Rhogostoma (row-gaw-stow-ma) is a rarely reported amoeba with a flexible surrounding test and with a small opening through which pseudopodia can emerge. The opening is at the bottom of the cell and looks as if it has two lips. Large nucleus with nucleolus at the other side of the cell. Eats bacteria. Phase contrast. This picture was taken by David Patterson, Linda Amaral Zettler, Mike Peglar and Tom Nerad from cultures and other materials maintained at the American Type Culture Collection during 2001. Image copyright: D. J. Patterson, L Amaral-Zettler, M. Peglar and T. Nerad, image used under license to MBL (micro*scope).
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From the collection
American Type Culture Collection
|Description of Rhogostoma: Test: thin, flexible, transparent membrane, subspherical, compressed, no attached material. Pseudostome: a slit at end of oval invagination of test, perpendicular to the compression. Plasma fills the test completely, vesicular nucleus. Division longitudinal. open orthomitosis, nucleolus disintegrates. Feeding: bacteria. Habitat: freshwater debris, mosses, manure. Two species: Rhogostoma schuessleri Belar, 1921. According to Simitzis & Le Goff (1981) a species complex. |