-
of animals having no jawOpposite:
Definition that contains jawless
- pisces a group of vertebrates comprising both cartilaginous and bony fishes and sometimes including the jawless vertebrates; not used technically
- order anaspida extinct order of jawless vertebrates
- heterostracan extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian
- ostracodermi extinct group of armored jawless vertebrates; taxonomy is not clear
- cephalaspid extinct jawless fish of the Devonian with armored head
- order cyclostomata primitive jawless aquatic vertebrate: lampreys; hagfishes
- ostracoderm extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
- cyclostomata primitive jawless aquatic vertebrate: lampreys; hagfishes
- order ostracodermi extinct group of armored jawless vertebrates; taxonomy is not clear
- suborder heterostraci extinct group of armored jawless fishes or fish-like vertebrate; taxonomy is not clear