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Message * Articles On Placoderms, including Pterichthyodes, Placodermi, Dunkleosteus, Ctenurella, Arthrodira, Bothriolepis, Groenlandaspis, Coccosteus, Petalichthyida, Rhenanida, Gemuendina Stuertzi, Antiarchi, Stensioella, Pseudopetalichthyida - 1243190310 - 9781243190314