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Amphistegina lessonii

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Journal Article
Published: 01 January 2012
Journal of Foraminiferal Research (2012) 42 (1): 56-65.
... of stress response. Our goal was to combine these approaches, focusing on populations of the symbiont-bearing foraminifer Amphistegina lessonii from Fernando de Noronha Archipelago (northeastern Brazil). Reef-rubble samples containing A. lessonii were collected at five sampling sites on the leeward side...
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Journal Article
Published: 01 October 1977
Journal of Foraminiferal Research (1977) 7 (4): 273-277.
Image
1a, b  <b>Amphistegina</b> <b>lessonii</b>  d’Orbigny: a, umbilical view; b, spiral view....
Published: 01 April 2016
Figure 8 1a, b Amphistegina lessonii d’Orbigny: a, umbilical view; b, spiral view. 2a, b Amphistegina papillosa Said: a, umbilical view; b, spiral view. 3a, b Ammonia convexa (Collins): a, umbilical view; b, spiral view. 4a, b Asterorotalia gaimardi (d’Orbigny): a, umbilical view; b
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1–3  <b>Amphistegina</b> <b>lessonii</b> : Specimens deployed for five days at Reference ...
Published: 01 April 2015
Figure 6 1–3 Amphistegina lessonii : Specimens deployed for five days at Reference site (1a, b), 15 m from vent (2a, b), and 7.5 m from vent (3a, b). 4–6 Am. lobifera : Specimen deployed for five days at Reference site (4a, b), 15 m from vent (5a, b), and 7.5 m from the vent (6a, b). 7–9 Am
Image
Redundancy analysis triplot for biomarkers data in  <b>Amphistegina</b> <b>lessonii</b>  ...
Published: 01 January 2012
Figure 8. Redundancy analysis triplot for biomarkers data in Amphistegina lessonii and physicochemical parameters (dissolved organic carbon [DOC] and dissolved metal concentrations) in water collected off Fernando de Noronha Island.
Journal Article
Published: 01 April 2016
Journal of Foraminiferal Research (2016) 46 (2): 149-170.
...Figure 8 1a, b Amphistegina lessonii d’Orbigny: a, umbilical view; b, spiral view. 2a, b Amphistegina papillosa Said: a, umbilical view; b, spiral view. 3a, b Ammonia convexa (Collins): a, umbilical view; b, spiral view. 4a, b Asterorotalia gaimardi (d’Orbigny): a, umbilical view; b...
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Journal Article
Published: 01 January 2000
Journal of Foraminiferal Research (2000) 30 (1): 54-65.
..., Amphistegina lessonii, Assilina ammonoides, Borelis schlumbergeri, Challengerella bradyi, Hauerina diversa, and Peneroplis planatus. Five of these foraminifera are algal symbiont bearing forms. The diatom-bearing species, A. lessonii and A. ammonoides, constituted 40 to 50% of the total number of tests...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1959
AAPG Bulletin (1959) 43 (3_Part_1): 501-562.
... Halimeda, (5) calcium carbonate sand composed largely of a Foraminifera species (Amphistegina lessonii) different from those in shallow water, and (6) calcium carbonate mud. Mechanical analyses indicate that in areas of shallow water, sediments are progressively finer with depth, and a gradation lagoonward...
Journal Article
Published: 01 July 2017
Journal of Foraminiferal Research (2017) 47 (3): 252-257.
... Andaman. We recorded a total of 16 LBF species belonging to 12 genera and 7 families. Amphistegina lessonii, A. radiata, and Calcarina spengleri were found at five of the sites surveyed. The density of living larger benthic foraminifera was 5–17 specimens per cm 2 . The Shannon-Wiener Diversity Index (H...
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Journal Article
Published: 01 October 2016
Journal of Foraminiferal Research (2016) 46 (4): 369-392.
... that are somewhat more muddy, with somewhat higher concentrations of organic matter and heavy metals. Foraminiferal assemblages include larger taxa ( Amphistegina lessonii , Peneroplis pertusus , Neorotalia calcar , and Sorites orbiculus ), as well as smaller species ( Elphidium crispum , Glabratella patelliformis...
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Journal Article
Published: 01 April 2012
... thanatofacies (D4), found at an inlet and in the immediately adjacent lagoon, has a high diversity assemblage dominated by the calcareous taxa Amphistegina lessonii and Ammonia aff. A. aoteana. Five biofacies recognized by cluster analysis of live foraminiferal data exhibit similar salinity-related distribution...
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Journal Article
Published: 01 April 2012
Journal of Foraminiferal Research (2012) 42 (2): 109-133.
... thanatofacies (D4), found at an inlet and in the immediately adjacent lagoon, has a high diversity assemblage dominated by the calcareous taxa Amphistegina lessonii and Ammonia aff. A. aoteana . Five biofacies recognized by cluster analysis of live foraminiferal data exhibit similar salinity-related...
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Journal Article
Published: 01 January 2008
Journal of Foraminiferal Research (2008) 38 (1): 23-38.
... in the extreme south of the State of Bahia. Cluster analysis of the species, identified from 38 samples of surface sediments, revealed a strong correlation with grain size. The principal relationships established between these species and the sediments were the following: (i) Amphistegina lessonii and Peneroplis...
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Journal Article
Published: 01 October 2007
Journal of Foraminiferal Research (2007) 37 (4): 327-343.
... hispidulum , Pararotalia venusta , Planispirinella exigua , Quinqueloculina venusta and Triloculina oblonga ; and a middle shelf zone dominated by Amphistegina lessonii , Dendritina striata and Operculina complanata . The zonations of the study areas and relative abundances of individual species indicate...
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Journal Article
Published: 01 April 2003
Journal of Foraminiferal Research (2003) 33 (2): 132-143.
... with modern tests. This assemblage differs from the recent one by including large relict species dominated by Quinqueloculina bicostata, Q. lamarckiana, Amphistegina lessonii and Eponides repanda. Two hypotheses account for the relict assemblage: periods of low sea-level and mixing with younger sediments...
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Journal Article
Published: 01 October 2011
Journal of Foraminiferal Research (2011) 41 (4): 314-325.
... a for the chlorophyte-bearing soritid foraminifers Archaias ( Ar. ) angulatus and Cyclorbiculina compressa , and the diatom-bearing amphisteginids Amphistegina gibbosa , Am. lessonii , and Am. radiata . Chlorophyll a concentrations were 40–50% lower in C. compressa than in the four other species. Photosynthesis...
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Series: SEPM Special Publication
Published: 01 January 2009
DOI: 10.2110/sepmsp.093.067
EISBN: 9781565762978
.... — Amphistegina T/D distribution in mesotrophic conditions can be expressed mathematically by Equation 2 for Z m . Notice the similarity with light extinction pattern in me-sotrophic conditions. Fig. 5. — A) Amphistegina lessonii and B) A. radiata, T/D distribution with depth in mesotrophic...
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Journal Article
Published: 01 January 2018
Journal of Foraminiferal Research (2018) 48 (1): 4-16.
... of the diatom symbionts within the foraminifer Amphistegina gibbosa . Data on bleaching prevalence and photochemical efficiency for photosystem II (PSII) were obtained from specimens collected at Tennessee Reef, Florida reef tract, USA, as close as logistically feasible to each equinox and solstice in 2012...
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Journal Article
Published: 01 April 2012
... could not be distinguished from Amphistegina lessonii because they lacked prominent lobes (e.g., see Uthicke and Nobes, 2008 ), but as no adult A. lessonii were found in the samples, we concluded that the juveniles were A. lobifera as well. Maximum diameters of living tests, measured by ocular...
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Journal Article
Published: 01 April 2012
Journal of Foraminiferal Research (2012) 42 (2): 143-150.
... were counted under a stereozoom binocular microscope, but only the living, recognized by the presence of chloroplasts and obvious pseudopodial activity, were studied further. Some juveniles could not be distinguished from Amphistegina lessonii because they lacked prominent lobes (e.g., see Uthicke...
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