Genus (Perty, 1849): Oral cavity large, over most of ventrum; oral cilia as 1 long polykinetid (Illustrated Guide, 1985). Oval; dorsal side convex, ventral side concave; cytostome 3/4 to 4/5 the body length; on its left with a large membrane composed of may ciliary rows; contractile vacuole in mid-dorsal region; macronucleus ellipsoid, subterminal; a micronuleus; caudal cilia (Kudo, 1966).

L. bullinum 4 clips 90 x 47 μm Japan, 1998

L. lucens 10 clips μm Japan, 1998

L. lucens 4 clips μm Japan, 1998

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