Genus: Flask-shaped; elongate, flattened; anterior region neck-like; cilia only on right side; without trichocyst-borders; cytostome with trichocysts; two macronuclei (Kudo, 1966).
Species:

Single macronucleus ?
Litonotus sp. 45-50 μm 1 or 2 Mac. Japan, 199?	Litonotus sp. 38 μm Japan, 1998	Litonotus sp.7 conjugating pairs Japan, 1998	Litonotus sp. 47 x μm Kanazawa Ishikawa, 2002
Litonotus sp. 40-45 μm Japan, 199?	Litonotus sp. 70-75 μm Japan, 1997	Litonotus sp. 35x 14 μm Omoi river Oyama Tochigi, 2004

Similar Genus ->> Loxophyllum; Amphileptus

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