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Re: emu history
speaking of which, are the phorusracoids and their kin closely linked to ratites? I keep reading they are...then they arean't...then they are..With before i was just trying to point put why 45 MYA is good for the emu cassowarie split ( I know I spelt that wrong :p) but Tghe original question was about the timing of 80 million years which would be good for a split between Gondwana ratites and african ratites.
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>From: Ronald Orenstein >Reply-To: email@example.com >To: "Phil Hore" , firstname.lastname@example.org, email@example.com >Subject: Re: emu history >Date: Wed, 14 Jan 2004 18:26:14 -0500 > >At 04:56 PM 1/14/2004, Phil Hore wrote: > >>Would you not mean when Gondwana seperated from Africa? What does >>it matter to the ostrich when Australia seperated from Antartica, >>unless your saying they flew to Africa 45 million years ago. > >That is actually a possibility given some views on ostrich >relationships; Ostriches may have actually evolved in Eurasia >according to some, and I gather Cooper favoured this in his 2001 >paper. The point, anyway, is that the most recent date at which the >emu-cassowary lineage in Australia (there may have been some in >Antarctica, too, of course) could have bee!
sympatric with any other >flightless ratite lineages is the last date at which Australasia >broke away from Antarctica. > >>again, Africa and Gondwana, I cannot see anyway of a ratite getting >>to both Africa and Australia otherwise. This would be during the >>cretaceous- roughly 80 MYA. True Emus though evoloving of course >>must have been much later then that but the split must have been >>then! > >Bear in mind that we don't know anything about the ratite fauna of >pre-glacial Antarctica. Ostrich and emu ancestors could have >mingled there long after Africa broke away. > >-- >Ronald I. Orenstein Phone: (905) 820-7886 >International Wildlife Coalition Fax/Modem: (905) >569-0116 >1825 Shady Creek Court >Mississauga, Ontario, Canada L5L 3W2 >mailto:firstname.lastname@example.org > > >
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