Suborder: Paroral dikinetid shorter than other oral structures; no ribbed wall from paroral dikinetids towards cytostome (Illustrated Guide, 1985). Family: Genus: Small, slender, ovoid or pyriform in shape; dorsal rounded, ventral flattened; large buccal cavity from anterior to the mid-point of the body; two long membranelles parallel on the right margin of the buccal cavity; a long caudal cilium; a single macronucleus (Carey, 1992).

50 μm 100 μm 150 μm; x 400