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Prostomatea: Prorodontida: Placidae

Placus luciae
Kahl, 1926

Placus Genus: Body small; ellipsoid or ovoid; somewhat compressed; pellicle with conspicuous spiral furrows; cytostome a narrow slit at anterior extremity; with strong cilia on right margin of slit; macronucleus ellipsoid to sausage-form; contractile vacuole posterior (Kudo, 1966). Brosse dikinetids extend forward only to oral dikinetid (Illustrated Guide, 1985).

Placus luciae Kahl, 1926, cell body μm long, μm wide, x 640, Senjo-ga-hara (marsh), Nikko city, Tochigi Pref., Japan, September 2003 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Placus luciae Placus luciae Placus luciae Placus luciae

P. socialis (Fabre-Domergue): 40-50 μm long; 28-32 μm wide; about 22 μm thick, salt water (Kudo, 1966).

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