Genus (Stein, 1863 or 1862?): Ovoid; an equatorial furrow marks conical anterior and spherical posterior parts; in the furrow are inserted two (or more) rings of strong cilia; one directed anteriorly and the other posteriorly; with tentacle-like retractile processes around the cytostome (Kudo, 1966).
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M. pulex
22 x 15 μm
Japan, 1998
Movies 
M. pulex
19 x 15 μm
25 x 18 μm
34 x 24 μm
Japan, 1997
M. pulex
20 x 14 μm
Sue-machi
Fukuoka, 2001M. pulex
cell μm
Japan, 1999
M. pulex
23 x 15 μm
Wakamiya Park
Takamatsu
Kagawa, 2002
M. pulex
21 x 13 μm
Wakamiya Park
Matto
Ishikawa, 2002
M. pulex
20 x 15 μm
Onnenai
Kushiro marsh
Hokkaido, 2005
