Ursulan
From Tardis Wiki, the free Doctor Who reference
Ursulans were the native species of Ursu. They were created from Blooms placed on the planet by the Ursu Group and due to this could not reproduce. Male Ursulans could however reproduce with other species. (PROSE: Beyond the Sun)
Behind the scenes
Matt Jones named Ursulans after Ursula K. Le Guin. (REF: The Big Finish Companion: Volume 1)