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Viva Neornithine Birds!
"If accurate, despite the vulnerability of such data to suboptimal rooting,
this record undermines early anticipations of K?T boundary effects in modern
orders and an evolutionary timespan in which major divergences of neornithine
lineages would extend through the early and middle Cenozoic." from Higher-order
phylogeny of modern birds (Theropoda, Aves: Neornithes) based on comparative
anatomy. II. Analysis and discussion
BRADLEY C. LIVEZEY , RICHARD L. ZUSI
Zoological Journal of the Linnean Society
January 2007 - Vol. 149 Issue 1
Well, I hope not, because this would mean neornithines were special.