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This fossil test was found in Albian strata, thought to have been laid down in anoxic conditions. Image courtesy of Joan Bernhard, WHOI. This image originally appeared in J. Foram. Res. 16:207-215 and is used with permission.
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A living planktonic foraminifer with a multi-chambered, calcitic shell and numerous radiating spines that are attached to the surface of the shell. Algal symbionts, enclosed by the foraminferal cytoplasm that streams out of the shell, appear as golden-yellow spherules scattered along the surface of the spines.
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This fossil was taken from Cenomanian strata (the Mancos Shale). Image courtesy of Joan Bernhard, WHOI. This image originally appeared in J. Foram. Res. 16:207-215 and is used with permission.
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Hastigerina (has-tidge-err-ine-a) pelagica, a large planktonic foraminiferan, in which the test (broken) is formed of almost spherical chambers. The test gives rise to long spines as well as to many pseudopodia. This species contains commensal algae, and some are visible as orange dots in the pseudopodial halo around the cell. This is an example of one of the four types of large amoebae which is common in the marine water column. Dark ground image by Linda Amaral-Zettler
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Image courtesy of Joan Bernhard, WHOI. This image originally appeared in J. Foram. Res 16:207-215 and is used with permission.
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Foraminiferans living in polluted environments often show alterations in the morphology of their tests. This individual, isolated from a site in Norway which is contaminated with heavy metals, shows extra protuberances on some of its chambers. Image courtesy of Dr. Elisabeth Alve, University of Oslo. Citation: Alve, E. Benthic foraminifera reflecting pollution. Journal of Foraminiferal Research 21:1-19.
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This specimen was collected off the southeast coast of the island of Honshu (Japan). Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.
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Foraminiferans living in polluted environments often show alterations in the morphology of their tests. This individual, isolated from a site in Norway which is contaminated with heavy metals, has a prominent lump on its test (on the right side). The most recent chamber of this test has been broken off; you can see the edges of it at the bottom of the photograph. Notice the triserial arrangement of the test chambers, which is particularly easy to see in this photo. Image courtesy of Dr. Elisabeth Alve, University of Oslo. Citation: Alve, E. Benthic foraminifera reflecting pollution. Journal of Foraminiferal Research 21:1-19.
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This species is less "flat" than its sister species, P. opercularis. Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.
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Foraminiferans living in polluted environments often show alterations in the morphology of their tests. This individual, isolated from a site in Norway which is contaminated with heavy metals, has an extra chamber (right) with a second aperture. Image courtesy of Dr. Elisabeth Alve, University of Oslo. Citation: Alve, E. Benthic foraminifera reflecting pollution. Journal of Foraminiferal Research 21:1-19.
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Notice the prominent "bosses" on the underside of the test. Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.
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Ammonia (a-moan-knee-a), one of the foraminifera living within a multi chambered test. Pseudopodia system, showing network nature, small granules move actively along the tracts, which extend, are resorbed, branch and fuse. Phase contrast
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This species is common in Japanese coastal waters. Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.
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Ammonia, one of the foraminifera living within a multi chambered test. Living cell, with pseudopodia being produced from the opening of the terminal chamber and from the surface of the test. Phase contrast
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Notice the flatter profile and diferent coiling pattern compared to P. nakamurai. Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.
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Ammonia (a-moan-knee-a), one of the foraminifera living within a multi chambered test. Dorsal surface. Phase contrast
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Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.
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Ammonia (a-moan-knee-a), one of the foraminifera living within a multi chambered test. Living cell, with pseudopodia being produced from the surface of the test. Phase contrast
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Although this foraminiferan morphologically resembles the "Type A" form of P. opercularis, it is more closely related to P. nakamurai by ITS sequence phylogenetic analysis. This specimen was collected off the southeast coast of the island of Honshu (Japan). Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.
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Ammonia (a-moan-knee-a), one of the foraminifera living within a multi chambered test. Living cell, ventral surface. Phase contrast
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Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.
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Ammonia (a-moan-knee-a),one of the foraminifera living within a multi chambered test. Living cell, with pseudopodia being produced from the opening of the terminal chamber and from the surface of the test. Phase contrast
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This specimen was collected off the southeast coast of the island of Honshu (Japan). Image courtesy of Masashi Tsuchiya, Japan Agency for Marine-Earth Science and Technology. This image first appeared in J. Foram Res. 33:285-293 and is used with permission.