单词：placodermi
盾皮鱼
n. pl. An extinct group of fishes, supposed to be ganoids.
The body and head were covered with large bony plates. See Illust.
under Pterichthys, and Coccosteus.
The body and head were covered with large bony plates. See Illust.
under Pterichthys, and Coccosteus.
词型变化：名词复数形式 : placodermis