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Re: K-Pg extinction global firestorms
And according to Phillips et. all (2009) four separate paleognath
> lineages survived the K-T event.
So? What calibration dates did they use?
et al. = et alii = and others
As your reference, Brown and van Tuinen (2011) note in figure 12.1,
> anseriforms and galliforms may have diverged 80 mya.
Again, based on what evidence?
*Vegavis*, itself less than 70 Ma old, doesn't count anymore: the latest
phylogenetic analysis of Mesozoic birds (part of the redescription of
*Chaoyangia*; Journal of Systematic Palaeontology, online-early; Jingmai
O'Connor is one of the authors, probably the first) finds it outside of
what should be called Gallanseres. (Possibly even outside Neornithes,
because there aren't any other neornitheans in the matrix.)
If we bear in mind that bird fossils are extremely rare and that the
> record is skewed, it is wholly plausible that Lithornithids and/or
> Palaeotididae (in which Mayr included Remiornis) simply dispersed
> into Eurasia after the K-T, and that ostriches could have arisen in
> Africa and dispersed into Eurasia
But there are no ostrich fossils in Africa before the Miocene, while
there's at least *Palaeotis* in Europe.
along island chains, a route has been hypothesized for lacertid
> lizards (Hipsley et al., 2009, BMC Evolutionary Biology).
Lizards are better transoceanic dispersers than most birds.