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The Oldest Fossil Giant Penguin Reveals Earlier Diversification

Tuesday, February 28, 2017 14:34

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Together with colleagues from New Zealand, Senckenberg scientist Dr. Gerald Mayr described a recently discovered fossil of a giant penguin with a body length of around 150 centimeters.

The new find dates back to the Paleocene era and, with an age of approx. 61 million years, counts among the oldest penguin fossils in the world. The bones differ significantly from those of other discoveries of the same age and indicate that the diversity of Paleocene penguins was higher than previously assumed. In their study, published today in the Springer journal The Science of Nature, the team of scientists therefore postulates that the evolution of penguins started much earlier than previously thought, probably already during the age of dinosaurs.

The Waipara giant penguin compared to an Emperor Penguin (the largest extant penguin species) and a human.

Credit: Senckenberg Gesellschaft für Naturforschung (Senckenberg Nature Research Society)

The fossil sites along the Waipara River in New Zealand’s Canterbury region are well known for their avian fossils, which were embedded in marine sand a mere 4 million years after the dinosaurs became extinct. “Among the finds from these sites, the skeletons of Waimanu, the oldest known penguin to date, are of particular importance,” explains Dr. Gerald Mayr of the Senckenberg Research Institute in Frankfurt.

Together with colleagues from the Canterbury Museum in New Zealand, Mayr now described a newly discovered penguin fossil from the famous fossil site. “What sets this fossil apart are the obvious differences compared to the previously known penguin remains from this period of geological history,” explains the ornithologist from Frankfurt, and he continues, “The leg bones we examined show that during its lifetime, the newly described penguin was significantly larger than its already described relatives. Moreover, it belongs to a species that is more closely related to penguins from later time periods.”

According to the researchers, the newly described penguin lived about 61 million years ago and reached a body length of approx. 150 centimeters — making it almost as big as Anthropornis nordenskjoeldi, the largest known fossil penguin, which lived in Antarctica around 45 to 33 million years ago, thus being much younger in geological terms.

“This shows that penguins reached an enormous size quite early in their evolutionary history, around 60 million years ago,” adds Mayr. In addition, the team of scientists from New Zealand and Germany assumes that the newly discovered penguin species also differed from their more primitive relatives in the genus Waimanu in their mode of locomotion: The large penguins presumably already moved with the upright, waddling gait characteristic for today’s penguins.

“The discoveries show that penguin diversity in the early Paleocene was clearly higher than we previously assumed,” says Mayr, and he adds, “In turn, this diversity indicates that the first representatives of penguins already arose during the age of dinosaurs, more than 65 million years ago.”

Contacts and sources:
Melanie Lehnert
Springer

Mayr, G. et al. (2017). A new fossil from the mid-Paleocene of New Zealand reveals an unexpected diversity of world’s oldest penguins, The Science of Nature.DOI 10.1007/s00114-017-1441-0 http://dx.doi.org/10.1007/s00114-017-1441-0

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