-
Astrammina species are spherical, with distinctive long apertural projections called stolons. This specimen has several apertures in a single stolon. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
-
This specimn was found attached to a surface, with a cooresponding change in the morphology of the stolon. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
-
This specimen has two distinct apertures (one is quite visible at upper left). Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
-
This specimen has no distinct apertures through the test, which is not uncommon in members of this genus. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
-
Greenland Sea/Arctic, cruise of Polarstern found at 78.58N 07.37W at 192m depth 30.9.1995
-
Tholosina species attach to surfaces and build an agglutinated dome over the cell body. The dome is more "inflated" looking than the ones produced by their apparent relatives, the genus Hemisphaerammina. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
-
This view shows the inside of the dome-shaped test. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.
-
This giant Antarctic foraminiferan is often several millimeters across. Notice the two large projections (called stolons. In this species, the reticulopodia emerge from the ends of the stolons. Image courtesy of Samuel S. Bowser, Wadsworth Center.
-
A live cell in its native environment. Notice that the foram has selected two discrete sizes of sand grains to make its test, and does not use the other sizes available to it. Photo courtesy of Robert Sanders. More information about this image is available at the
McMurdo Sound Underwater Field Guide.
-
This darkfield image shows the reticulopodial network (blue fibers); the cell body is the dark circular mass at lower left. Image courtesy of Samuel S. Bowser, Wadsworth Center.
-
An SEM of part of the reticulopodial network. A. rara reticulopods are unusually strong, capable of trapping and rending juvenile arthropods and echinoderms. Image courtesy of Samuel S. Bowser, Wadsworth Center.
-
A DIC image of the cell body. The circular mass within the cell is the nucleus; the elongate form just below it is a diatom frustule. Image courtesy of Samuel S. Bowser, Wadsworth Center. This image first appeared in J. Foram Res. 32:364-374 (2002) and is used with permission.
-
This species has a test composed of two polygonal, slightly convex agglutinated plates. Juvenile A. triangularis tend to have three or four sides to the polygon, while larger specimens have more. The white sphere at lower right is a cell body removed from its test. Image courtesy of Samuel S. Bowser, Wadsworth Center.
-
These individuals are in the process of constructing new tests from quartz grains. Bcause members of the genus Astrammina have sturdy theca, they can easily be removed from their tests without injury. This allows easy study of the process of test assembly in these agglutinating forams. Image courtesy of Samuel S. Bowser, Wadsworth Center.
-
This Antarctic allogromiid has a loosely-agglutinated but thick test made mostly of fine sand. The grains appear to be held together by reticulopodia, rather than by an organic cement. Image courtesy of Samuel S. Bowser, Wadsworth Center.
-
This false-color image shows part of a single individual. The main cell body is at the lower portion of the image. These forams can be as much as 2-3 cm. across. Like other athalamids, Reticulomyxa has no clearly defined test. Image courtesy of Samuel S. Bowser, Wadsworth Center.
-
A live cell in its native environment. This species is found both in the "arborescent" morphology shown here and as a simple agglutinated sphere. Photo courtesy of Robert Sanders. More information about this image is available at the
McMurdo Sound Underwater Field Guide.
-
A live cell in its native environment. The tree-like structure allows the foram to lift its reticulopods a centimeter or more of the seafloor. Photo courtesy of Robert Sanders. More information about this image is available at the
McMurdo Sound Underwater Field Guide.
-
Notice the network of reticulopodia emerging from the aperture of the organic-walled test. 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.
-
Notice the distinctive "herringbone" texture of the organic test (the dark portion of the image). Part of the cell itself fills the upper right hand corner of the photo. 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.
-
Image from Loeblich and Tappan's Foraminiferal Genera and their Classification. Originally appeared in Loeblich and Tappan 1964.
-
The foram in life position. The upper third protrudes from the seafloor, while the rest remains buried. Image courtesy of Andrew J. Gooday, Southampton Oceanography Centre. This image first appeared in J. Foram. Res. 22:129-146 (1992) and is used with permission.
-
This approx. 10 cm. long individual was taken from the seafloor at 840 m. depth, 144 km. east of Cape Lookout, North Carolina. Image courtesy of Andrew J. Gooday, Southampton Oceanography Centre. This image first appeared in J. Foram. Res 22:129-146 (1992) and is used with permission.
-
This SEM image shows the two distinct particle types that make up the foram's agglutinated wall. The outer surface is made of fine, black or brown particles, and is underlain by a much thicker layer of sponge spicules and small quartz particles. Image courtesy of Andrew J. Gooday, Southampton Oceanography Centre. This image first appeared in J. Foram. Res 22:129-146 (1992) and is used with permission.