Family: Similar to Euglenidae in body form and general structure, but without chromatophores (chloroplasts); body highly plastic, although usually elongate spidle (Kudo, 1966).
Genus:

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P. granulifera cell 20 x 11 μm flag. 28 μm Tochigi, 1999	P. granulifera cell 16 μm flag. 27 μm Japan, 1998	P. granulifera cell 14 x 8 μm flag. 26 μm Japan, 1999	P. granulifera cell 12 x 7 μm flag. 23 μm Kurome river Saitama, 2000
P. granulifera cell μm Senjo-ga-hara Nikko Tochigi, 2003	P. granulifera cell μm Omine-numa Tsukiyono Gunma, 2003	P. granulifera cell 18 x 16 μm flag. 35 μm Kowashimizu Suwa Nagano, 2005	P. granulifera cell 18 x 11 μm flag. 25 μm Tane-ike Togakushi highland Nagano, 2005
P. granulifera cell μm flag. μm Tonbo-no-numa Isumi Chiba, 2007	P. granulifera cell μm flag. μm Iyari marsh Omachi Nagano, 2008

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