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Post by theropod on Sept 24, 2013 17:11:36 GMT 5
One gets the strong impression many taxa previously tought to have become extinct in the Turonian actually survived up to the very end of the mesozoic. I just stumbled across this: www.nrcresearchpress.com/doi/abs/10.1139/e78-015Carcharodontosaurs are also reported, based on big numbers of teeth and a maxillary fragment: www.sciencedirect.com/science/article/pii/S0195667112001176Megaraptora are supposedly an allosauroid clade newly evolving during the upper Cretaceous, even tough they have at times been referred to Coelurosauria: link.springer.com/article/10.1007%2Fs00114-009-0614-xThe following page contains a mention of possible spinosaurid remains: en.wikipedia.org/wiki/Maevarano_FormationThere have even been rumours of Pliosaurid and Diplodocid vertebrae, tough I suppose they would be quite difficult to assign and may be confused with (other) sauropods an/or plesiosaurs. It appears the C/T-event only had major effects on environments in the northern hemisphere and most groups actually survived, merely losing dominance.
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Post by theropod on Sept 24, 2013 22:55:00 GMT 5
Yes, for I suspect lots of material on this have the trait of being fragmentary and poorly studied. I already wrote about the spinosaurs.
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Post by creature386 on Sept 24, 2013 23:09:05 GMT 5
Looks like I overlooked it. Anyway, judging from this, the extinction "only" killed 26% of the genera. That is still terrible to the large genera, but not enough to kill long successful groups.
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Post by theropod on Oct 4, 2014 16:10:10 GMT 5
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