| | New Species of Butterfly Named Over a century ago, specimens of a tiny, green-eyed butterfly were preserved in the Smithsonian entomology collection. At the time, the butterfly specimen was classified as a gray ministreak. But... Read more | The Basic Invertebrate Groups Nearly 97 percent of all known animal species are invertebrates. This article explores some of the basic groups of invertebrates including arthropods, cnidarians, echinoderms, molluscks and sponges. ... Read more | The Basic Carnivore Groups There are 249 species of carnivores alive today and these species are classify into seven groups including bears, cats, civets, raccoons, mustelids, canids and hyenas. This article explores the basic... Read more | Reptiles Reptiles are a group of vertebrates that includes crocodilians, lizards, snakes and turtles. There are about 8,000 species of reptiles alive today. Early reptiles diverged from other amniotes between 320 and 310 million years ago during the late Carboniferous Period. The articles listed below provide information about the characteristics, classification and evolution of reptiles. | | | | Related Searches | | | | Featured Articles | | | | | | Sign up for more free newsletters on your favorite topics | | | | You are receiving this newsletter because you subscribed to the About.com Animals newsletter. If you wish to change your email address or unsubscribe, please click here. About.com respects your privacy: Our Privacy Policy Contact Information: 1500 Broadway, 6th Floor New York, NY, 10036 © 2012 About.com | | | | Must Reads | | | Follow me on: | | | | Advertisement | |
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