crossopterygian fishes总鳍鱼类
Crossopterygian fish一种鳍里有骨头的鱼
N（名词） any bony fish of the subclass Crossopterygii, having fleshy limblike pectoral fins. The group, now mostly extinct, contains the ancestors of the amphibians 总鳍鱼 → see also coelacanth
ADJ（形容词） of, relating to, or belonging to the Crossopterygii 总鳍鱼的