Genus: Flask-shaped; ciliation uniform and complete; slit-like cytostome not reaching the middle of body,
without trichocyst-borders; two or more macronuclei (Kudo, 1966).
Many contractile vacuoles along both dorsal and ventral edges (Carey, 1992).
Amphileptus lanceolatus Dragesco, 1965: lanceolate in form; 120 μm long; pointed both anteriorly and posteriorly; no elongate neck region; trichocysts in the buccal region and also scattered throughout cytoplasm; mucocysts present; a macronucleus consisting of two spherical bodies with a intercalated micronuleus; a single contractile vacuole with satellite vacuoles (Carey, 1992).
Amphileptus inquieta (Biernacka, 1963): 170-200 μm long; with an elongate neck & rounded posterior; a row of four contractile vacuoles present laterally; two large spherical macronuclei (Carey, 1992).