Armored Fishes

Armored Fishes

 

a group of fishes that formerly united the extinct classes Ostracodermi and Placodermi. The fishes were characterized by a bony external armor that partially or completely covered the head and the anterior part of the trunk.

References in periodicals archive ?
Lead author Min Zhu, of the Chinese Academy of Sciences' Institute of Vertebrate Paleontology and Paleoanthropology, added that entelognathus was "a placoderm, an extinct grade of primitive armored fishes."
Coverage begins with background information about earth, rocks, and evolution, then proceeds through chapters on the origins of "glorified swimming worms" and the first vertebrates, "jawless wonders" (hagfishes, lampreys), "armored fishes and fishes with arms," and so on through the development of air breathing, big teeth, and life on land.
Furthermore, the analysis demonstrated that all of these early members of the modern gnathostomes are clearly separated from what now appear to be the most primitive vertebrates with jaws: a collection of armored fishes called placoderms.