hypocercal

常见例句

• hypocercal fin
  反歪尾鳍
• hypocercal Caudal fin shape in which the lower lobe is larger and often more posteriorly directed than the upper lobe. Asymmetrical externally as well as internally, e.g. Pteraspides (fossil).
  下叶长尾形尾鳍形状在下面的叶是较大的，与时常较上叶更向后突出。不对称在外部以及内部，例如鳍甲鱼纲(化石)。
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