class Placodermi

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Noun1.class Placodermi - extinct group of bony-plated fishes with primitive jaws
Craniata, subphylum Craniata, subphylum Vertebrata, Vertebrata - fishes; amphibians; reptiles; birds; mammals
placoderm - fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws
class - (biology) a taxonomic group containing one or more orders
References in periodicals archive ?
Class PLACODERMI M'Coy, 1848 Order ARTHRODIRA Woodward, 1891 Family DUNKLEOSTEIDAE Stensio, 1963 Genus Dunkleosteus Lehman, 1956