The Tagrans were the humanoid inhabitants of the planet Tagra IV. Their appearance was marked by facial ridges across their cheeks stemming from four nostrils, that continued over their nose and up the side of their face.
In 2369, the Tagrans requested assistance from the United Federation of Planets to help repair the ecological damage to their homeworld caused by pollution. During the USS Enterprise-D's visit, they worked with Engineer Orn Lote. (TNG: "True Q")