Allassostoma Stunkard, 1916 (original description)
Allassostoma magnum Stunkard, 1916 (original description)
Allassostoma parvum Stunkard, 1916 accepted as Allassostomoides parvus (Stunkard, 1916) Stunkard, 1924 (original description)
Polystoma megacotyle Stunkard, 1916 accepted as Polystomoides coronatum (Leidy, 1888) Ozaki, 1935 accepted as Polystomoides coronatus (Leidy, 1888) Ozaki, 1935 (original description)
Polystoma microcotyle Stunkard, 1916 accepted as Polystomoides coronatum (Leidy, 1888) Ozaki, 1935 accepted as Polystomoides coronatus (Leidy, 1888) Ozaki, 1935 (original description)
Polystoma opacum Stunkard, 1916 accepted as Polystomoides coronatum (Leidy, 1888) Ozaki, 1935 accepted as Polystomoides coronatus (Leidy, 1888) Ozaki, 1935 (original description)
Polystoma orbiculare Stunkard, 1916 accepted as Neopolystoma orbiculare (Stunkard, 1916) Price, 1939 accepted as Polystomoides orbiculare (Stunkard, 1916) Chaabane, Du Preez, Johnston & Verneau, 2022 (original description)
Zygocotyle Stunkard, 1916 (original description)
Zygocotyle ceratosa Stunkard, 1916 (original description)