Invertebrate paleontology

From EvoWiki

Invertebrate paleontology, obviously, is the study of the fossils of invertebrates. Many invertebrate groups have extensive fossil histories, including mollusks, arthropods (trilobites, in particular), brachiopods, corals, and echinoderms.

One of the primary ways invertebrate paleontology is important to the evolution debates is as stratigraphic markers. Because many invertebrates (esp. mollusks) evolve quickly, fossilize readily, and become quite widely spread, they are excellent markers for determining the age of fossil beds not readily dated by other methods.

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