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A closeup of the aperture. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
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This species is common in the deep, marine ares of the Sandebukta, a branch of the Oslofjord. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
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False-color image of a foraminiferan (pink) rending and consuming a bacterial biofilm (blue). The dark area is the region cleared by the foram in approximately 12 hours. Species not identified. Image courtesy of Joan Bernhard, WHOI. A version of this image appeared in Bernhard, J., and Bowser, S.S. (1992) Mar. Ecol. Prog. Ser. 83:263-272.
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A brightfield image of a portion of a reticulopod and several rod-shaped bacteria. The oral zone of the foraminiferan is at upper left. Image courtesy of Samuel S. Bowser, Wadsworth Center.
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The wall of this foram includes a thick inner organic lining (IOL) underlying the agglutinated layer (A). The cell body is at lower right. Image courtesy of Susan T. Goldstein, University of Georgia. This image first appeared in J. Foram Res. 32:375-383 and is used with permission.
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This foram was collected from a salt marsh on Sapelo Island, Georgia. The species name is due to this foram's habit of agglutinating fine, light-colored particls; it appears white under the light microscope. Image courtesy of Susan T. Goldstein, University of Georgia. This image first appeared in J. Foram Res. 32:375-383 and is used with permission.
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This image shows the foram's reticulopodia (the elaborate branching pseudopodia sticking out of the vase-like hole in the test). Reticulopods are the defining morphological characteristic of the Granuloreticulosea as a group. Image courtesy of Susan T. Goldstein, University of Georgia.
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Psammophaga species are noted for taking sand grains into their bodies; the genus name means "sand eater" in Greek. You can see the coarse quartz sand through the translucent walls of the foram's test. Image courtesy of Susan T. Goldstein, University of Georgia.
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Bathyallogromia was found in deep water (1000 to 6300 m) in the Weddell Sea, off the coast of Antarctica. Both images are of the same foram. The left image has the focal plane through the aperture (the twin bumps on the left side); the right image has the focal plane through the nucleus (indicated by the red arrow). The cell is about 200 um across, and appears whitish in reflected light. Image courtesy of Andrew J. Gooday, Southampton Oceanography Centre.
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The aperture is a passage through the foram's transparent test, and is the route that the reticulopodia take to extend into the environment. The aperture of this species is surrounded by a "collar" which protrudes from the rest of the test. Image courtesy of Andrew J. Gooday, Southampton Oceanography Centre.
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Top: Reflected-light image of three individuals of the species, showing size variation. The white color is caused by a very fine layer of sand particles (probably quartz) that the foram glues to its outer surface. Bottom: A slightly higher-magnification transmitted-light image, with the nucleus clearly visible. Length of this specimen: approximately 600 um. Image courtesy of Andrew J. Gooday, Southampton Oceanography Centre.
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This image clearly shows the fine grains that make up the test surface. Inset: a closeup of the aperture. Image courtesy of Andrew J. Gooday, Southampton Oceanography Centre.
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Lieberkuehnia from the Severn Estuary as promised.
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This image clearly shows the prominent "collar" around the oral zone for which the species is named. Image courtesy of Samuel S. Bowser, Wadsworth Center.
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This species has an organic-walled test, which is thin, flexible and somewhat transparent. It is visible as the hazy "halo" around the cell body. Image courtesy of Samuel S. Bowser, Wadsworth Center.
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This individual is surrounded by the empty frustules of diatoms it has consumed. Image courtesy of Jeffrey L. Travis, University at Albany.
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Marine thecate foraminiferan with reticulopods extended. Isolated from culture provided by Jeff L. Travis. Microscopy by L.W.Parfrey
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A closeup of the opening. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
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"Lagena" is a Latin word meaning "flask". This flask-shaped foram was found in the Oslofjord, Norway. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
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As the genus name (which means "sand ball") implies, Psammosphaera species form relatively featureless single-chambered coarse tests. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
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This benthic species generally lives buried under 2-5 mm. of sediment. Image courtesy of Thomas Wilding, Southampton Oceanography Centre. This image first appeared in J. Foram. Res 32:358-363 and is used with permission.
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The opaque white color of the cytoplasm gives this species its name. Notice the loose structure of the cell mass. Image courtesy of Thomas Wilding, Southampton Oceanography Centre. This image first appeared in J. Foram. Res 32:358-363 and is used with permission.
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An individual that has contracted into a rounded shape after collection. Image courtesy of Thomas Wilding, Southampton Oceanography Centre. This image first appeared in J. Foram. Res 32:358-363 and is used with permission.
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