Noun: cephalaspid
- Extinct jawless fish of the Devonian with armoured head
"cephalaspids had a distinctive head shield and are thought to be closely related to modern vertebrates";
- osteostracan
Derived forms: cephalaspids
Type of: agnathan, jawless fish, jawless vertebrate
Part of: Cephalaspida, Osteostraci, suborder Cephalaspida, suborder Osteostraci
Encyclopedia: Cephalaspid