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In a message dated 4/11/2005 7:12:02 A.M. Pacific Standard Time, MccarrickAD@nswccd.navy.mil writes: >>If I understand it correctly, birds are thought to be closely related (derived from or cousins with) the small theropod dinosaurs. But theropods are part of sauriscia, the "lizard hipped" clad. Are ave hips really like ornithicia ? Is there a disconnect here, or are my understanding of dinosaur clads incorrect. (Forgive my spelling) Am I being to simple minded here ?<< I have it the other way round: birds evolved sometime during the Late Permian as a divergent group of feathered, arboreal prolacertiforms, and all dinosaurs are giant, terrestrial descendants of various progressively more modern forms from that lineage. I'm working on a book about this.
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