Prehistoric times had no shortage of pretty scary creatures, but you need to look no further than this huge arthopod to find ...

This prehistoric creature was a stem-group arthropod ... the jawless agnathans and armored placoderms in the seas. Marine invertebrates like starfish, gastropods, and sea urchins flourished ...

Thank you! Within the paleontology section are two divisions, Vertebrate Paleontology and Invertebrate Paleontology (which includes fossil plants). Invertebrate Paleontology now has over 300,000 ...