fused pillars/secondary deposits. c, k Subaxial sections. d–g, Axial sections showing initial spire. h–i Details (from e and g) of the initial spire. j Tangential section. Slightly oblique transverse sections showing subdivision of the marginal zone and circle of marginal apertures (left and above). Abbreviations: m.f. = marginal foramen, m.t. = marginal trough, pr = protoconch, s.d. = secondary deposits/fused pillars. Thin sections: 2Ng 17 (a, k), Rt 100 (b), Ng 180-1 (c), 2Ng 179-1 (d), 2Ng 168 (e, h), 2Ng 175 (f), 2Ng 174 (g, i), 2Ng 177 (j), Rt 113 (l).
The wash zone and habitat use among three benthic fish species in stratified lakes
<p>Mixing processes in lakes are important in determining sedimentation zones and in setting the so-called "wash zone", the area of lake bottom in contact with an oscillating thermocline during wind driven internal seiche events. The wash zone also aligns with a sharp change in sediment roughness and hardness. Taken together these rapid changes in temperature and sediment indicate that the wash zone is a distinctive ecotone in stratified lakes. Depth stratified randomized netting was used to develop count-based habitat use models for three common benthic fish species as a function of depth or temperature covariates. Using data from two lakes with quite different wash zone depths, we show the wash zone to describe fish habitat for two of three benthic fish species by utilizing the top 50% of estimated fish abundance as an indicator of habitat use. White sucker (<em>Catostomus commersoni</em>) habitat use was fully within the boundaries of the wash zone. Lake whitefish (<em>Coregonus clupeaformis</em>) habitat was adjacent and within the wash zone. Longnose sucker (<em>C. catostomus</em>) habitat use was in the deep areas of lakes dominated by sediment focusing and did not overlap white sucker. Lake whitefish habitat use overlapped both catostomids, but peak abundance of both lake whitefish and white sucker overlapped pointing to potential interactions between these species. Smaller lakes have less vigorous mixing processes and a narrower wash zone, so with a decline in lake size the likely area of the wash zone as habitat for benthic feeding fish would become smaller.</p>
Plate 2 in A report of three newly recorded benthic foraminiferal species from Korea
Plate 2. Photomicrograph and SEM image of the newly recorded species. All scales are 100 μm unless otherwise noted. 1-4. Hemirotalia foraminulosa Lei and Li, 2016; 1. (a-c) MABIK PR00044175; 1a. Ventral side view, SEM image; 1b. Lateral view, SEM image; 1c. Spiral side view, SEM image. 2. (a-e) MABIK PR00044176; 2a. Ventral side view, SEM image; 2b. Lateral view, SEM image; 2c. Spiral side view, SEM image; 2d. Spiral side view, photomicrograph; 2e. Ventral side view, photomicrograph. 3. (a-f) MABIK PR00044178; 3a. Ventral side view, SEM image; 3b. Lateral view, SEM image; 3c. Spiral side view, SEM image; 3d. Ventral side view, photomicrograph; 3e. Lateral view, photomicrograph; 3f. Spiral side view, photomicrograph; 4. (a, b) MABIK PR00044177; 4a. Ventral side view, photomicrograph; 4b. Lateral view, photomicrograph. 5-7. Oolina brevisolenia Zheng, 1979; 5. (a, b) MABIK PR00044179; 5a. Lateral view, SEM image; 5b. Basal view, SEM image. 6. (a-c) MABIK PR00044180; 6a. Lateral view, SEM image; 6b. Apertural view, SEM image; 6c. Close-up of aperture, SEM image. 7. MABIK PR00044181; Lateral view, photomicrograph under bright field, white arrow pointing entosolenian tube.
Plate 1 in A report of three newly recorded benthic foraminiferal species from Korea
Plate 1. Photomicrograph and SEM image of the newly recorded species. All scales are 100 μm. 1, 2. Planispirillina denticulogranulata (Chapman, 1907); 1. (a-h) MABIK PR00044173; 1a. Ventral side view, SEM image; 1b. Lateral side view, SEM image; 1c. Spiral side view, SEM image; 1d. Ventral side view, photomicrograph; 1e. Spiral side view, photomicrograph; 1f-h. Close-up of spiral suture ornamentation, SEM image. 2. (a, b) MABIK PR00044174; 2a. Spiral side view, SEM image; 2b. Close-up of spiral suture ornamentation, SEM image.
Fig. 1 in A report of three newly recorded benthic foraminiferal species from Korea
Fig. 1. Map of sampling sites. This map is made with QGIS software v.3.16.13 and the Natural Earth, free vector and raster map data.
FIGURE 2 in Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)
FIGURE 2. Scanning electron micrographs of the foraminifera specimens. Scale bar equals 100 µm. 1-3- Three different specimens of Polysaccammina ipohalina Scott, 1976b, illustrating the differences in size and form. In all specimens it is possible to see attached organic matter; 4-5- Polysaccammina hyperhalina Medioli, Scott, and Petrucci, 1983. 4- complete specimen of P. hyperhalina; 5- aperture view; 6- specimen with several side branches; 7-10- different sized specimens of Ammovertellina sp.; 11-14- various specimens of Reophax nana Rhumbler, 1913; 15-17- Leptohalysis scottii (Chaster, 1892); 15 and 16- side view of two complete specimens; 17- detail on the agglutination of the last chamber; 18- complete specimen of Ammobaculites exiguus Cushman and Brönnimann, 1948b; 19- Ammobaculites sp. with the uncoiled portion broken; 20-22- Ammotium salsum (Cushman and Brönnimann, 1948a); 20- best specimen; 21- smaller specimen; 22- aperture detail; 23- Ammotium sp.; 24-26- different specimens of Miliammina fusca (Brady, 1870); 27-28- Miliammina obliqua Heron-Allen and Earland, 1930; 27- view of the interio-marginal arch of the aperture; 29-30- Arenoparrella mexicana (Kornfeld, 1931); 29- ventral side with view to main aperture and supplementary apertures; 30- dorsal side with view to supplementary apertures; 31-32- Deuterammina eddystonensis Brönnimann and Whittaker, 1990; 31- dorsal view; 32- ventral view; 33-35- Jadammina macrescens (Brady, 1870); 33- dorsal view; 34- ventral view; 35- dorsal view of a deformed test.
FIGURE 1 in Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)
FIGURE 1. Location of the study area; 1) Geographical context of the Guadiana River basin in the Iberian Peninsula (Europe). Adapted from chguadiana.es (2012). Coordinate system: Datum ETRS89 UTM Zone 30N; 2) Study area: Map of the Guadiana Estuary with site locations.
FIGURE 7 in Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)
FIGURE 7. Distribution patterns of the common to dominant species in the samples collected in winter along a distance-to-sea and elevation gradients (in relation to MSL).
FIGURE 4 in Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)
FIGURE 4. Scanning electron micrographs of the foraminifera specimens. Scale bar equals 100 µm. 1-4- different sized specimens of Bolivina ordinaria Phleger and Parker, 1952, new name; 5- Buliminella elegantissima (d'Orbigny, 1839b); 6-7- Cornuspira involvens (Reuss 1850); 8-10- Miliolid sp1; 8- apertural view; 9- front view; 10- back view; 11- 13- Miliolid sp2; 11- apertural view; 12- front view; 13- back view; 14-16- Miliolid sp3; 14- front view; 15- apertural view; 16- back view; 17-18- Miliolid sp4; 17- apertural view; 18- front view; 19-21- Miliolid sp5; 19- apertural view; 20- front view; 21- back view; 22-23- Miliolid sp6; 22- front and apertural view; 23- back view; 24-26- Miliolid sp7; 24- front view; 25- apertural view; 26- front and apertural view; 27-29- Miliolid sp8; 27- front view; 28- apertural view; 29- front view of a smaller specimen.
FIGURE 8 in Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)
FIGURE 8. Distribution patterns of the common to dominant species in the samples collected in summer along a distance-to-sea and elevation gradients (in relation to MSL).
FIGURE 3 in Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)
FIGURE 3. Scanning electron and light microscope micrographs of the foraminifera specimens. Scale bar equals 100 µm except where noted otherwhise; 1-2- Jadammina macrescens (Brady, 1870); 1- supplementary apertures view; 2- detail of supplementary apertures (scale bar = 50 µm); 3-4- Lepidodeuterammina plymouthensis Brönnimann and Whittaker, 1990; 3- dorsal view; 4- ventral view; 5-8- Lepidodeuterammina ochracea (Williamson, 1858); 5- dorsal view; 6- ventral view; 7- dorsal view of a smaller specimen; 8- ventral view of a smaller specimen; 9-10- Portatrochammina sp.; 9- dorsal view; 10- ventral view; 11-13- Siphotrochammina sp.; 11- dorsal side with inter-cameral foramen view; 12- dorsal view of a smaller specimen, also with inter-cameral foramen; 13- ventral view of a smaller specimen; 14-16- Tiphotrocha comprimata Saunders, 1957; 14- dorsal view; 15- ventral view; 16- individual strongly attached to a sea-grass leaf; detail of a Pinus pollen grain at the center of the leaf; 17-21- Trochammina inflata (Montagu, 1808); 17- dorsal view; 18- ventral view; 19- ventral view with umbilical tube detail; 20- microspheric form dorsal view; 21- microspheric form ventral view; 22- Eggerelloides scaber (Williamson, 1858); 23-25- Textularia earlandi Parker, 1952; 23- apertural view; 24- lateral view; 25- profile view with aperture in detail; 26-29- Discorinopsis aguayoi (Bermúdez, 1935); 26- scanning electron dorsal view; 27- scanning electron ventral view; 28- light microscope dorsal view; 29- light microscope ventral view.
FIGURE 6 in Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)
FIGURE 6. RDA attribute plot representing the distribution and abundance of the dominant species in Guadiana Estuary according to elevation and distance-to-sea variables.
FIGURE 5 in Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)
FIGURE 5. Scanning electron and light microscope micrographs of the foraminifera specimens. Scale bar equals 100 µm. 1- Lamarckina haliotidea (Heron-Allen and Earland, 1911) ventral view; 2-3- Asterigerinata mamilla (Williamson, 1858); 2- dorsal view; 3- ventral view; 4-5- Discorbis sp.; 4- dorsal view; 5- ventral view; 6-7- Helenina anderseni (Warren, 1957); 6- dorsal view; 7- ventral view; 8- Haynesina depressula (Walker and Jacob, 1798) side view; 9- Haynesina germanica (Ehrenberg, 1840) side view; 10- Elphidium advenum (Cushman, 1922) side view; 11- Elphidium excavatum (Terquem, 1875) side view; 12-15- Elphidium wiliamsoni Haynes, 1973; 12- side view in light microscope image; 13- side view in scanning electron image; 14- profile view in scanning electron image; 15- side view of a smaller specimen in scanning electron image; 16-18- side view of different size Elphidium gerthi Van Voorthuysen, 1957; 19-21- Elphidium oceanensis (d'Orbigny, 1826); 19- side view in scanning electron image; 20- profile view in scanning electron image; 21- side view in light microscope image; 22- Elphidium poeyanum (d'Orbigny, 1826) side view; 24-27- Ammonia sp1; 24- dorsal view; 25- profile view; 26- ventral view; 27- dorsal view in light microscope image; 28-31- Ammonia sp2 (Ammonia aberdoveyensis Haynes, 1973); 28- dorsal view; 29- profile view; 30- ventral view; 31- dorsal view in light microscope image; 32-35- Ammonia sp3 (Ammonia aberdoveyensis Haynes, 1973); 32- dorsal view; 33- profile view; 34- ventral view; 35- dorsal view in light microscope image.
Fig. 5. Estimated species richness E in Spatial and temporal variation of benthic fish assemblages during the extreme drought of 1997-98 (El Niño) in the middle rio Negro, Amazonia, Brazil
Fig. 5. Estimated species richness E(Sn) by strata at rio Negro (a-Sep, b-Nov 1997 and c-Feb 1998) and rio Branco (d-Sep
Fig. 3. Estimated species richness E in Spatial and temporal variation of benthic fish assemblages during the extreme drought of 1997-98 (El Niño) in the middle rio Negro, Amazonia, Brazil
Fig. 3. Estimated species richness E(Sn) by months of collection for (a) rio Negro and (b) rio Branco.
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