Re: the start

[MICHAEL.ERNST@tigerteam.org (MICHAEL ERNST)]

 U > Gary, dinosaurs belong to a group of reptiles called Archosaurs which
 U > evolved
 U > from reptiles called thecodonts during the middle/late Triassic.
 U > Archosaurs include all Dinosaurs, pterosaurs (winged reptiles), birds,
 U > and
 U > Crocodilians.  Thecondonts evolved from early Diapsid reptiles.

Was dimetrodon a thecodont?  What separates thecodonts from Archosaurs,
besides hip structure?  Have thecodonts sometimes been called
"mammal-like reptiles"?  If so, why?  I know "dont" refers to teeth,
what does "theco" refer to?

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