Systematics and phylogeny of Potamotrygonocestus (Platyhelminthes, Tetraphyllidea, Onchobothriidae) with descriptions of three new species from freshwater potamotrygonids (Myliobatoidei, Potamotrygonidae). Zoologica Scripta, 32, 367–396
DOI: 10.1046/j.1463-6409.2003.00111.x
