Placodermian
"Placodermian" in a Sentence (3 examples)
Furtheron the ancient agnathian and the placodermian fishes disappeared.
Many organisms were affected including conodonts, ammonoids, echinoderms, trilobites, ancient agnatian and placodermian fishes, continental plant communities, ostracodes, […]
It mainly affected pelagic and hemipelagic organisms (e.g. conodonts, ammonoids, echinoderms, trilobites, ancient agnathan and placodermian fishes), […]