The Centidile is a species of Nanodragon that is mentioned in The Incomplete Book of Dragons.
The Centidile somewhat resembles a long-legged spider with a bat head, similar to the Prickleboggle. Not much is known about the Centidile beyond its picture.
Like all Nanodragons, the Centidile did not partake in the Dragon Rebellion.
Only a labeled picture of a Centidile appears in this reference book in the section detailing Nanodragons.