The copulatory organ or clasper of elasmobranchii and holocephali ; rod-like extensions of the inner side of the pelvic fins .
交配的器官或板鳃亚纲与全头亚头的鳍脚；腹鳍内部侧边的竿状延长物。
Ventral marginal in the clasper skeleton , a flat semicylindrical cartilage that is partially fused to the lateral edge of the axial cartilage , and forms the lateral wall of the clasper groove .
