antihelix antihelix the antihelix (anthelix) is a part of the visible ear; the pinna. the antihelix is a curved prominence of cartilage parallel with and in front of the helix on the pinna. antihelixthe auricula. lateral surface.identifiersta98a15.3.01.009ta2109fma60995anatomical terminology the antihelix divides above into two legs or crura; the crura antihelicis, between which is a triangular depression, the fossa triangularis. additional images the muscles of the auricula. left human ear external ear. right auricle. lateral view. external ear. right auricle. lateral view. external ear. right auricle. lateral view.