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this is what I see on my browser for that article on Pelagornis chilensis

Natural History“Huge Pseudoteeth” ruled the skies for approximately 50-60 
million years (yes, a lot longer than we’ve been around!), 
then vanished about 2 million years ago.  It was found in northern Chile (and 
perhaps elsewhere) 
and sported a long, slender beak lined with tooth-like projections. 

----- Original Message ----
From: Dann Pigdon <dannj@alphalink.com.au>

The direct quote is

"Bony-toothed birds were a very successful group, living during most of the 
Cenozoic period over a 

time span of 50 to 60 million years."

The article isn't mentioning any particular species, or even genus, when it 
gives the 50-60 million 

year timespan. It's like saying that coelacanths or lungfish as general groups 
have been around for 

400 million years. It doesn't imply that any individual species or even genus 
has lasted all that time.