Phylum Annelida
General characteristics
Class in the phylum Annelida
Class Polychaeta: paired lateral outfoldings of the body wall
Typical polychaete - Nereis sp.
Scanning electron micrograph of a polychaete prostomium
Gross anatomy is very similar to that of an earthworm
Cross-sections of Nereis and an earthworm
Polychaete reproduction
Two forms of epitoky
PPT Slide
Class Clitellata
Subclass Oligochaeta
Oligochaete Reproduction
Subclass Oligochaeta includes the familiar earthworm, Lumbricus terrestris.
Subclass Hirudinea
Leeches are generally ectoparasitic
Class Pogonophora (beard bearer)
Body plan of Pogonophora
Class Echiura
Other features of the class Echiura
Email: seisen
Home Page: http://www.cbu.edu/~seisen/
Other information: Phylum Annelida