Optical section of the marine nassulid ciliate, Paranassula brunnea (Fabre-Domerge,1885)Fauré-Fremiet,1963. The cell body is an elongate cylinder rounded anteriorly and posteriorly. Size varies from medium to large (100-300 µm). The genus is distinguished by the unique oral apparatus, which lies in the anterior 1/4 of the body. There is an atrial depression (viewer's left here) within which two short polykinetids are located. This atrium leads to a stout cytopharyngeal basket. The somatic ciliature is composed of closely spaced uniform longitudinal kineties. There is a short straight preoral suture. There is a long centrally located vermiform macronucleus (seen here). A single contractile vacuole is located in the mid-body (viewer's right in this image). Collected from a commercial saltwater aquarium in Boise, Idaho. DIC. Image by Bill Bourland, he uses a Zeiss Axioskop 2 with a Spot Insight CCD camera (Diagnostic Instruments). Image copyright: William Bourland, image used under license to MBL (micro*scope).
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From the collection
Marine microbes from Idaho
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