Chætodonidæ (ketodonide)

pl. Same as Chætodontida as used by former writers. Swain son, 1839. chætodont (kē tō-dont), a. and n. I. a. Per- taining to the Cha to don to idea or Chœtodontida . Sir J. Richardson. phoral .) An ordinal or other group of gephy- reans which have chatæ or setæ. They are char- acterized by having two strong ventral bristles, the mouth at the base of the proboscis, and the anus terminal. The II. n. Same as chatodontid . group contains the families Echiuridæ and Bonelliidæ , and is distinguished from Achæta. Also called Armata.