27 May '11 19:27>
Originally posted by RJHindsHere is another quote on the ancestor of the modern penguin:
The following is a quote I found on Penguin sncestry:
Penguin ancestry beyond Waimanu remains unknown and not well-resolved by molecular or morphological analyses. The latter tend to be confounded by the strong adaptive autapomorphies of the Sphenisciformes; a sometimes perceived fairly close relationship between penguins and grebes is almost certainly an ...[text shortened]... the other hand, different DNA sequence datasets do not agree in detail with each other either.
Waimanu was flightless like all modern penguins. Though its wing bones do not show the extreme specializations modern penguins have for an aquatic lifestyle, it does seem adapted for wing-propelled diving, and may have resembled a flightless loon in body shape and maybe the Great Auk in its manner of locomotion. DNA sequence analyses and anatomy argue for a close relationships of penguins and loons, the former lineage specializing for wing-propelled and the latter for foot-propelled diving.
So there is no established connection ancestrally to a bird that could fly.