Family: Oral region flat only at apex; cytostome-cytopharynx circular to ovoid.
Genus: Body long to ovoid; cilia on 1 surface (Illustrated Guide, 1985). Long, thin, cylindrical in shape (vermiform); flattened laterally; contractile; anterior is truncated with cytostome lying along the apical edge; several contractile vacuoles along the dorsal edge (Carey, 1992).

->> Description at WPRNO

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H. vermiculare 785 μm Asaka Saitama, 1999	H. vermiculare 685 μm feeding USA, 1999	H. vermiculare Mic. division USA, 1999	H. vermiculare > 515 μm Ujiie (Sakura) Tochigi, 2001
H. vermiculare μm Moroyama town Saitama, 2003	H. vermiculare μm Yanase river Fujimi Saitama, 2004	H. vermiculare 412 x 40 μm Iruma river Sayama Saitama, 2004	H. vermiculare 680 x 48 μm Gozaisho marsh Hachimantai Iwate, 2005
H. vermiculare 450 x 25-30 μm Akebono marsh Tsuchiyu-onsen Fukushima, 2005	H. vermiculare ? with endosymbionts 320 x 30 μm Karakemi marsh Yasaka Nagano, 2005	Homalozoon ? 50 μm Japan, 199?

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