Unda (un-da) small to medium-sized naked amoeba with broad hyaline zone - to the top in this micrograph. Phase contrast micrograph. 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).
download as pdf file
download large file
From the collection
American Type Culture Collection
|Description of Unda: Locomotive form as a flattened ovoid with length less than breadth. Length between 20 and 60 µm. Hyaloplasm characteristically advances in waves at anterior margin. No posterior uroid. Floating form with short cylindrical pseudopodia. Nucleus spherical. Cytoplasm often with small vesicles and conspicuous greenish or yellowish granules. No cysts known. Fine structure of surface coat unknown. Marine, with 3 described species. Type species: U. maris Schaeffer, 1926. |