Arthrodira

Translingual thumb Etymology From mul grc ἄρθρον joint + grc δειρή throat. Proper noun † order class Placodermi certain extinct armored, jawed fishes en mul Sharks 14 https://books.google.com/books?isbn=8854400548 Angelo Mojetta 2004 As a result of these characteristics, the number of Placoderms rapidly increased, and they were differentiated into various evolutionary branches, the major ones being the Arthrodira and Antiarchi. Synonyms order Arthrodiriformes order Hypernyms order ; Vertebrata subphylum - subphylum; Gnathostomata - infraphylum; †Placodermi class - class Hyponyms order Phlyctaenioidei suborder clade Brachythoraci suborder suborder; Williamsaspididae family, Groenlandaspididae family, Arctolepididae family, Phlyctaeniidae family suborder and families in Phlyctaenioidei Actinolepidae family, Phyllolepida family, Wuttagoonaspidae family other families References 217761 1