Mastigamoeba longifilum Stokes
Diagnosis: Body elongate, transparent, very changeable in shape, with few, short, indeterminate pseudopods; cilium active, long, twice body length; contractile vacuole anterior; nucleus anterior, small.
Dimensions: Body 12-28 µm long when extended, contracted about 10 µm.
Ecology: standing water among decaying vegetation.
L. gibbosa, after Thomas and Gauthier-Lièvre, 1959 Lesquereusia gibbosa Thomas et Gauthier-Lièvre, 1959 Diagnosis: At the base of the neck there is a clear constriction,
L. extranea, after Thomas and Gauthier-Lièvre, 1959 Lesquereusia extranea Awerintzew, 1906 Diagnosis: Generally, the test resembles that of L. epistomium, but it also presents intermediate
L. carinata. The two small drawings to the left are after Playfair, 1917, the others after Thomas and Gauthier-Lièvre, 1959. Lesquereusia carinata Playfair, 1917 Diagnosis:
L. bispiralis, after Thomas and Gauthier-Lièvre, 1959 Lesquereusia bispiralis Thomas et Gauthier-Lièvre, 1959 Diagnosis: Neck with two septa. The neck is not cylindrical or conical,
L. angulata, after Thomas and Gauthier-Lièvre, 1959 Lesquereusia angulata Awerintzew, 1906 Diagnosis: The neck is long and straight and does not taper towards the aperture;
L. globulosa, after Thomas and Gauthier-Lièvre, 1959 Lesquereusia globulosa Thomas et Gauthier-Lièvre, 1959 Diagnosis: Main part of the test spherical, not compressed, with a large