right triangular ligament right triangular ligament the right triangular ligament is situated at the right extremity of the bare area, and is a small fold which passes to the diaphragm, being formed by the apposition of the upper and lower layers of the coronary ligament. right triangular ligamentthe superior surface of the liver.detailsidentifierslatinligamentum triangulare dextrum hepatista98a10.1.02.304ta23775fma76986anatomical terminology additional images diagram to show the lines along which the peritoneum leaves the wall of the abdomen to invest the viscera.