FIGURE 2 in The invasive alien freshwater FLatworm Girardia tigrina (Girard, 1850) (Platyhelminthes, Tricladida) in Western Europe: new insights into its morphology, karyology and reproductive biology

FIGURE 2 Girardia tigrina from Liguria. Photomicrographs of the pharynx; sagittal sections (anterior to the left). A. ZMA V.Pl. 7283.1, mouth opening located at the hind end of the pharyngeal pocket; B. CGAS Pla 18.1, mouth opening located at about 1/6 of the distance between the posterior end of the pharyngeal pouch and the root of the pharynx; C. CGAS Pla 18.2, mouth opening located about at 1/4 of the distance between the posterior end of the pharyngeal pouch and the root of the pharynx.