A member of the Branchiostegi, an old order of cartilaginous fishes having free gills covered by a membrane.
| 单词 | θ36643 |
| 释义 | the world > animals > fish > superclass Agnatha > [noun] > class Chondrichthyes > member of order Branchiostegi (1) branchiostegan1847 A member of the Branchiostegi, an old order of cartilaginous fishes having free gills covered by a membrane. |
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