The following table gives an overview of species numbers of selected invertebrate groups.

Mites are among the most diverse and successful of all the invertebrate groups.

Other invertebrate groups may be called worms, especially colloquially.

It is clear, however, that certain species are the most abundant invertebrate group in some habitats/localities.

Positive rheotaxis is found in most major aquatic invertebrate groups.

Flatworms are one of the invertebrate groups which are studied in school biology.

Other major invertebrate groups in the Yixian include clam shrimp and insects.

Various other marine invertebrate groups have members which symbiont with algae.

Recent activity has included a major update to plants, many invertebrate groups, and all vertebrates.

In them, surely, must be evidence about the origins of those three great invertebrate groups.