Family:
Genus: Locomotive form elongate, cylindrical; anterior hyaline cap always presents; posterior end narrowed; dorsal surface wrinkled; monopodial locomotive form 60-275 micron; L/B 1.4 - 10.5; cytoplasm highly vacuolated.
P. proteoides
6 clips
Shirasaka
Shirakawa
Fukushima, 1999