cephalaspida

• 指已灭绝的甲胄鱼形脊椎动物类群，其分类地位尚不确定。

A scientific term referring to an extinct group of armored, fish-like vertebrates, whose taxonomic classification remains uncertain.

不可数 · 专有名词

1. Extinct armored fish-like vertebratesC2formalscientific

   An extinct group of jawless, fish-like vertebrates that lived during the Paleozoic era, characterized by a bony head shield.

   头甲鱼纲

   • Cephalaspida are known from fossils found in marine sediments.
   • The head shield of Cephalaspida was often covered with bony plates.
   • Paleontologists study Cephalaspida to understand early vertebrate evolution.