placoderm
pl: placoderms
Related Words
fishagnathanchondrichthyesosteichthyessharkraysturgeonlampreyhagfishpaleontologyfossilextinctiondevoniansilurianprehistoricarmorplatescaledermalbonecartilageskeletonjawgnathostomegillfinspinecraniumthoraxabdomenpredatorpreyoceanseamarineaquaticsedimentstratageologyevolutionphylogenytaxonomygenusspeciescladogrammorphologyanatomytrilobitebrachiopodcephalopodammonitecrinoidgastropodbivalvechordatevertebratesuperclassclassorderfamilyextinctancientprimitiveadaptationdivergencespeciationbiodiversityecosystempaleoecologybiostratigraphymineralizationpermineralizationcalcificationphosphoriteshalelimestone