Long-tailed river stingray  (Plesiotrygon iwamae)

Taxonomy of Fishes

• Osteichthyes - Bony fishes->
• Chondrichthyes - Cartilaginous fishes->

  • Elasmobranchii - Sharks and Rays->

    • Lamniformes - Mackerel sharks->
    • Carcharhiniformes - Ground sharks->
    • Rhinopristiformes - Shovelnose rays->
    • Torpediniformes - Electric rays->
    • Rajiformes - Skates and rays->
    • Orectolobiformes - Carpet shark->
    • Squatiniformes - Angelsharks->
    • Heterodontiformes - Bullhead and horn sharks->
    • Hexanchiformes - Six-gill sharks->
    • Myliobatiformes - Stingrays->

      • Dasyatidae - Stingrays->
      • Mobulidae - Manta rays->
      • Potamotrygonidae - Southamerican freshwater stingrays->

        • Potamotrygon - Potamotrygon->
        • Plesiotrygon - Antenna rays->

          • Black-tailed antenna ray (Plesiotrygon nana)
          • Long-tailed river stingray (Plesiotrygon iwamae)
        • Heliotrygon - Heliotrygon->
        • Paratrygon - Paratrygon->
        • Styracura - Styracura->
      • Gymnuridae - Butterfly rays->
      • Myliobatidae - Eagle ray->
      • Urotrygonidae - American round stingrays->
      • Aetobatidae - Pacific eagle rays->
      • Hexatrygonidae - Sixgill stingrays->
      • Plesiobatidae - Deepwater stingrays->
      • Rhinopteridae - Cownose rays->
      • Urolophidae - Round rays->
      • Zanobatidae - Panrays->
    • Squaliformes - Sleeper and dogfish sharks->
    • Echinorhiniformes - Bramble sharks->
    • Pristiophoriformes - Saw sharks->
  • Holocephali - Chimaeras->
• Agnatha - Jawless fishes->