hypaxial

1.hypaxial Any structure morphologically ventral to the chordal axis;

轴前的任何的形态结构位于脊索轴的；

2.upper postventral margin In the caudal fin, the upper part of the postventral margin of the hypaxial web, from the posterior notch to the subterminal notch.

上边缘，轴前网的边缘的上半，面凹槽到接近端位的凹槽。