Portrait of the stichotrichine ciliate, Chaetospira remex
(Hudson,1875; Kahl,1932). This species occupies a long, sometimes branched tubular lorica into which it intermittently retracts (as seen in this image). The lorica is attached to the substratum. C. muelleri
has a flask-shaped lorica. The cell body is slender,elongate and very contractile. The corkscrew shaped anterior bears a prominent adoral zone of membranelles along the peristome. The somatic ciliature is reduced to right and left marginal and two ventral files of short cirri which spiral down the body. The macronucleus is bipartite. the contractile vacuole is in mid-body between the two macronuclei. Feeds mainly on bacteria, flagellates and diatoms. Collected from a freshwater pond near Boise, Idah May 2004. DIC optics.