Buccal field extending to 35–40% ofbody length with buccal cilia about 5 ?m long. Pellicle forming longitudinal ridges between somatic kineties. Extru-somes bar-shaped, about 4 ?m long. Endoplasm containingnumerous (ca 3 ?m across) food vacuoles and dumbbell-shaped crystals (Fig. 4J).