Family: Loricate; with or without stalk; body slender, extensible, attached in lorica aborally; macronucleus long (Illustrated Guide, 1985).
Genus: Lorica attached aborally by stalk; operculum attached just behind peristomal border (Illustrated Guide, 1985). Body attached posteriorly to a lorica; a discoidal corneous operculum developed beneath border of peristome (Kudo, 1966).

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P. pusilla cell 50 μm lorica 46 x 25 μm Japan, 1998	P. pusilla cell 50 μm lorica 45 x 25 μm Asa-kawa Hachioji Tokyo, 2005	P. pusilla ? cell 52 μm lorica 50 x 23 μm Japan, 1998	P. annulata ? lorica 80 x 31 μm Imori pond Myoko highland Niigata, 2004
P. carteri cell 98 μm lorica 75 x 28 μm Tokyo, 2001	P. carteri cell 94 x 17 μm lorica 75 x 30 μm Tennoh Tessei-cho Okayama, 2004	P. carteri cell 105 x 14 μm lorica 85 x 28 μm Obihiro Univ. AVM Obihiro Hokkaido, 2005	P. carteri cell μm lorica 90 x 33 μm Junichogata Himi Toyama, 2006
P. carteri or P. constricta ? lorica 65 x 28 μm Yamagata, 1999	P. carteri or P. constricta ? lorica 73 x 25 μm USA, 1999	P. carteri or P. constricta ? lorica μm Hanyu Saitama, 2003

Similar Genus ->> Thuricola; Vaginicola; Cothurnia; Platycola

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