Trichites of "fossette" and dorsal brush cilia
Infraciliature (right lateral view) of the prorodontid ciliate, Placus luciae (Kahl,1926) Kahl,1930. The cell is ovoid and slightly laterally compressed. The pellicle has broad slightly spiral ridges separated by narrow furrows. The small oval oral aperture is apical anterior, surrounded by a ring of unciliated kinetosomes. The cytopharynx is supported by fine trichites. The somatic ciliature uniform, with cilia. There is a "dorsal brush" (blue arrow), about 1/4 to 1/3 cell length, composed of a double parallel row of kinetosomes bearing longer cilia. It arises adjacent to the oral aperture and terminates at a ventral circular "pit" or "fossette" which has a supporting ring of transversely oriented trichites (yellow arrow). The function of this structure is unknown. The ovoid macronucleus is centrally located. The contractile vacuole is posterolateral. Collected from a slow-flowing freshwater stream near Boise, Idaho.Stained by the silver carbonate technic (see Foissner, W.Europ. J. Protistol.27,313-330;1991). Brightfield. This image was taken by William Bourland. He now uses a Zeiss Axioskop 2 with Spot Insight and Spot Flex CCD cameras (Diagnostic Instruments). Image copyright: William Bourland, image used under license to MBL (micro*scope).
download as pdf file
download large file
From the collection
Freshwater and Terrestrial Microbes of Idaho (USA) and Elsewhere
No description of Placus luciae available.
Contact site management to have description written.