Ostracoderm
= Ostracoderm
A traditional assemblage of armoured jawless <fossil> <vertebrates>. It is not a complete <clade>, and many members are stem relatives of <gnathostomes>, rather than early <cyclostomes>.
= Ostracoderm
A traditional assemblage of armoured jawless <fossil> <vertebrates>. It is not a complete <clade>, and many members are stem relatives of <gnathostomes>, rather than early <cyclostomes>.