Lou: The mammals have been around a long long time, probably the whole time that there were dinosaurs. No reason why some dinosaurs could not have dispersed some cycads but I have never come across this being addressed. It would have to be a big bird to disperse cycad seed and most of the giant birds are after 65 mya. Harold At 05:54 PM 11/24/2011, you wrote: >Does anyone know of evidence that cycads were dispersed by >dinosaurs? I suppose it could be true, but some birds and small >mammals co-existed with the later dinosaurs, and could have >dispersed cycads prior to 65 Mya. If there really was a drop in >cycad diversity when the dinosaurs became extinct, as the article >says, this could very well have been an effect of the same >environmental changes (meteors, etc) that wiped out the dinosaurs. >Lou >_______________________________________________ >pbs mailing list >pbs@lists.ibiblio.org >http://pacificbulbsociety.org/list.php >http://pacificbulbsociety.org/pbswiki/