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.
This species is the oldest known member of its genus and was found in the La Meseta Formation of Seymour Island, Antarctica, dating back to the Middle or Late Eocene period (34-50 million years ago).  It has been identified through a substantial number of skeletal remains.