Mantrap
From Tardis Wiki, the free Doctor Who reference
"Mantrap" is a title based upon conjecture.
Check the behind the scenes section, the revision history and discussion page for additional comments on this article's title.
Man-traps were large slug-like creatures created by the Dots that killed and ate the residents of Finetime, and were seen standing in the ruins of Homeworld. (TV: Dot and Bubble [+]Loading...["Dot and Bubble (TV story)"])
Behind the Scenes
While not named in the episode itself, the accompanying episode of Doctor Who: Unleashed identifies them as "man-traps".