The Centidile is a species of Nanodragon. It 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.
References
- The Complete Book of Dragons: A Guide To Dragon Species, Cressida Cowell. 2014