This is a preview. Log in through your library . Abstract Abstract The gill morphologies of six species of potamotrygonid freshwater stingrays from the Amazon basin were investigated using light and ...
Two new tetraphyllidean cestodes are described from the freshwater stingray Potamotrygon magdalenae from Colombia. The new genus Potamotrygonocestus is proposed for P. magdalenensis, which differs ...
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