Potamotrygonocotyle is a genus of monogeneans that parasitise stingrays of the genus Potamotrygon. From 1981 the genus contained only one member, Potamotrygonocotyle tsalickisi, until four new species were described in 2007.
Species Potamotrygonocotyle chisholmae Domingues & Marques, 2007 Potamotrygonocotyle dromedarius Domingues & Marques, 2007 Potamotrygonocotyle eurypotamoxenus Domingues & Marques, 2007 Potamotrygonocotyle tsalickisi Mayes, Brooks & Thorson, 1981 Potamotrygonocotyle uruguayensis Domingues & Marques, 2007
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