Question

Which class of Annelida does not have setae?

Answer 1

Annelids that do not have setae:

1. Annelida also called a segmented worm, is any member of a phylum of invertebrate animals.
2. They are characterised are by the possession of a body cavity (or coelom), movable bristles (or setae), and a body divided into segments by transverse rings, or annulations.
3. The animals of class Hirudinea of the phylum annelids do not have setae.
4. All annelids except the leeches have chitinous hair-like structures, called setae that project out from their cuticle.
5. The setae can also be located on paddle-like appendages which are called parapodia.