Understanding Evolution: your one-stop source for information on evolution
Resource library Teaching materials Evolution 101
print print
The Arthropod Story Table of Contents   

The Arthropod Defined

We've seen that arthropods are a whole lot more than just cockroaches and lobsters. However, all those descendents of the arthropod ancestor share certain key characteristics that they inherited from that ancestor. Using the information from this section you should be able to tell if an animal is an arthropod based on whether or not it inherited the key arthropod traits.

mantis millipede
hermit crab butterfly

Now that we have a good idea of what an arthropod is, let's go way back to the Cambrian Period and take a look at arthropod origins.


previous
A closer look at the arthropod branches

  next
Meet the Cambrian critters


Mantis photo © 2004 Joyce Gross; Millipede and hermit crab photos © 2004 William Leonard; Butterfly photo by T. W. Davies © California Academy of Sciences

previous | next  >