Antiarchi †
Arthrodira †
Petalichthyda †
Phyllolepida †
Ptyctodontida †
Rhenanida †

The Placodermi are fish known from fossils dating to the Devonian period. The front of its body and head were covered by armoured plates and the rest of its body was scaled or naked.

See also

• Ostracoderm
• Pterichthyodes - a genus of Placodermi.