in Temnocephala, [54];

in Polystomatidae and Tristomatidae, [56];

in Distomum luteum, [62];

in Cestodes, [86];

in Nemertinea, [108], [109];

in Rotifers, [213];

in Urnatella, [491]

Fletcherodrilus, [382]

Floscularia, [200], [203], [205], [220], [221], [226]

Flosculariaceae, [202], [211], [213], [220]