List of prehistoric cartilaginous fish genera Cosmoselachus Cladodus Barbclabornia Ctenacanthus Symmorium Plesioselachus Dwykaselachus Gyracanthidae Goodrichthys Ptomacanthus Mesacanthus Glikmanius Plicatodus Tetanopsyrus Adamantina (fish) Aztecodus Altholepis Gladbachus Brochoadmones Triodus Saivodus Cheiracanthus Nerepisacanthus Kawichthys Cobelodus Poracanthodes Acanthodes Climatius Avonacanthus Podoliacanthus Bransonella Nostolepis Gogoselachus Phoebodus Ferromirum Triazeugacanthus Fanjingshania Elegestolepis Dracopristis Falcatidae Acanthodopsis Ozarcus Kaibabvenator Gyracanthides Squatinactis Arduodens Mcmurdodus Xylacanthus (fish) Mongolepidida Maghriboselache Cladodoides Falcatus Symmoriidae Qianodus Akmonistion Gyracanthus Isch…

hnacanthus Lebachacanthus Thrinacodus Xenacanthus Acanthodiformes Parexus Orthacanthus Phoebodontiformes Diplacanthiformes Ischnacanthiformes Cladoselachidae Stethacanthus Climatiiformes Xenacanthida Ctenacanthiformes Acanthodii Cladoselache Symmoriiformes Diplacanthus Antarctilamna