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.
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.
Our finds show that these extinct armored fishes, the placoderms, had intimate copulation with males inserting claspers (a structure that is part of the pelvic fin) inside the female to deposit sperm," Long said.