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Re: New Papers of the Ya-Ya Sisterhood

Agreed. I didn't have any biogeographical hypothesis in mind when I brought up the fact that dromaeosaurids had been reported from all modern continents. But now that you mention it, it either means that the appearance of dromaeosaurids pre-dates the break-up of Pangaea; or that early dromaeosaurids could fly, and didn't need land connections to get from one landmass to another. But even if the latter was true (I think the jury is still out), you have to wonder if their flight abilities were adequate for long flights.

Well, the breakup of Pangaea only started for biogeographical purposes around the Early-Late Cretaceous boundary when Africa broke off of South America and apparently lost the spinosaur connection to Europe (...and Thailand). The Kimmeridgian "dromaeosaurine" teeth from Guimarota are much older than that.