Rotalioidea

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

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

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 some of its chambers (notice that the test is not evenly rounded.) Image courtesy of Dr. Elisabeth Alve, University of Oslo.  Citation: Alve, E. Benthic foraminifera reflecting pollution. Journal of Foraminiferal Research 21:1-19.

This Eocene fossil specimen was collected near Parnes, France. Image courtesy of Stefan Revets. This image first appeared in Hansen and Revets, J. Foram. Res. 22:166-180 (1992) and is used with permission.

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.

Polystomella aculeata.

Image courtesy of Stefan Revets. This image first appeared in Hansen and Revets, J. Foram. Res. 22:166-180 (1992) and is used with permission.

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.

A view from the side of the test, facing the aperture. Sample collected at Hamble Estuary, Hampshire, England. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in the Journal of Foraminiferal Research 31:1; used with permission.

The aperture is at the center right edge. Image courtesy of Stefan Revets. This image first appeared in Hansen and Revets, J. Foram. Res. 22:166-180 (1992) and is used with permission.

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.

Sample collected at Hamble Estuary, Hampshire, England. This marine species is generally only found in the estuary during the summer and fall. Image courtesy of Elisabeth Alve, University of Oslo. Originally published in the Journal of Foraminiferal Research 31:1; used with permission.

Image of the holotype. Specimen is badly etched and difficult to place taxonomically. Test is 1.18 mm. in long dimension. Image courtesy of David B. Scott, Dalhousie University.   This image was originally published in Palaeologica Electronica, vol. 3, issue 2, and is used with the kind permission of that journal and the Paleontological Association.

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. Pseudopodia system, showing network nature, small granules move actively along the tracts, which extend, are resorbed, branch and fuse. Phase contrast

Image of the holotype. Test is 1.26 mm. across. Image courtesy of David B. Scott, Dalhousie University.   This image was originally published in Palaeologica Electronica, vol. 3, issue 2, and is used with the kind permission of that journal and the Paleontological Association.

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

Image of holotype, showing the aperture. Image courtesy of David B. Scott, Dalhousie University.   This image was originally published in Palaeologica Electronica, vol. 3, issue 2, and is used with the kind permission of that journal and the Paleontological Association.

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

Image of holotype. Test is 1.1 mm. across. Image courtesy of David B. Scott, Dalhousie University.   This image was originally published in Palaeologica Electronica, vol. 3, issue 2, and is used with the kind permission of that journal and the Paleontological Association.

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

Image of the holotype. The test is etched, and the orange encrustations are not part of the original test. Image courtesy of David B. Scott, Dalhousie University.   This image was originally published in Palaeologica Electronica, vol. 3, issue 2, and is used with the kind permission of that journal and the Paleontological Association.