Estrella Mountain Community College
Estrella Mountain Community College: Phylum Annelida
This section (in table of contents as "Phylum Annelida: Segmented Worms") gives a description of how segmented worms developed certain characteristics as well as it explains the differences in the evolution of different classes of...
Earth Life
Earth Life Web: The Phylum Annelida
Beginning with a list of characteristics, this website from Earth-Life Web welcomes you to the amazing world of annelids. After discussing some of the 9,000 different worms included in this phylum, links to the classes polychaeta,...