spirifer的翻译，读音
释义：
石燕贝属
n. Any one of numerous species of fossil brachipods of the
genus Spirifer, or Delthyris, and allied genera, in which the long
calcareous supports of the arms form a large spiral, or helix, on each
side.
n. Any one of numerous species of fossil brachipods of the
genus Spirifer, or Delthyris, and allied genera, in which the long
calcareous supports of the arms form a large spiral, or helix, on each
side.