Bighead spurdog  (Squalus bucephalus)

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->
    • Squaliformes - Sleeper and dogfish sharks->

      • Squalidae - Dogfish sharks->

        • Squalus - Dogfish sharks->

          • Spiny dogfish (Squalus acanthias)
          • Pacific spiny dogfish (Squalus suckleyi)
          • Brazilian whitetail dogfish (Squalus albicaudus)
          • Eastern highfin spurdog (Squalus albifrons)
          • Western highfin spurdog (Squalus altipinnis)
          • Northeastern Brazilian dogfish (Squalus bahiensis)
          • Long-snouted African spurdog (Squalus bassi)
          • Longnose spurdog (Squalus blainville)
          • Squalus brevirostris (Squalus brevirostris)
          • Bighead spurdog (Squalus bucephalus)
          • Greeneye spurdog (Squalus chloroculus)
          • Genie’s dogfish (Squalus clarkae)
          • Fatspine spurdog (Squalus crassispinus)
          • Cuban dogfish (Squalus cubensis)
          • Edmund’s spurdog (Squalus edmundsi)
          • Taiwan spurdog (Squalus formosus)
          • Eastern longnose spurdog (Squalus grahami)
          • Northern spiny dogfish (Squalus griffini)
          • Hawaiian spurdog (Squalus hawaiiensis)
          • Indonesian shortsnout spurdog (Squalus hemipinnis)
          • Japanese spurdog (Squalus japonicus)
          • Squalus lalannei (Squalus lalannei)
          • Atlantic lobefin dogfish (Squalus lobularis)
          • Malagasy skinny spurdog (Squalus mahia)
          • Smith’s dogfish shark (Squalus margaretsmithae)
          • Shortnose spurdog (Squalus megalops)
          • Blacktailed spurdog (Squalus melanurus)
          • Shortspine spurdog (Squalus mitsukurii)
          • Indonesian greeneye spurdog (Squalus montalbani)
          • Western longnose spurdog (Squalus nasutus)
          • Bartail spurdog (Squalus notocaudatus)
          • Humpback Western dogfish (Squalus quasimodo)
          • Cyrano spurdog (Squalus rancureli)
          • Kermadec spiny dogfish (Squalus raoulensis)
          • Shirai’s spurdog (Squalus shiraii)
        • Cirrhigaleus - Cirrhigaleus->
      • Somniosidae - Sleeper sharks->
      • Etmopteridae - Lantern sharks->
      • Centrophoridae - Gulper sharks->
      • Dalatiidae - Sleeper sharks->
      • Oxynotidae - Rough sharks->
    • Echinorhiniformes - Bramble sharks->
    • Pristiophoriformes - Saw sharks->
  • Holocephali - Chimaeras->
• Agnatha - Jawless fishes->