<tr><td>Kingdom:<td>Animalia
<tr><td>Phylum:<td>Chordata
<tr><td>Subphylum:<td>Vertebrata
<tr><td>Class:<td>Placodermi
</table>
<tr><th bgcolor=pink>Orders
<tr><td>
Antiarchi †
Arthrodira †
Petalichthyda †
Phyllolepida †
Ptyctodontida †
Rhenanida †
</table>
Placodermi is an extinct class of jawed fish with bony armour plating on their head and neck. The placoderms died out at the end of the Devonian period.