单词 | 孔亚纲 |
释义 | 〔lobefin〕Any of various mostly extinct bony fishes of the subclass Crossopterygii, of which the coelacanth is a living representative.总鳍鱼:内鼻孔亚纲的各种大多已灭绝了的硬骨鱼,腔棘鱼为其现存种类代表 |
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