Arthrodira (Woodward, 1891) Dataset The Paleobiology Database Rank ORDER Classification phylum Chordata class Placodermi order Arthrodira Name Synonyms Arthrodira (Woodward, 1891) Arthrodiriformes Grande & Eastman, 1986 Homonyms Arthrodira (Woodward, 1891) Arthrodira (Woodward, 1891)