| | Palaeos Vertebrates 390.400 Synapsida: Sphenacodontia |
 | | Dimetrodon was the dominant predator in its environment for some twenty-five million years, during which time it evolved through about a dozen species, become steadily larger as time progressed (an example of "Cope's Law"). |
 | | Dimetrodon legs, although strong, were short, so it may have hunted through ambushing its prey, the sail on the back also no doubt serving to help camoflague the creature when it hid among stands of bamboo-like Calamite plants. |
 | | Dimetrodon is such a well-known creature it's even featured in most popular books on dinosaurs (even though it is not a dinosaur, and not even related). |
| www.palaeos.com /Vertebrates/Units/Unit390/400.html (1351 words) |