home   Printer friendly version Add to site
Advanced search
Time & Space Fossil Gallery Famous Flora & Fauna
Careers Resources K-12 Collections PaleoPeople

Invertebrates

> Ediacaran Organisms | Sponges | Cnidarians | Arthropods | Molluscs | Brachiopods | Bryozoans | Echinoderms | Hemichordates and Chordates | Other Invertebrates

See More Images
(426 total)

Dytiscus sp.
Dytiscus sp.
© 2005 Yale Peabody Museum

Isotelus maximus
Isotelus maximus
© 1906 public domain

Tylothyris
Tylothyris
© 2003 Milwaukee Public Museum

What are Invertebrates? Invertebrates are multicellular animals without backbones. This very large group makes up 95% of living animal species, including such familiar organisms as insects, crabs, clams, and earthworms, as well as less familiar trilobites, brachiopods, and crinoids. Invertebrates dominate habitats as diverse as the deep sea, tide pools, coral reefs, rocks on stream bottoms, and soils. Although some invertebrates fossilize better than others, this group has a long fossil record, extending back to the Precambrian.

First known fossil occurrence: Precambrian.

Last known fossil occurrence: Quaternary. This group has living relatives.

Cool Invertebrates links:

Search for images of Invertebrates on Google

help