Family: Holotrichous body kineties slightly spiral with striae between (Illustrated Guide, 1985).
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).
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Similar genus --> Prorodon
P. luciae
μm
Senjo-ga-hara
Nikko
Tochigi, 2003
Placus sp. ?
or Caryotricha ?
44 x 25 μm
Japan, 199?