diphycercal
1. diphycercal tail
圆尾
2. diphycercal fin
圆尾(鳍)
3. Diphycercal tail, i.e. vertebral colum runs straight to the tip, dividing the caudal fin symmetrically.
对称的尾部, 也就是脊柱笔直延伸到尖端,对称地分开尾鳍。