In this study ultrastructures of Balantidium elongatum and B.duodeni obtained from the digestive system of Rana ridibunda have been examined. In addition to the kinetodesmal fibril and microtubular fibrils orijinating from each kinetosome, a vacuolar zone, microtubular bundles and other cytoplasmic structures have been described by electron microscopy.

In this study ultrastructures of Balantidium elongatum and B.duodeni obtained from the digestive system of Rana ridibunda have been examined. In addition to the kinetodesmal fibril and microtubular fibrils orijinating from each kinetosome, a vacuolar zone, microtubular bundles and other cytoplasmic structures have been described by electron microscopy.