Too whom it may concern,

I'm an illustrator, trying to become a paleoartist and have an up and coming painting to do. It's based around Dimetrodon. I've done some research on them and was trying to work out a question that arose. My question is, if Dimetrodon became too hot from sunbathing, would it open it's mouth to cool down? I know crocodiles do this, and I'm just going on an educated guess. I figure someone in this field could guide me in the right direction.

Thank you for your time!

Patrick

Hi Patrick,

  That sort of detailed palaeobiological question is really hard to test from fossils.  That said, I think you've made a pretty logical, sound, inference from modern reptiles.  It seems to me that you'd be justified in depicting dimetrodon this way.