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RE: Our current understanding of Mesozoic bird phylogeny
Mickey Mortimer wrote:
862 steps- confuciusornithids as enantiornithines
Surprisingly, this reduced version of Sauriurae (which shouldn't be termed
Sauriurae, as it lacks Archaeopteryx) is highly parsimonious.
Interesting. A Confuciusornithidae+Enantiornithes clade would explain the
similar hallucal morphology between confuciusornithids and certain
enantiornitheans (like _Concornis_ and _Sinornis_). In all these taxa, the
hallux is medially/posteromedially oriented to form an incipiently or weakly
perching foot. Avisaurids show a more advanced condition, presumably
derived from this; while the perching foot of ornithuromorphs evolved
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