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: Long, thin and contractile; cell body is 200 μm long with a very long and thin neck region and pointed tail; laterally compressed; two macronuclei; a large contractile vacuole with small satellites (Carey, 1992). 500 μm long (Kahl, 1931).

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Two macronuclei
L. cygnus by Dirk Klos 200-300 μm sewage plant Bavaria Germany, 2004	L. cygnus 217-350 μm Japan, 1997	L. cygnus feeding, cell division Japan, 1997	L. cygnus 350 μm Japan, 1998
L. cygnus 330 x 25 μm Kurome river Asaka Saitama, 2006	L. cygnus 310 μm Saitama, 2000	L. cygnus cell μm Japan, 1998	L. cygnus cell μm Japan, 1998
L. cygnus μm Takamatsu Kagawa, 2002	L. cygnus μm Tama river Setagaya ku Tokyo, 2004	L. cygnus μm Koma river Sakado Saitama, 2003	L. cygnus 210 x 30 μm Imou bog Toyohashi Aichi, 2004
L. cygnus ? 160 x 25 μm Myoyo Fukiage Saitama, 2004

Similar Genus ->> Loxophyllum; Amphileptus

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