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)

Philohedra sp.  and Orthospirifer cooperi
Philohedra sp. and Orthospirifer cooperi
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum

Eupatagus antillarum
Eupatagus antillarum
© 2008 Tom Maier

Foerstediscus grandis
Foerstediscus grandis
© 2006 Joe Koniecki

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