Polystomoidella hassalli
Animalia | Platyhelminthes | Trematoda | Polyopisthocotylea | Polystomatidae | Polystomoidella | Polystomoidella hassalli
Polystomoidella oblonga
Biota | Animalia | Platyhelminthes | Rhabditophora | Neodermata | Monogenea | Polyopisthocotylea | Polystomatidea | Polystomatidae | Polystomoidinae | Polystomoidella | Polystomoidella oblonga
|  | Minot, 1876 | Ehlers, 1985 | Ehlers, 1985 | Van Beneden, 1858 |  | Lebedev, 1988 | Gamble, 1896 | Yamaguti, 1963 | Price, 1939 | (Wright, 1879) Price, 1939