-
An umbilical (bottom) view of the test. Ammonia species are very tolerant of salinity changes and are common in estuarine environments. 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.
-
This juvenile has only a few chambers, and is only beginning to show the distinctive coiled pattern of the adult. The genus is named after Ammon, the ram-headed Egyptian god. 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.
-
After gametogenesis, there is very little left of the parent cell. In this image, remnant cytoplasm in the empty test (which has been decalcified to make it more transparent) is being scavenged by a ciliate (arrow). Image courtesy of Susan T. Goldstein, University of Georgia. This image first appeared in J. Foram Res. 23:213-220, and is used with permission.
-
A closeup of biflagellated foraminiferal gametes leaving the aperture of the parent gamont. The gametes are about 2 um in diameter. Image courtesy of Susan T. Goldstein, University of Georgia. This image first appeared in J. Foram. Res. 23:213-220 and is used with permission.
-
A light micrograph of a "vegetative" gamont; i.e., on that has not yet begun the process of producing gametes. The test is approximately 250 um in diameter. Image courtesy of Susan T. Goldstein, University of Georgia. This image first appeared in J. Foram. Res. 23:213-220 and is used with permission.
-
A decalcified test after gamete release. The test is mostly empty; the dark spheres are the remnants of the cytoplasm. Image courtesy of Susan T. Goldstein, University of Georgia. This image first appeared in J. Foram. Res. 23:213-220 and is used with permission.
-
During gametogenesis, some forams draw a mass of sediment and detritus around their tests; this is called a "reproductive cyst". It is shed just before gamete release. Image courtesy of Susan T. Goldstein, University of Georgia. This image first appeared in J. Foram. Res. 23:213-220 and is used with permission.
-
This individual was harvested near Rimini, Italy. The aperture (on the left side) is quite prominent in this image, as are the different textures on the upper (spiral) and lower (umbilical) faces of the test. 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.
-
found at Cherai beach Nov 2007 near Kochi/India 9° 58' N, 76° 17' E
-
ound at Cherai beach Nov 2007 near Kochi/India 9° 58' N, 76° 17' E
-
ound at Cherai beach Nov 2007 near Kochi/India 9° 58' N, 76° 17' E
-
Ammonia beccariifound on Crete in MaliarecentSend me your sand or rock ! I extract the foraminifera and shoot the images for free. Info at
www.foraminifera.eu
-
-
-
-
Hayward, B.W.; Holzmann, M.; Tsuchiya, M. 2019. Combined molecular and morphological taxonomy of the beccarii/T3 group of the foraminiferal genus Ammonia. Journal of Foraminiferal Research 49: 367-389, Fig. 6.
-
Figure 1 in Hayward, B.W.; Holzmann, M.; Tsuchiya, M. 2019. Combined molecular and morphological taxonomy of the beccarii/T3 group of the foraminiferal genus Ammonia. Journal of Foraminiferal Research 49: 367-389. Figure 1. Growth series of Ammonia beccarii from north Adriatic Sea 1-3. Juvenile topotype intertidal sand, Rimini Beach, Adriatic Sea, Italy, Recent (F201292, BWH153/29). 4-6. Submature adult topotype intertidal sand, Rimini Beach, Adriatic Sea, Italy, Recent (F201292, BWH153/27). 7-9. Juvenile topotype intertidal sand, Rimini Beach, Adriatic Sea, Italy, Recent (F201292, BWH153/28). 10-12. Submature adult topotype intertidal sand, Rimini Beach, Adriatic Sea, Italy, Recent (F201292, BWH153/25). 13-15. Adult topotype from intertidal sand, Rimini Beach, Adriatic Sea, Italy, Recent (F201292, BWH153/23). 16-18. Adult specimens from Chioggia, Italy, Adriatic Sea; 16-17 (BWH163/17), 18 (BWH163/16). 19. Type illustrations of Plancus (1739). 20. Type illustrations of Gualtieri (1742). All scale bars 100 µm.
-
Hayward, B.W.; Holzmann, M.; Tsuchiya, M. 2019. Combined molecular and morphological taxonomy of the beccarii/T3 group of the foraminiferal genus Ammonia. Journal of Foraminiferal Research 49: 367-389. Supplementary figure 2. Neotype and seven topotypes of A. beccarii photographed with a Leica M205C binocular. Topotypes 1 to 3 represent juvenile forms, topotypes 4 and 5 represent submature adult forms, topotypes 6 to 7 and the neotype (8) are adult growth forms. Specimens are deposited in the Natural History Museum in London. 1a-8a: View of the umbilical side. 1b-8b: View of the spiral side. 8c: side view of the neotype, showing aperture of the penultimate chamber. 8d: Spiral side view of the neotype showing sutures. 8e: Spiral side view of the neotype showing proloculus.
-
Topotype from Rimini Beach, Italy
-
Italy, Chioggia, Recent (close to type locality, Rimini)
-
Italy, Chioggia, Recent (close to type locality, Rimini)