Ammoniinae

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

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

Discription to come

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 protuberances on two of its chambers (bottom), which distort the characteristic coiling pattern of the test. Image courtesy of Dr. Elisabeth Alve, University of Oslo.  Citation: Alve, E. Benthic foraminifera reflecting pollution. Journal of Foraminiferal Research 21:1-19.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

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

Discription to come

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, exhibits reduced chamber size in its second-to-last chamber, at bottom. Image courtesy of Dr. Elisabeth Alve, University of Oslo.  Citation: Alve, E. Benthic foraminifera reflecting pollution. Journal of Foraminiferal Research 21:1-19.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

Ammonia (a-moan-knee-a), one of the foraminifera living within a multi chambered test. Dorsal surface. Phase contrast

This specimen, a dead test, has been in an environment that stripped the calcium carbonate away; only the organic lining remains. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.

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

This dead test has had some of the calcium carbonate leached from it, giving the test surface a rough appearance. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in J. Foram. Res. 16: 261-284; used with permission.

Ammonia (a-moan-knee-a), one of the foraminifera living within a multi chambered test. Living cell, ventral surface. Phase contrast

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

Ammonia (a-moan-knee-a), one of the foraminifera living within a multi chambered test. In this cell the test is empty. Photographed with crossed polarizers.

Notice the finely-perforated and glassy test; these features are characteristic of rotaliid foraminiferans. Collected in San Francisco Bay, USA. Phase-contrast photomicrograph by Scott Fay, 2005.

The reticulopodia are highly visible in this image of a living specimen. Individual collected from San Francisco Bay, USA. Phase-contrast photomicrograph by Scott Fay, 2005.

Ammonia sp. T7 was collected in the Lighthouse salt marsh on Sapelo Island, GA. The genus Ammonia is found worldwide in near shore environments, but there are many cryptic species.

Dynamic movement and bidirectional streaming seen in reticulopodia of Ammonia. Isolated by L Wegener. Video by DJ Patterson and D Lahr.

Calcareous foraminifera isolated from Eel Pond in Woods Hole, MA, USA by dredging pond. Phase contrast image by Laura Wegener Parfrey

Calcareous rotaliid foram isolated from marine sediments in Eel Pond, Woods Hole, MA, USA by Laura Wegener Parfrey.

This is the top (spiral) surface of a gamont of Ammonia parkinsoniana. Forams have complex and varied reproductive cycles. Some forms, such as this species, alternate between agamonts/schizonts (which are produced when two gametes fuse) and gamonts (which are produced when an agamont splits up into hundreds of smaller individuals). The two types often look so distinct from each other that they were originally mistaken for different species. Image courtesy of Pamela Stephens, Midwestern State University.

This is the bottom (umbilical) face of an A. parkinsoniana gamont. Image courtesy of Pamela Stephens, Midwestern State University.