Smithsonian Institution
National Museum of Natural History: Department of Invertebrate Zoology
Search the Invertebrate Zoology Collection, and read about original research performed on all 30 major invertebrate animal phyla except insects.
CK-12 Foundation
Ck 12: Biology: Invertebrate Evolution
[Free Registration/Login may be required to access all resource tools.] An overview of the major events in invertebrate evolution.
CK-12 Foundation
Ck 12: Biology: Invertebrates: Overview Study Guide
Use this illustrated overview of invertebrates for review.