Placus (plake-us) is a barrel-shaped ciliate. Kineties of cilia run in a slightly spiral course from the anterior end - which is where the mouth is, to the posterior end of the body. Kineties have adjacent sharp-walled gutters. Eats detritus, such as algae. Differential interference contrast. This picture was taken by David Patterson, Linda Amaral Zettler and Virginia Edgcomb of material from the salt marsh at Little Sippewissett (Massachusetts, USA) in Autumn, 2000 and in Spring and summer, 2001. Image copyright: D. J. Patterson, L. Amaral-Zettler and V. Edgcomb, image used under license to MBL (micro*scope).
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From the collection
Little Sippewissett salt marsh, Massachusetts, USA
|Description of Placus: Protsome ciliates, brosse dikinetids extending along side circumoral dikinetid, and then posteriorly; toxicysts in palps beside brosse for its entire length; with ventral depression or fossette into which extend two somatic kineties. |