Animals 4 Argentina 4 Cestoda 4 Intestines 4 Microscopy, Electron, Scanning 4 Phyllobothriidae 4 Rajidae 4 Skates (Fish) 4 Tetraphyllidea 4 article 4 cestode 4 morphology 4 nonhuman 4 Alopias 2 Arhynchobatinae 2 Atlantoraja castelnaui 2 Bathyraja 2 Bathyraja eatonii 2 Bathyraja maccaini 2 Cestode Infections 2 Echeneibothriinae 2 Eucestoda 2 Female 2 Fish Diseases 2 Guidus 2 Histocytochemistry 2 Male 2 Marsupiobothrium 2 Marsupiobothrium alopias 2 Marsupiobothrium awii 2