cestode Cestoda 58 Animals 54 article 52 Argentina 46 Fish Diseases 40 nonhuman 38 Cestode Infections 36 animal 32 parasitology 32 classification 28 Microscopy, Electron, Scanning 26 ultrastructure 20 Chondrichthyes 18 Skates (Fish) 18 cestodiasis 18 fish disease 18 new species 18 species difference 18 Female 16 Intestines 16 Tetraphyllidea 16 animal disease 16 flatworm 16 morphology 16 scanning electron microscopy 16 Proteocephalidea 14 female 14 histology 14 Candidatus Microthrix 12