Definition that contains jawless vertebrate
- pisces a group of vertebrates comprising both cartilaginous and bony fishes and sometimes including the jawless vertebrates; not used technically
- order ostracodermi extinct group of armored jawless vertebrates; taxonomy is not clear
- ostracodermi extinct group of armored jawless vertebrates; taxonomy is not clear
- anaspida extinct order of jawless vertebrates
- order anaspida extinct order of jawless vertebrates
- ostracoderm extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic