| subphylum = Vertebrata | subphylum_authority = Cuvier, 1812 | subdivision_ranks = Classes and Clades | subdivision = See below }} Vertebrates are members of the subphylum Vertebrata, chordates with backbones or spinal columns. The grouping sometimes includes the hagfish, which have no vertebrae, but are genetically quite closely related to lampreys, which do have vertebrae. Vertebrata is the largest subphylum of chordates, and contains many familiar groups of large land animals. Vertebrates c… (More on Vertebrata)