The story of Rosie’s Penguin is published in the Journal of Vertebrate Paleontology by Dr Gerald Mayr of the Senckenberg Research Institute in Frankfurt, Dr Paul Scofield Senior Curator Natural History Canterbury Museum, Dr Vanesa De Pietri Research Curator Natural History Canterbury Museum and fossil collectors Leigh Love and Al Mannering.
Rosie’s Penguin comprises an almost complete skeleton, missing only its feet and a few other remains. The specimen was recovered from greensand rocks near Waipara by Leigh Love and Al Mannering in May 2015. This region has yielded a number of fossil remains over the years.
According to Dr Scofield, this penguin lived a million or so years after the 62-million-year-old Mannering’s Penguin (Waimanu manneringi), the world’s oldest penguin fossil:
“It only just misses out on also holding the record for being the world’s oldest penguin.”
“When Rosie’s Penguin was found the consensus among the research team was that it represented a more complete specimen of Mannering’s Penguin, which it more or less matched in size and resembled in some skeletal features. Following CT-scanning and close inspection of the specimen over the past year, however, we discovered that this specimen was actually quite different from Mannering’s Penguin, and represents a new genus and species.”
Rosie’s Penguin owes its name to the late wife of the land owner of the farm on which the Waipara Greensand is exposed. The diversity of penguins recovered from the Waipara region includes the 1.5 metre tall, recently-discovered Waipara giant penguin that is yet to be named.
Excluding one specimen of Waipara Penguin, all of these early penguin fossils are housed at Canterbury Museum.
Dr De Pietri adds, “Following the impact of a large asteroid 66 million years ago, birds were able to conquer a vast array of habitats left vacant by the demise of dinosaurs and other land and aquatic vertebrates.
Through the fossil record, we know that New Zealand played a significant role in the early evolution of modern birds, especially amongst penguins, during the ten million years that followed the extinction of the dinosaurs.
Worldwide, the fossil record of birds this age is poor, which makes Canterbury Museum’s collection of penguins from the Paleocene Epoch (66 to 56 million years ago) so significant.”
Image: Rosie’s Penguin in storage at Canterbury Museum.
You can see the CT scanned skull online here.