FIGURE 4 in Comparison of the predatory rotifers Pleurotrocha petromyzon (Ehrenberg, 1830) and Pleurotrocha sigmoidea Skorikov, 1896 (Rotifera: Monogononta: Notommatidae) based on light and electron microscopic observations

FIGURE 4. SEM images of the trophi of Pleurotrocha sigmoidea. A, ventral view. B, dorsal view. C, lateral view. D, laterofrontal view. al alula, ca cauda, cl clava, fu fulcrum, man manubrium, odmc opening of dorsal manubrial chamber, ommc opening of median manubrial chamber, ovmc opening of ventral manubrial chamber, rbc ramus basal chamber, rfb ramus foramen basalis, rfsb ramus foramen subbasalis, rsbc ramus subbasal chamber, un uncus. Arrow (projection of ventral manubrial chamber).