Chiroptera (planet)

Chiroptera was a planet inhabited by Chiropterans. (AUDIO: The Widow's Assassin)

Behond the scenes
According the information in the non-narrative source DWBIT 37, a gigantic blood-thirsty bat-like species was named Chiroptera. Their eyes were capable of emitting devastating psionic energy beams. They fought the Daleks to protect the Hellmouth.