Small Animal Care & Management - Fourth Edition - 5

Introduction to Small Animal Care
Negative #325025 (Photo by Rota), Courtesy Department of Library Services,
American Museum of Natural History

Chapter 1

Coelacanth, a primitive, lobe-finned, bony fish that some
believe may be the ancestor of land animals. Coelacanth was thought to be
extinct until some living specimens were discovered off the East Coast of
South Africa.

Figure 1-2

Courtesy Department of Library Services, American Museum of Natural History

agree that birds and dinosaurs are closely related. However, there is controversy among paleontologists about how they are related. One theory
suggests that birds are a branch of the dinosaur family tree that survived the
Cretaceous period and evolved into the forms we see today.
A second theory suggests that birds and dinosaurs had a common ancestor that evolved into both groups. See Figures 1-3 and 1-4.
Archaeopteryx is believed to be one of the ancestors of modern birds. It
lived 150 million years ago during the Jurassic period. In 1860, a fossilized

Archaeopteryx is one of the ancestors of modern birds. It lived 150 million years
ago during the Jurassic period. This fossil was
discovered in a Bavarian stone quarry.

Figure 1-3

5



Table of Contents for the Digital Edition of Small Animal Care & Management - Fourth Edition

Contents
Small Animal Care & Management - Fourth Edition - Cover1
Small Animal Care & Management - Fourth Edition - Cover2
Small Animal Care & Management - Fourth Edition - iii
Small Animal Care & Management - Fourth Edition - iv
Small Animal Care & Management - Fourth Edition - Contents
Small Animal Care & Management - Fourth Edition - vi
Small Animal Care & Management - Fourth Edition - vii
Small Animal Care & Management - Fourth Edition - viii
Small Animal Care & Management - Fourth Edition - ix
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Small Animal Care & Management - Fourth Edition - Cover4
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