pelycosaur
| Primitive mammal-like reptiles found in the late Carboniferous and Lower Permian strata of Texas and elsewhere. |
| Some forms of pelycosaur, such as dimetrodon, had long spines down the back, probably connected by membranes to form a ‘sail’; this was probably a heat-regulating device. |
How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
| ?Page tools | ||
|---|---|---|
|
?Sign in  |
|---|