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The Basic Invertebrate Groups
About 97 percent of all known animal species are invertebrates. Many of these species are classified in one of eight basic groups (although it should be noted that these basic groups provide a simple overview of invertebrates; there are in fact over 30 phyla of invertebrates). This article explores invertebrate classification in order to better understand the diversity and common characteristics of invertebrates.
| A Guide to Vertebrates and Invertebrates
Animal classification is a matter of sorting out similarities and differences, of placing animals in groups and then breaking those groups apart into subgroups. The whole endeavor creates a structure--a hierarchy in which the large high-level groups sort out bold and obvious differences, while the low-level groups tease apart subtle, almost imperceptible, variations.
| Invertebrate Pictures
Pictures of invertebrates, including invertebrate photos such as jellyfish, ladybugs, snails, spiders, octopus, chambered nautiluses, mantis and more.
| Facts About Invertebrates
In this article, you'll learn interesting facts about invertebrates and find out about their unique characteristics, their life cycle and their evolutionary history.
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