It is also the oldest known species of its genus, as its remains were found in Middle or Late Eocene strata (34-50 MYA) of the La Meseta Formation on Seymour Island, Antarctica. It is known from a fair number of bones.
The discovery of this species, which is the oldest known member of its genus, dates back to the La Meseta Formation on Seymour Island in Antarctica during the Middle or Late Eocene period (34-50 million years ago).  It has been identified through a significant number of skeletal remains.