in vivo

Açıklama:

Portrait of the free-swimming peritrich ciliate, Astylozoon faurei (complex). Since A. faurei and A. enriquesi differ only by the macronuclear morphology (reniform in the former and C-shaped in the latter) and since overlap in this feature between individuals, Foissner has grouped these two species into "Astylozoon faurei complex" (See Foissner, W., Berger, H. and Schaumburg, J.: Identification of Limnetic Plankton Ciliates. Bavarian State Office for Water Management. Munich, 1999; pp. 455-459). The cell has a globular inverted teardrop shape. Contracted cells are spherical. The oral aperture is anterior. There is a peristomial collar and the central peristomial disc is dome-shaped. The adoral ciliary field winds counterclockwise to the cytostome. There is a short posterior conical process bearing one or more short bristles. The single contractile vacuole lies dorsal to and empties into the vestibulum. The pellicle is marked by conspicuous transverse striae. In this population the transversely oriented C-shaped macronucleus is equatorial. Collected from a temporary rainwater pool containing dead grass near Boise, Idaho March 2005. DIC.