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| border of oval fossa (limbus fossae ovalis); limbus of fossa ovalis (limbus fossae ovalis); margin of fossa ovalis (limbus fossae ovalis); Vieussens limbus (limbus fossae ovalis); Vieussens anulus (limbus fossae ovalis); Vieussens isthmus (limbus fossae ovalis); Vieussens ring (limbus fossae ovalis); anulus ovalis (limbus fossae ovalis) | |||